{"id":4697,"date":"2019-12-03T01:40:04","date_gmt":"2019-12-03T01:40:04","guid":{"rendered":"https:\/\/www.dumpsbase.com\/freedumps\/?p=4697"},"modified":"2019-12-03T01:41:34","modified_gmt":"2019-12-03T01:41:34","slug":"bta-certified-blockchain-developer-ethereum-cbde-practice-questions","status":"publish","type":"post","link":"https:\/\/www.dumpsbase.com\/freedumps\/bta-certified-blockchain-developer-ethereum-cbde-practice-questions.html","title":{"rendered":"BTA Certified Blockchain Developer &#8211; Ethereum CBDE Practice Questions"},"content":{"rendered":"\n<p>Complete your BTA Certified Blockchain Developer &#8211; Ethereum exam to demonstrate your knowledge and skills in this emerging space and become a member of a community of Blockchain leaders. We provide you BTA Certified Blockchain Developer &#8211; Ethereum CBDE Practice Questions with online exam questions and accurate answers. You can gain more from CBDE practice questions and pass BTA Certified Blockchain Developer &#8211; Ethereum certification exam in the first try.<\/p>\n<h2><span style=\"color: #0000ff;\"><strong>Read CBDE Free Dumps Questions Before Buying<\/strong><\/span><\/h2>\n<script>\n  window.fbAsyncInit = function() {\n    FB.init({\n      appId            : '622169541470367',\n      autoLogAppEvents : true,\n      xfbml            : true,\n      version          : 'v3.1'\n    });\n  };\n\n  (function(d, s, id){\n     var js, fjs = d.getElementsByTagName(s)[0];\n     if (d.getElementById(id)) {return;}\n     js = d.createElement(s); js.id = id;\n     js.src = \"https:\/\/connect.facebook.net\/en_US\/sdk.js\";\n     fjs.parentNode.insertBefore(js, fjs);\n   }(document, 'script', 'facebook-jssdk'));\n<\/script><div id=\"watu_quiz\" class=\"quiz-area single-page-quiz\">\n<p><\/p><form action=\"\" method=\"post\" class=\"quiz-form \" id=\"quiz-2023\" >\n<div class='watu-question' id='question-1'><div class='question-content'><p><span class='watu_num'>1. <\/span>Consensus is reached:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116089' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478772' \/><div class='watu-question-choice'><input type='radio' name='answer-116089[]' id='answer-id-478772' class='answer answer-1  answerof-116089' value='478772' \/>&nbsp;<label for='answer-id-478772' id='answer-label-478772' class=' answer label-1'><span class='answer'>by the miner nodes which make sure that a transaction is valid.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478773' \/><div class='watu-question-choice'><input type='radio' name='answer-116089[]' id='answer-id-478773' class='answer answer-1  answerof-116089' value='478773' \/>&nbsp;<label for='answer-id-478773' id='answer-label-478773' class=' answer label-1'><span class='answer'>by every single node in the blockchain network executing the same transaction.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478774' \/><div class='watu-question-choice'><input type='radio' name='answer-116089[]' id='answer-id-478774' class='answer answer-1  answerof-116089' value='478774' \/>&nbsp;<label for='answer-id-478774' id='answer-label-478774' class=' answer label-1'><span class='answer'>by a cryptographic secure signature algorithm called ECDSA which makes sure that cheating is impossible.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType1' value='radio' class=''><\/div><div class='watu-question' id='question-2'><div class='question-content'><p><span class='watu_num'>2. <\/span>Smart Contracts can be written in:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116090' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478775' \/><div class='watu-question-choice'><input type='radio' name='answer-116090[]' id='answer-id-478775' class='answer answer-2  answerof-116090' value='478775' \/>&nbsp;<label for='answer-id-478775' id='answer-label-478775' class=' answer label-2'><span class='answer'>Java, C++, Solidity and JavaScript, because the Ethereum Blockchain is completely language agnostic and cross compilers exist for every major language.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478776' \/><div class='watu-question-choice'><input type='radio' name='answer-116090[]' id='answer-id-478776' class='answer answer-2  answerof-116090' value='478776' \/>&nbsp;<label for='answer-id-478776' id='answer-label-478776' class=' answer label-2'><span class='answer'>Solidity, Viper, LLL and Serpent, because those are high level languages that are compiled down to bytecode.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478777' \/><div class='watu-question-choice'><input type='radio' name='answer-116090[]' id='answer-id-478777' class='answer answer-2  answerof-116090' value='478777' \/>&nbsp;<label for='answer-id-478777' id='answer-label-478777' class=' answer label-2'><span class='answer'>Solidity and JavaScript, because those are the official first implementations for Distributed applications and the Blockchain supports those languages fully.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType2' value='radio' class=''><\/div><div class='watu-question' id='question-3'><div class='question-content'><p><span class='watu_num'>3. <\/span>Solidity gets compiled:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116091' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478778' \/><div class='watu-question-choice'><input type='radio' name='answer-116091[]' id='answer-id-478778' class='answer answer-3  answerof-116091' value='478778' \/>&nbsp;<label for='answer-id-478778' id='answer-label-478778' class=' answer label-3'><span class='answer'>to bytecode that can&#8217;t be understood by humans.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478779' \/><div class='watu-question-choice'><input type='radio' name='answer-116091[]' id='answer-id-478779' class='answer answer-3  answerof-116091' value='478779' \/>&nbsp;<label for='answer-id-478779' id='answer-label-478779' class=' answer label-3'><span class='answer'>to bytecodes which are essentially opcodes running instruction by instruction.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType3' value='radio' class=''><\/div><div class='watu-question' id='question-4'><div class='question-content'><p><span class='watu_num'>4. <\/span>Having a bug-bounty program early on:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116092' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478780' \/><div class='watu-question-choice'><input type='radio' name='answer-116092[]' id='answer-id-478780' class='answer answer-4  answerof-116092' value='478780' \/>&nbsp;<label for='answer-id-478780' id='answer-label-478780' class=' answer label-4'><span class='answer'>can help to engage the community in testing your smart contracts and therefore help to find bugs early.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478781' \/><div class='watu-question-choice'><input type='radio' name='answer-116092[]' id='answer-id-478781' class='answer answer-4  answerof-116092' value='478781' \/>&nbsp;<label for='answer-id-478781' id='answer-label-478781' class=' answer label-4'><span class='answer'>might be a burden as it is an administrative overhead mainly.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478782' \/><div class='watu-question-choice'><input type='radio' name='answer-116092[]' id='answer-id-478782' class='answer answer-4  answerof-116092' value='478782' \/>&nbsp;<label for='answer-id-478782' id='answer-label-478782' class=' answer label-4'><span class='answer'>is completely useless. Who wants to test beta-ware software? It\u2019s better to start with the bug-bounty program after the contract is released on the main-net.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType4' value='radio' class=''><\/div><div class='watu-question' id='question-5'><div class='question-content'><p><span class='watu_num'>5. <\/span>Which is the right order for Denominations?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116093' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478783' \/><div class='watu-question-choice'><input type='radio' name='answer-116093[]' id='answer-id-478783' class='answer answer-5  answerof-116093' value='478783' \/>&nbsp;<label for='answer-id-478783' id='answer-label-478783' class=' answer label-5'><span class='answer'>Wei, Finney, Szabo, Ether, Tether.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478784' \/><div class='watu-question-choice'><input type='radio' name='answer-116093[]' id='answer-id-478784' class='answer answer-5  answerof-116093' value='478784' \/>&nbsp;<label for='answer-id-478784' id='answer-label-478784' class=' answer label-5'><span class='answer'>Finney, Szabo, Mether, Gwei.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478785' \/><div class='watu-question-choice'><input type='radio' name='answer-116093[]' id='answer-id-478785' class='answer answer-5  answerof-116093' value='478785' \/>&nbsp;<label for='answer-id-478785' id='answer-label-478785' class=' answer label-5'><span class='answer'>Gwei, Szabo, Finney, Ether.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType5' value='radio' class=''><\/div><div class='watu-question' id='question-6'><div class='question-content'><p><span class='watu_num'>6. <\/span>The nonce-field in a transaction is used:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116094' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478786' \/><div class='watu-question-choice'><input type='radio' name='answer-116094[]' id='answer-id-478786' class='answer answer-6  answerof-116094' value='478786' \/>&nbsp;<label for='answer-id-478786' id='answer-label-478786' class=' answer label-6'><span class='answer'>to protect against replay attacks.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478787' \/><div class='watu-question-choice'><input type='radio' name='answer-116094[]' id='answer-id-478787' class='answer answer-6  answerof-116094' value='478787' \/>&nbsp;<label for='answer-id-478787' id='answer-label-478787' class=' answer label-6'><span class='answer'>to have an additional checksum for transactions.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478788' \/><div class='watu-question-choice'><input type='radio' name='answer-116094[]' id='answer-id-478788' class='answer answer-6  answerof-116094' value='478788' \/>&nbsp;<label for='answer-id-478788' id='answer-label-478788' class=' answer label-6'><span class='answer'>to sum up all ethers sent from that address.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType6' value='radio' class=''><\/div><div class='watu-question' id='question-7'><div class='question-content'><p><span class='watu_num'>7. <\/span>Which statement is true about the EVM?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116095' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478789' \/><div class='watu-question-choice'><input type='radio' name='answer-116095[]' id='answer-id-478789' class='answer answer-7  answerof-116095' value='478789' \/>&nbsp;<label for='answer-id-478789' id='answer-label-478789' class=' answer label-7'><span class='answer'>While the EVM is Sandboxed, it isn&#8217;t as powerful as the Bitcoin Network, because it&#8217;s not Turing Complete.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478790' \/><div class='watu-question-choice'><input type='radio' name='answer-116095[]' id='answer-id-478790' class='answer answer-7  answerof-116095' value='478790' \/>&nbsp;<label for='answer-id-478790' id='answer-label-478790' class=' answer label-7'><span class='answer'>The EVM can&#8217;t access hardware layers or anything outside a blockchain node because it&#8217;s sandboxed.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478791' \/><div class='watu-question-choice'><input type='radio' name='answer-116095[]' id='answer-id-478791' class='answer answer-7  answerof-116095' value='478791' \/>&nbsp;<label for='answer-id-478791' id='answer-label-478791' class=' answer label-7'><span class='answer'>The EVM is extremely powerful, turing complete and perfect for doing computational intensive things, because of the direct access to the graphics card.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType7' value='radio' class=''><\/div><div class='watu-question' id='question-8'><div class='question-content'><p><span class='watu_num'>8. <\/span>DApps are:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116096' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478792' \/><div class='watu-question-choice'><input type='radio' name='answer-116096[]' id='answer-id-478792' class='answer answer-8  answerof-116096' value='478792' \/>&nbsp;<label for='answer-id-478792' id='answer-label-478792' class=' answer label-8'><span class='answer'>great, because they cut the middle man, run on a trusted platform, apply logic to the blockchain where already economic assets are running and thus allow peer to peer trade.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478793' \/><div class='watu-question-choice'><input type='radio' name='answer-116096[]' id='answer-id-478793' class='answer answer-8  answerof-116096' value='478793' \/>&nbsp;<label for='answer-id-478793' id='answer-label-478793' class=' answer label-8'><span class='answer'>an amazing way to create new applications. Those applications run entirely separated from other applications on the platform and allow for logical interactions. They can&#8217;t access any funds to add an additional layer of trust.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478794' \/><div class='watu-question-choice'><input type='radio' name='answer-116096[]' id='answer-id-478794' class='answer answer-8  answerof-116096' value='478794' \/>&nbsp;<label for='answer-id-478794' id='answer-label-478794' class=' answer label-8'><span class='answer'>a new way of applying logical operations for banks and big financial institutions. This way they can reduce the staff while operating at increased security.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType8' value='radio' class=''><\/div><div class='watu-question' id='question-9'><div class='question-content'><p><span class='watu_num'>9. <\/span>To get most out of the blockchain, it is best:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116097' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478795' \/><div class='watu-question-choice'><input type='radio' name='answer-116097[]' id='answer-id-478795' class='answer answer-9  answerof-116097' value='478795' \/>&nbsp;<label for='answer-id-478795' id='answer-label-478795' class=' answer label-9'><span class='answer'>to use it for the whole business logic. It\u2019s always best to have everything in once place.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478796' \/><div class='watu-question-choice'><input type='radio' name='answer-116097[]' id='answer-id-478796' class='answer answer-9  answerof-116097' value='478796' \/>&nbsp;<label for='answer-id-478796' id='answer-label-478796' class=' answer label-9'><span class='answer'>to use it only for things which need the benefits of the blockchain.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType9' value='radio' class=''><\/div><div class='watu-question' id='question-10'><div class='question-content'><p><span class='watu_num'>10. <\/span>A Hashing Algorithm is deterministic.<br \/>\n<br \/>What does it mean?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116098' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478797' \/><div class='watu-question-choice'><input type='radio' name='answer-116098[]' id='answer-id-478797' class='answer answer-10  answerof-116098' value='478797' \/>&nbsp;<label for='answer-id-478797' id='answer-label-478797' class=' answer label-10'><span class='answer'>it always produces the same output given the same input.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478798' \/><div class='watu-question-choice'><input type='radio' name='answer-116098[]' id='answer-id-478798' class='answer answer-10  answerof-116098' value='478798' \/>&nbsp;<label for='answer-id-478798' id='answer-label-478798' class=' answer label-10'><span class='answer'>it uses equally distributed data to produce the output given a long input.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478799' \/><div class='watu-question-choice'><input type='radio' name='answer-116098[]' id='answer-id-478799' class='answer answer-10  answerof-116098' value='478799' \/>&nbsp;<label for='answer-id-478799' id='answer-label-478799' class=' answer label-10'><span class='answer'>it shouldn&#8217;t be possible to re-generate the input given the output.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType10' value='radio' class=''><\/div><div class='watu-question' id='question-11'><div class='question-content'><p><span class='watu_num'>11. <\/span>What&#8217;s the correct scientific notation?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116099' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478800' \/><div class='watu-question-choice'><input type='radio' name='answer-116099[]' id='answer-id-478800' class='answer answer-11  answerof-116099' value='478800' \/>&nbsp;<label for='answer-id-478800' id='answer-label-478800' class=' answer label-11'><span class='answer'>1 Ether = 10^18 wei, 10^9 Gwei, 10^3 Finney<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478801' \/><div class='watu-question-choice'><input type='radio' name='answer-116099[]' id='answer-id-478801' class='answer answer-11  answerof-116099' value='478801' \/>&nbsp;<label for='answer-id-478801' id='answer-label-478801' class=' answer label-11'><span class='answer'>1 Ether = 10^19 wei, 10^13 Gwei, 10^3 Finney<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478802' \/><div class='watu-question-choice'><input type='radio' name='answer-116099[]' id='answer-id-478802' class='answer answer-11  answerof-116099' value='478802' \/>&nbsp;<label for='answer-id-478802' id='answer-label-478802' class=' answer label-11'><span class='answer'>1 Ether = 10^16 wei, 10^13 Gwei, 10^3 Finney<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478803' \/><div class='watu-question-choice'><input type='radio' name='answer-116099[]' id='answer-id-478803' class='answer answer-11  answerof-116099' value='478803' \/>&nbsp;<label for='answer-id-478803' id='answer-label-478803' class=' answer label-11'><span class='answer'>1 Ether = 10^18 wei, 10^6 Gwei, 10^6 Finney<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType11' value='radio' class=''><\/div><div class='watu-question' id='question-12'><div class='question-content'><p><span class='watu_num'>12. <\/span>What are Private Keys used for?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116100' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478804' \/><div class='watu-question-choice'><input type='radio' name='answer-116100[]' id='answer-id-478804' class='answer answer-12  answerof-116100' value='478804' \/>&nbsp;<label for='answer-id-478804' id='answer-label-478804' class=' answer label-12'><span class='answer'>To Protect the Public Keys by being cryptographically significant.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478805' \/><div class='watu-question-choice'><input type='radio' name='answer-116100[]' id='answer-id-478805' class='answer answer-12  answerof-116100' value='478805' \/>&nbsp;<label for='answer-id-478805' id='answer-label-478805' class=' answer label-12'><span class='answer'>To Sign Transactions And To Derive an Address From.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478806' \/><div class='watu-question-choice'><input type='radio' name='answer-116100[]' id='answer-id-478806' class='answer answer-12  answerof-116100' value='478806' \/>&nbsp;<label for='answer-id-478806' id='answer-label-478806' class=' answer label-12'><span class='answer'>To Generate An Address which can sign transactions.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType12' value='radio' class=''><\/div><div class='watu-question' id='question-13'><div class='question-content'><p><span class='watu_num'>13. <\/span>Public Keys vs. Private Keys.<br \/>\n<br \/>Which statement is true?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116101' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478807' \/><div class='watu-question-choice'><input type='radio' name='answer-116101[]' id='answer-id-478807' class='answer answer-13  answerof-116101' value='478807' \/>&nbsp;<label for='answer-id-478807' id='answer-label-478807' class=' answer label-13'><span class='answer'>The Public Key is for Signing Transactions, the Private Key must be given out to verify the signature.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478808' \/><div class='watu-question-choice'><input type='radio' name='answer-116101[]' id='answer-id-478808' class='answer answer-13  answerof-116101' value='478808' \/>&nbsp;<label for='answer-id-478808' id='answer-label-478808' class=' answer label-13'><span class='answer'>The Private Key signs transactions, the Public Key can verify the signature.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478809' \/><div class='watu-question-choice'><input type='radio' name='answer-116101[]' id='answer-id-478809' class='answer answer-13  answerof-116101' value='478809' \/>&nbsp;<label for='answer-id-478809' id='answer-label-478809' class=' answer label-13'><span class='answer'>The Private Key is to generate a Public Key. The Public Key can sign transactions, the address is here to verify the transactions.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType13' value='radio' class=''><\/div><div class='watu-question' id='question-14'><div class='question-content'><p><span class='watu_num'>14. <\/span>Proof of Work (PoW) vs. Proof of Stake.<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116102' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478810' \/><div class='watu-question-choice'><input type='radio' name='answer-116102[]' id='answer-id-478810' class='answer answer-14  answerof-116102' value='478810' \/>&nbsp;<label for='answer-id-478810' id='answer-label-478810' class=' answer label-14'><span class='answer'>PoW is computationally intensive which requires lots of energy. On the other hand, miners earn straightforward a reward for mining a block and incorporating transactions.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478811' \/><div class='watu-question-choice'><input type='radio' name='answer-116102[]' id='answer-id-478811' class='answer answer-14  answerof-116102' value='478811' \/>&nbsp;<label for='answer-id-478811' id='answer-label-478811' class=' answer label-14'><span class='answer'>PoW is better than PoS, because with PoS we increase the amount of energy spent on the network.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478812' \/><div class='watu-question-choice'><input type='radio' name='answer-116102[]' id='answer-id-478812' class='answer answer-14  answerof-116102' value='478812' \/>&nbsp;<label for='answer-id-478812' id='answer-label-478812' class=' answer label-14'><span class='answer'>PoS is mining with specialized new hardware that has to be purchased with a stack of Ether in the network. Hence the Name: Proof of Stake, which derives from Stack.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType14' value='radio' class=''><\/div><div class='watu-question' id='question-15'><div class='question-content'><p><span class='watu_num'>15. <\/span>Externally Owned Accounts:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116103' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478813' \/><div class='watu-question-choice'><input type='radio' name='answer-116103[]' id='answer-id-478813' class='answer answer-15  answerof-116103' value='478813' \/>&nbsp;<label for='answer-id-478813' id='answer-label-478813' class=' answer label-15'><span class='answer'>can be destroyed using the selfdestruct keyword. This way all remaining ether will be sent to the receiver address, regardless if they have a fallback function or not.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478814' \/><div class='watu-question-choice'><input type='radio' name='answer-116103[]' id='answer-id-478814' class='answer answer-15  answerof-116103' value='478814' \/>&nbsp;<label for='answer-id-478814' id='answer-label-478814' class=' answer label-15'><span class='answer'>are bound to a private key which is necessary to sign transactions outgoing from that account.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478815' \/><div class='watu-question-choice'><input type='radio' name='answer-116103[]' id='answer-id-478815' class='answer answer-15  answerof-116103' value='478815' \/>&nbsp;<label for='answer-id-478815' id='answer-label-478815' class=' answer label-15'><span class='answer'>are logical opcodes running on the ethereum blockchain very similar to smart contracts.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType15' value='radio' class=''><\/div><div class='watu-question' id='question-16'><div class='question-content'><p><span class='watu_num'>16. <\/span>Smart Contracts:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116104' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='482036' \/><div class='watu-question-choice'><input type='radio' name='answer-116104[]' id='answer-id-482036' class='answer answer-16  answerof-116104' value='482036' \/>&nbsp;<label for='answer-id-482036' id='answer-label-482036' class=' answer label-16'><span class='answer'>are always living on the same address, because the blockchain is deterministic. So, one account can always have one smart contract.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='482037' \/><div class='watu-question-choice'><input type='radio' name='answer-116104[]' id='answer-id-482037' class='answer answer-16  answerof-116104' value='482037' \/>&nbsp;<label for='answer-id-482037' id='answer-label-482037' class=' answer label-16'><span class='answer'>are having the same address as the EOA.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='482038' \/><div class='watu-question-choice'><input type='radio' name='answer-116104[]' id='answer-id-482038' class='answer answer-16  answerof-116104' value='482038' \/>&nbsp;<label for='answer-id-482038' id='answer-label-482038' class=' answer label-16'><span class='answer'>are sitting on their own address. The Address is created from the nonce and the EOA address and could be known in advance before deploying the smart contract.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='482039' \/><div class='watu-question-choice'><input type='radio' name='answer-116104[]' id='answer-id-482039' class='answer answer-16  answerof-116104' value='482039' \/>&nbsp;<label for='answer-id-482039' id='answer-label-482039' class=' answer label-16'><span class='answer'>the address of the smart contract is a random address which gets generated by the miner who mines the contract-creation transaction.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType16' value='radio' class=''><\/div><div class='watu-question' id='question-17'><div class='question-content'><p><span class='watu_num'>17. <\/span>Transactions containing the same data to create the same smart contract are:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116105' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478817' \/><div class='watu-question-choice'><input type='radio' name='answer-116105[]' id='answer-id-478817' class='answer answer-17  answerof-116105' value='478817' \/>&nbsp;<label for='answer-id-478817' id='answer-label-478817' class=' answer label-17'><span class='answer'>always having the same signature.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478818' \/><div class='watu-question-choice'><input type='radio' name='answer-116105[]' id='answer-id-478818' class='answer answer-17  answerof-116105' value='478818' \/>&nbsp;<label for='answer-id-478818' id='answer-label-478818' class=' answer label-17'><span class='answer'>having a different signature because of the nonce which changes upon every transaction.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType17' value='radio' class=''><\/div><div class='watu-question' id='question-18'><div class='question-content'><p><span class='watu_num'>18. <\/span>Sending one Ether is actually internally translated:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116106' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478819' \/><div class='watu-question-choice'><input type='radio' name='answer-116106[]' id='answer-id-478819' class='answer answer-18  answerof-116106' value='478819' \/>&nbsp;<label for='answer-id-478819' id='answer-label-478819' class=' answer label-18'><span class='answer'>to Wei, so it will send the equivalent of 10^18 Wei.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478820' \/><div class='watu-question-choice'><input type='radio' name='answer-116106[]' id='answer-id-478820' class='answer answer-18  answerof-116106' value='478820' \/>&nbsp;<label for='answer-id-478820' id='answer-label-478820' class=' answer label-18'><span class='answer'>to Finney, so it will send the equivalent of 10^3 Finney.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478821' \/><div class='watu-question-choice'><input type='radio' name='answer-116106[]' id='answer-id-478821' class='answer answer-18  answerof-116106' value='478821' \/>&nbsp;<label for='answer-id-478821' id='answer-label-478821' class=' answer label-18'><span class='answer'>to Szabo, so it will send the equivalent of 10^6 Szabo.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType18' value='radio' class=''><\/div><div class='watu-question' id='question-19'><div class='question-content'><p><span class='watu_num'>19. <\/span>Hashing Mining uses:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116107' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478822' \/><div class='watu-question-choice'><input type='radio' name='answer-116107[]' id='answer-id-478822' class='answer answer-19  answerof-116107' value='478822' \/>&nbsp;<label for='answer-id-478822' id='answer-label-478822' class=' answer label-19'><span class='answer'>Keccack256 while internally to hash values it&#8217;s easy to use the Dagger-Hashimoto to create a meaningful hash.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478823' \/><div class='watu-question-choice'><input type='radio' name='answer-116107[]' id='answer-id-478823' class='answer answer-19  answerof-116107' value='478823' \/>&nbsp;<label for='answer-id-478823' id='answer-label-478823' class=' answer label-19'><span class='answer'>the Dagger-Hashimoto hashing while internally the EVM uses SHA256 which is an alias for Keccack256.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478824' \/><div class='watu-question-choice'><input type='radio' name='answer-116107[]' id='answer-id-478824' class='answer answer-19  answerof-116107' value='478824' \/>&nbsp;<label for='answer-id-478824' id='answer-label-478824' class=' answer label-19'><span class='answer'>the Dagger-Hashimoto hashing while internally the EVM uses Keccack256 which is almost similar to SHA256, but has a different padding so produces different hashes.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType19' value='radio' class=''><\/div><div class='watu-question' id='question-20'><div class='question-content'><p><span class='watu_num'>20. <\/span>PoS:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116108' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478825' \/><div class='watu-question-choice'><input type='radio' name='answer-116108[]' id='answer-id-478825' class='answer answer-20  answerof-116108' value='478825' \/>&nbsp;<label for='answer-id-478825' id='answer-label-478825' class=' answer label-20'><span class='answer'>would be better, because it can reduce the amount of energy needed for mining.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478826' \/><div class='watu-question-choice'><input type='radio' name='answer-116108[]' id='answer-id-478826' class='answer answer-20  answerof-116108' value='478826' \/>&nbsp;<label for='answer-id-478826' id='answer-label-478826' class=' answer label-20'><span class='answer'>would be worse, because it would increase the amount of energy needed for mining.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType20' value='radio' class=''><\/div><div class='watu-question' id='question-21'><div class='question-content'><p><span class='watu_num'>21. <\/span>Externally Owned Accounts (EoA):<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116109' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478827' \/><div class='watu-question-choice'><input type='radio' name='answer-116109[]' id='answer-id-478827' class='answer answer-21  answerof-116109' value='478827' \/>&nbsp;<label for='answer-id-478827' id='answer-label-478827' class=' answer label-21'><span class='answer'>are changing their address every time a Transaction is sent because of the nonce.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478828' \/><div class='watu-question-choice'><input type='radio' name='answer-116109[]' id='answer-id-478828' class='answer answer-21  answerof-116109' value='478828' \/>&nbsp;<label for='answer-id-478828' id='answer-label-478828' class=' answer label-21'><span class='answer'>are keeping their address, but on the blockchain a nonce is increased every time they send a transaction to avoid replay attacks.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType21' value='radio' class=''><\/div><div class='watu-question' id='question-22'><div class='question-content'><p><span class='watu_num'>22. <\/span>What are Ethereum Nodes?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116110' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478829' \/><div class='watu-question-choice'><input type='radio' name='answer-116110[]' id='answer-id-478829' class='answer answer-22  answerof-116110' value='478829' \/>&nbsp;<label for='answer-id-478829' id='answer-label-478829' class=' answer label-22'><span class='answer'>Programs implementing the Ethereum Protocol to talk to each other and JSON-RPC interfaces to talk to the outside world.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478830' \/><div class='watu-question-choice'><input type='radio' name='answer-116110[]' id='answer-id-478830' class='answer answer-22  answerof-116110' value='478830' \/>&nbsp;<label for='answer-id-478830' id='answer-label-478830' class=' answer label-22'><span class='answer'>A Java-Script library to compile and run Solidity Code.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478831' \/><div class='watu-question-choice'><input type='radio' name='answer-116110[]' id='answer-id-478831' class='answer answer-22  answerof-116110' value='478831' \/>&nbsp;<label for='answer-id-478831' id='answer-label-478831' class=' answer label-22'><span class='answer'>A Framework for deploying and running smart contract in a decentralized way.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType22' value='radio' class=''><\/div><div class='watu-question' id='question-23'><div class='question-content'><p><span class='watu_num'>23. <\/span>To communicate with an Ethereum node via JavaScript:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116111' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478832' \/><div class='watu-question-choice'><input type='radio' name='answer-116111[]' id='answer-id-478832' class='answer answer-23  answerof-116111' value='478832' \/>&nbsp;<label for='answer-id-478832' id='answer-label-478832' class=' answer label-23'><span class='answer'>the library you use must make use of the JSON-RPC Interface of an Ethereum Node.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478833' \/><div class='watu-question-choice'><input type='radio' name='answer-116111[]' id='answer-id-478833' class='answer answer-23  answerof-116111' value='478833' \/>&nbsp;<label for='answer-id-478833' id='answer-label-478833' class=' answer label-23'><span class='answer'>must Implement the Ethereum Protocol to connect to other Ethereum Nodes.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478834' \/><div class='watu-question-choice'><input type='radio' name='answer-116111[]' id='answer-id-478834' class='answer answer-23  answerof-116111' value='478834' \/>&nbsp;<label for='answer-id-478834' id='answer-label-478834' class=' answer label-23'><span class='answer'>must use Web3.js, which is closed source to communicate to other Ethereum Nodes.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType23' value='radio' class=''><\/div><div class='watu-question' id='question-24'><div class='question-content'><p><span class='watu_num'>24. <\/span>It\u2019s possible to access the blockchain via an Ethereum Node:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116112' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478835' \/><div class='watu-question-choice'><input type='radio' name='answer-116112[]' id='answer-id-478835' class='answer answer-24  answerof-116112' value='478835' \/>&nbsp;<label for='answer-id-478835' id='answer-label-478835' class=' answer label-24'><span class='answer'>only via JavaScript because there is the proprietary Web3.js library.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478836' \/><div class='watu-question-choice'><input type='radio' name='answer-116112[]' id='answer-id-478836' class='answer answer-24  answerof-116112' value='478836' \/>&nbsp;<label for='answer-id-478836' id='answer-label-478836' class=' answer label-24'><span class='answer'>by any programming language, as long as it adheres to the JSON-RPC standard.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType24' value='radio' class=''><\/div><div class='watu-question' id='question-25'><div class='question-content'><p><span class='watu_num'>25. <\/span>A Private Network is:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116113' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478837' \/><div class='watu-question-choice'><input type='radio' name='answer-116113[]' id='answer-id-478837' class='answer answer-25  answerof-116113' value='478837' \/>&nbsp;<label for='answer-id-478837' id='answer-label-478837' class=' answer label-25'><span class='answer'>a side Channel to the Ethereum Main Net which costs less gas to run smart contracts.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478838' \/><div class='watu-question-choice'><input type='radio' name='answer-116113[]' id='answer-id-478838' class='answer answer-25  answerof-116113' value='478838' \/>&nbsp;<label for='answer-id-478838' id='answer-label-478838' class=' answer label-25'><span class='answer'>an exact clone of the Rinkeby Test-Network which can be started as virtual machine in the Azure Cloud.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478839' \/><div class='watu-question-choice'><input type='radio' name='answer-116113[]' id='answer-id-478839' class='answer answer-25  answerof-116113' value='478839' \/>&nbsp;<label for='answer-id-478839' id='answer-label-478839' class=' answer label-25'><span class='answer'>a Network running only in a private area, where people cannot join freely and openly.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType25' value='radio' class=''><\/div><div class='watu-question' id='question-26'><div class='question-content'><p><span class='watu_num'>26. <\/span>For Rapid Development Cycles it&#8217;s good:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116114' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478840' \/><div class='watu-question-choice'><input type='radio' name='answer-116114[]' id='answer-id-478840' class='answer answer-26  answerof-116114' value='478840' \/>&nbsp;<label for='answer-id-478840' id='answer-label-478840' class=' answer label-26'><span class='answer'>to deploy to the main-network as quickly as possible.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478841' \/><div class='watu-question-choice'><input type='radio' name='answer-116114[]' id='answer-id-478841' class='answer answer-26  answerof-116114' value='478841' \/>&nbsp;<label for='answer-id-478841' id='answer-label-478841' class=' answer label-26'><span class='answer'>to use in-memory blockchain simulations, because mining works instantaneously.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478842' \/><div class='watu-question-choice'><input type='radio' name='answer-116114[]' id='answer-id-478842' class='answer answer-26  answerof-116114' value='478842' \/>&nbsp;<label for='answer-id-478842' id='answer-label-478842' class=' answer label-26'><span class='answer'>to use a private network at all times, because this is the closest you get to the real network.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType26' value='radio' class=''><\/div><div class='watu-question' id='question-27'><div class='question-content'><p><span class='watu_num'>27. <\/span>Go-Ethereum vs. Ganache:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116115' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478843' \/><div class='watu-question-choice'><input type='radio' name='answer-116115[]' id='answer-id-478843' class='answer answer-27  answerof-116115' value='478843' \/>&nbsp;<label for='answer-id-478843' id='answer-label-478843' class=' answer label-27'><span class='answer'>both are the same, just implemented in a different language.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478844' \/><div class='watu-question-choice'><input type='radio' name='answer-116115[]' id='answer-id-478844' class='answer answer-27  answerof-116115' value='478844' \/>&nbsp;<label for='answer-id-478844' id='answer-label-478844' class=' answer label-27'><span class='answer'>with Go-Ethereum you get a real blockchain node where you can create your own local private network, connect to Test-Networks or the Main-Net, while with Ganache you get an in-memory blockchain simulation.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478845' \/><div class='watu-question-choice'><input type='radio' name='answer-116115[]' id='answer-id-478845' class='answer answer-27  answerof-116115' value='478845' \/>&nbsp;<label for='answer-id-478845' id='answer-label-478845' class=' answer label-27'><span class='answer'>with Ganache you get a real blockchain node where you can connect to the Test-Networks Rinkeby and Ropsten.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType27' value='radio' class=''><\/div><div class='watu-question' id='question-28'><div class='question-content'><p><span class='watu_num'>28. <\/span>Block Timestamp:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116116' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478846' \/><div class='watu-question-choice'><input type='radio' name='answer-116116[]' id='answer-id-478846' class='answer answer-28  answerof-116116' value='478846' \/>&nbsp;<label for='answer-id-478846' id='answer-label-478846' class=' answer label-28'><span class='answer'>the timestamp is based on the time zone of the miner, that is why it changes the difficulty continuously to reflect network latency.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478847' \/><div class='watu-question-choice'><input type='radio' name='answer-116116[]' id='answer-id-478847' class='answer answer-28  answerof-116116' value='478847' \/>&nbsp;<label for='answer-id-478847' id='answer-label-478847' class=' answer label-28'><span class='answer'>the timestamp can&#8217;t be influenced by a miner and is generally considered safe to be used for randomness on the blockchain.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478848' \/><div class='watu-question-choice'><input type='radio' name='answer-116116[]' id='answer-id-478848' class='answer answer-28  answerof-116116' value='478848' \/>&nbsp;<label for='answer-id-478848' id='answer-label-478848' class=' answer label-28'><span class='answer'>the timestamp can be influenced by a miner to a certain degree but it&#8217;s always independent from the time-zone.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType28' value='radio' class=''><\/div><div class='watu-question' id='question-29'><div class='question-content'><p><span class='watu_num'>29. <\/span>Block Difficulty:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116117' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478849' \/><div class='watu-question-choice'><input type='radio' name='answer-116117[]' id='answer-id-478849' class='answer answer-29  answerof-116117' value='478849' \/>&nbsp;<label for='answer-id-478849' id='answer-label-478849' class=' answer label-29'><span class='answer'>is determined by the Ethereum Committee every fortnight to reflect the average amount of transaction and it cannot be influenced by the network itself.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478850' \/><div class='watu-question-choice'><input type='radio' name='answer-116117[]' id='answer-id-478850' class='answer answer-29  answerof-116117' value='478850' \/>&nbsp;<label for='answer-id-478850' id='answer-label-478850' class=' answer label-29'><span class='answer'>increases when the time between mined blocks is below 10 seconds, while it decreases when the time is above 20 seconds.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478851' \/><div class='watu-question-choice'><input type='radio' name='answer-116117[]' id='answer-id-478851' class='answer answer-29  answerof-116117' value='478851' \/>&nbsp;<label for='answer-id-478851' id='answer-label-478851' class=' answer label-29'><span class='answer'>increases when the time between mined blocks is below 20 seconds, while it decreases when the time is above 60 seconds.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType29' value='radio' class=''><\/div><div class='watu-question' id='question-30'><div class='question-content'><p><span class='watu_num'>30. <\/span>Ethereum Nodes:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116118' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478852' \/><div class='watu-question-choice'><input type='radio' name='answer-116118[]' id='answer-id-478852' class='answer answer-30  answerof-116118' value='478852' \/>&nbsp;<label for='answer-id-478852' id='answer-label-478852' class=' answer label-30'><span class='answer'>must implement the Ethereum protocol and external access can only be done via the proprietary Ethereum Libraries like Web3.js.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478853' \/><div class='watu-question-choice'><input type='radio' name='answer-116118[]' id='answer-id-478853' class='answer answer-30  answerof-116118' value='478853' \/>&nbsp;<label for='answer-id-478853' id='answer-label-478853' class=' answer label-30'><span class='answer'>must implement the Ethereum Protocol and a JSON-RPC to talk with clients.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478854' \/><div class='watu-question-choice'><input type='radio' name='answer-116118[]' id='answer-id-478854' class='answer answer-30  answerof-116118' value='478854' \/>&nbsp;<label for='answer-id-478854' id='answer-label-478854' class=' answer label-30'><span class='answer'>must implement Web3.js to interact with Websites.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType30' value='radio' class=''><\/div><div class='watu-question' id='question-31'><div class='question-content'><p><span class='watu_num'>31. <\/span>When a new block is mined:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116119' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478855' \/><div class='watu-question-choice'><input type='radio' name='answer-116119[]' id='answer-id-478855' class='answer answer-31  answerof-116119' value='478855' \/>&nbsp;<label for='answer-id-478855' id='answer-label-478855' class=' answer label-31'><span class='answer'>a list of transactions as well as uncles is incorporated in the block. All gas that is used during those transactions is added to the miners&#8217; balance. Also, the block reward is added to the miner. Then the same transactions are run again by every participating node in the network to achieve consensus.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478856' \/><div class='watu-question-choice'><input type='radio' name='answer-116119[]' id='answer-id-478856' class='answer answer-31  answerof-116119' value='478856' \/>&nbsp;<label for='answer-id-478856' id='answer-label-478856' class=' answer label-31'><span class='answer'>a list of transactions is incorporated in that block. Gas used during the execution is attached to the executing contracts while the block reward is automatically spread across the mining pool to ensure a fair spread. Consensus is reached by a special form of hash code.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType31' value='radio' class=''><\/div><div class='watu-question' id='question-32'><div class='question-content'><p><span class='watu_num'>32. <\/span>A Blockchain Node:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116120' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478857' \/><div class='watu-question-choice'><input type='radio' name='answer-116120[]' id='answer-id-478857' class='answer answer-32  answerof-116120' value='478857' \/>&nbsp;<label for='answer-id-478857' id='answer-label-478857' class=' answer label-32'><span class='answer'>can never become a mining node.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478858' \/><div class='watu-question-choice'><input type='radio' name='answer-116120[]' id='answer-id-478858' class='answer answer-32  answerof-116120' value='478858' \/>&nbsp;<label for='answer-id-478858' id='answer-label-478858' class=' answer label-32'><span class='answer'>can always become a mining node.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478859' \/><div class='watu-question-choice'><input type='radio' name='answer-116120[]' id='answer-id-478859' class='answer answer-32  answerof-116120' value='478859' \/>&nbsp;<label for='answer-id-478859' id='answer-label-478859' class=' answer label-32'><span class='answer'>can become a mining node, depending if the implementation has the functionality implemented.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType32' value='radio' class=''><\/div><div class='watu-question' id='question-33'><div class='question-content'><p><span class='watu_num'>33. <\/span>On a consortium network:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116121' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478860' \/><div class='watu-question-choice'><input type='radio' name='answer-116121[]' id='answer-id-478860' class='answer answer-33  answerof-116121' value='478860' \/>&nbsp;<label for='answer-id-478860' id='answer-label-478860' class=' answer label-33'><span class='answer'>everybody can become a miner, everybody can send transactions and everything is public.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478861' \/><div class='watu-question-choice'><input type='radio' name='answer-116121[]' id='answer-id-478861' class='answer answer-33  answerof-116121' value='478861' \/>&nbsp;<label for='answer-id-478861' id='answer-label-478861' class=' answer label-33'><span class='answer'>usually only a few selected nodes can be miners. Transactions can be further limited.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType33' value='radio' class=''><\/div><div class='watu-question' id='question-34'><div class='question-content'><p><span class='watu_num'>34. <\/span>The JSON-RPC Protocol:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116122' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478862' \/><div class='watu-question-choice'><input type='radio' name='answer-116122[]' id='answer-id-478862' class='answer answer-34  answerof-116122' value='478862' \/>&nbsp;<label for='answer-id-478862' id='answer-label-478862' class=' answer label-34'><span class='answer'>is used to communicate between blockchain nodes.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478863' \/><div class='watu-question-choice'><input type='radio' name='answer-116122[]' id='answer-id-478863' class='answer answer-34  answerof-116122' value='478863' \/>&nbsp;<label for='answer-id-478863' id='answer-label-478863' class=' answer label-34'><span class='answer'>is used to ensure safe communication between miners.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478864' \/><div class='watu-question-choice'><input type='radio' name='answer-116122[]' id='answer-id-478864' class='answer answer-34  answerof-116122' value='478864' \/>&nbsp;<label for='answer-id-478864' id='answer-label-478864' class=' answer label-34'><span class='answer'>is a mean of dumping the blockchain data in a so-called consensus export.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478865' \/><div class='watu-question-choice'><input type='radio' name='answer-116122[]' id='answer-id-478865' class='answer answer-34  answerof-116122' value='478865' \/>&nbsp;<label for='answer-id-478865' id='answer-label-478865' class=' answer label-34'><span class='answer'>is used to communicate between the blockchain node and externally running applications.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType34' value='radio' class=''><\/div><div class='watu-question' id='question-35'><div class='question-content'><p><span class='watu_num'>35. <\/span>GETH:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116123' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478866' \/><div class='watu-question-choice'><input type='radio' name='answer-116123[]' id='answer-id-478866' class='answer answer-35  answerof-116123' value='478866' \/>&nbsp;<label for='answer-id-478866' id='answer-label-478866' class=' answer label-35'><span class='answer'>is the reference implementation of the Ethereum protocol and every other node implementation internally uses the closed-source from Geth.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478867' \/><div class='watu-question-choice'><input type='radio' name='answer-116123[]' id='answer-id-478867' class='answer answer-35  answerof-116123' value='478867' \/>&nbsp;<label for='answer-id-478867' id='answer-label-478867' class=' answer label-35'><span class='answer'>is the library that is used for the blockchain node Go-Ethereum. It is also used by Parity is parts, because it&#8217;s closed source.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478868' \/><div class='watu-question-choice'><input type='radio' name='answer-116123[]' id='answer-id-478868' class='answer answer-35  answerof-116123' value='478868' \/>&nbsp;<label for='answer-id-478868' id='answer-label-478868' class=' answer label-35'><span class='answer'>is one of the many blockchain nodes that implement the Ethereum Protocol. It&#8217;s open source and everyone can contribute.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType35' value='radio' class=''><\/div><div class='watu-question' id='question-36'><div class='question-content'><p><span class='watu_num'>36. <\/span>To store almost all data in the Ethereum Blockchain:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116124' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478869' \/><div class='watu-question-choice'><input type='radio' name='answer-116124[]' id='answer-id-478869' class='answer answer-36  answerof-116124' value='478869' \/>&nbsp;<label for='answer-id-478869' id='answer-label-478869' class=' answer label-36'><span class='answer'>a Linked List with pointers to previous blocks hashes is used.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478870' \/><div class='watu-question-choice'><input type='radio' name='answer-116124[]' id='answer-id-478870' class='answer answer-36  answerof-116124' value='478870' \/>&nbsp;<label for='answer-id-478870' id='answer-label-478870' class=' answer label-36'><span class='answer'>a Merkle Patricia Trie is used.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478871' \/><div class='watu-question-choice'><input type='radio' name='answer-116124[]' id='answer-id-478871' class='answer answer-36  answerof-116124' value='478871' \/>&nbsp;<label for='answer-id-478871' id='answer-label-478871' class=' answer label-36'><span class='answer'>a Radix Trie is used because the Merkle Patricia Trie is too inefficient.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType36' value='radio' class=''><\/div><div class='watu-question' id='question-37'><div class='question-content'><p><span class='watu_num'>37. <\/span>You interact with a smart contract and see a gas usage of 50,000 gas with a gas cost of 15Gwei.<br \/>\n<br \/>How much Ether would you have to pay to the miner?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116125' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478872' \/><div class='watu-question-choice'><input type='radio' name='answer-116125[]' id='answer-id-478872' class='answer answer-37  answerof-116125' value='478872' \/>&nbsp;<label for='answer-id-478872' id='answer-label-478872' class=' answer label-37'><span class='answer'>750,000,000,000,000 Wei<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478873' \/><div class='watu-question-choice'><input type='radio' name='answer-116125[]' id='answer-id-478873' class='answer answer-37  answerof-116125' value='478873' \/>&nbsp;<label for='answer-id-478873' id='answer-label-478873' class=' answer label-37'><span class='answer'>750,000,000,000 Wei<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478874' \/><div class='watu-question-choice'><input type='radio' name='answer-116125[]' id='answer-id-478874' class='answer answer-37  answerof-116125' value='478874' \/>&nbsp;<label for='answer-id-478874' id='answer-label-478874' class=' answer label-37'><span class='answer'>750,000,000 Wei<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478875' \/><div class='watu-question-choice'><input type='radio' name='answer-116125[]' id='answer-id-478875' class='answer answer-37  answerof-116125' value='478875' \/>&nbsp;<label for='answer-id-478875' id='answer-label-478875' class=' answer label-37'><span class='answer'>A flat fee of 1 Ether<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType37' value='radio' class=''><\/div><div class='watu-question' id='question-38'><div class='question-content'><p><span class='watu_num'>38. <\/span>Checking the balance of an address inside a loop of a smart contract constantly:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116126' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478876' \/><div class='watu-question-choice'><input type='radio' name='answer-116126[]' id='answer-id-478876' class='answer answer-38  answerof-116126' value='478876' \/>&nbsp;<label for='answer-id-478876' id='answer-label-478876' class=' answer label-38'><span class='answer'>doesn&#8217;t cost any gas.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478877' \/><div class='watu-question-choice'><input type='radio' name='answer-116126[]' id='answer-id-478877' class='answer answer-38  answerof-116126' value='478877' \/>&nbsp;<label for='answer-id-478877' id='answer-label-478877' class=' answer label-38'><span class='answer'>cost gas every time we check the balance.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType38' value='radio' class=''><\/div><div class='watu-question' id='question-39'><div class='question-content'><p><span class='watu_num'>39. <\/span>Gas costs accrue on sending a transaction:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116127' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478878' \/><div class='watu-question-choice'><input type='radio' name='answer-116127[]' id='answer-id-478878' class='answer answer-39  answerof-116127' value='478878' \/>&nbsp;<label for='answer-id-478878' id='answer-label-478878' class=' answer label-39'><span class='answer'>no matter the content.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478879' \/><div class='watu-question-choice'><input type='radio' name='answer-116127[]' id='answer-id-478879' class='answer answer-39  answerof-116127' value='478879' \/>&nbsp;<label for='answer-id-478879' id='answer-label-478879' class=' answer label-39'><span class='answer'>only with a new smart contract deployment.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478880' \/><div class='watu-question-choice'><input type='radio' name='answer-116127[]' id='answer-id-478880' class='answer answer-39  answerof-116127' value='478880' \/>&nbsp;<label for='answer-id-478880' id='answer-label-478880' class=' answer label-39'><span class='answer'>only interacting with an already deployed smart contract.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType39' value='radio' class=''><\/div><div class='watu-question' id='question-40'><div class='question-content'><p><span class='watu_num'>40. <\/span>EVM assembly:<\/p>\n<\/div><input type='hidden' name='question_id[]' value='116128' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478881' \/><div class='watu-question-choice'><input type='radio' name='answer-116128[]' id='answer-id-478881' class='answer answer-40  answerof-116128' value='478881' \/>&nbsp;<label for='answer-id-478881' id='answer-label-478881' class=' answer label-40'><span class='answer'>is much better than Solidity and a viable alternative.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478882' \/><div class='watu-question-choice'><input type='radio' name='answer-116128[]' id='answer-id-478882' class='answer answer-40  answerof-116128' value='478882' \/>&nbsp;<label for='answer-id-478882' id='answer-label-478882' class=' answer label-40'><span class='answer'>can be split across multiple files, but every contract must be in a file with the same name as the contract itself.<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='478883' \/><div class='watu-question-choice'><input type='radio' name='answer-116128[]' id='answer-id-478883' class='answer answer-40  answerof-116128' value='478883' \/>&nbsp;<label for='answer-id-478883' id='answer-label-478883' class=' answer label-40'><span class='answer'>is another language similar to LLL, more secure than Solidity.<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType40' value='radio' class=''><\/div><div style='display:none' id='question-41'><br \/><div class='question-content'><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.dumpsbase.com\/freedumps\/wp-content\/plugins\/watu\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading ...\" title=\"Loading ...\" \/>&nbsp;Loading &#8230;<\/div><\/div><br \/>\n<input type=\"button\" name=\"action\" onclick=\"Watu.submitResult()\" id=\"action-button\" value=\"Submit\"  class=\"watu-submit-button\" \/>\n<input type=\"hidden\" name=\"no_ajax\" value=\"0\"><input type=\"hidden\" name=\"quiz_id\" value=\"2023\" \/>\n<input type=\"hidden\" id=\"watuStartTime\" name=\"start_time\" 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