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1. Why is MongoDB a NoSQL database?

2. What is the built-in database called local in MongoDB for?

3. Which cursor method should you use to specify the maximum number of documents returned?

4. What does it command do in the mongo shell?

5. Which of the following commands will delete a collection named restaurants?

6. Which cursor method should you use to force MongoDB to use a specific index for a query?

7. Given the following MongoDB URI: mongodb+srv://datascientist34:[email protected]/admin Which of the following statements are true? (select 2)

8. There are some special databases in MongoDB that we cannot use to create a new database. Select those names.

9. Given a companies collection where each document has the following structure:
{
_id: ObjectId('61a8b90c6d5ce6a7d8fef95e'),
name: 'Facebook',
tag_list: ['facebook', 'college', 'students', 'network'],
description: 'Social network'
}
Which of the following commands will add new fields to the updated documents?

10. Suppose you have a books collection with title field.
Which of the following queries will return all books with a title ending in 'ian'?

11. Given a companies collection where each document has the following structure:
{
_id: ObjectId("52cdef7c4bab8bd675297efd"),
name: 'ZoomInfo',
homepage_url: 'http://www.zoominfo.com',
blog_url: 'http://zoominfoblogger.wordpress.com/',
twitter_username: 'ZoomInfo',
founded_year: 2000,
email_address: ''
}
Extract all companies from this collection that have the same Twitter username as the company name.
Which query should you use?

12. Which of the following statements are true about the mongo shell? Check all that apply.

13. Suppose you insert the following documents into companies collection:
db.companies.insertMany([
{"_id": 1, "name": "Facebook"},
{"_id": 1, "name": "Twitter"},
{"_id": 2, "name": "Tesla"},
{"_id": 3, "name": "Amazon"}
], {"ordered": false})
Select all true statements about this operation. (select 3)

14. Which collection method do you need to use to drop a specific collection?

15. Select all true statements about the update operation. (select 2)

16. Suppose you have a sales collection with the following document structure:
{
_id: ObjectId("5bd761dcae323e45a93ccfe8"),
saleDate: ISODate("2015-03-23T21:06:49.506Z"),
items: [
{
name: 'printer paper',
tags: [ 'office', 'stationary' ],
price: Decimal128("40.01"),
quantity: 2
}
{
name: 'pens',
tags: [ 'writing', 'office', 'school', 'stationary' ],
price: Decimal128("56.12"),
quantity: 5
},
{
name: 'notepad',
tags: [ 'office', 'writing', 'school' ],
price: Decimal128("18.47"),
quantity: 2
}
],
storeLocation: 'Denver',
couponUsed: true,
purchaseMethod: 'Online'
}
Which operator should you use to extract all sales documents that have 'notepad' name in items field?

17. Suppose you have a developers collection with the following document structure:
{
_id: 1,
fname: 'Bob',
lname: 'Smith',
tech_stack: [ 'git', 'c++', 'sqlite', 'linux' ]
}
Select a query that can be executed without errors.

18. Which of the following commands will add a collection that is stored in BSON file to a MongoDB cluster?

19. In your database there is a movies collection with the following document structure:
{
_id: ObjectId("573a1390f29313caabcd42e8"),
genres: [ 'Short', 'Western' ],
title: 'The Great Train Robbery',
rated: 'TV-G',
year: 1903,
imdb: { rating: 7.4, votes: 9847, id: 439 },
countries: [ 'USA' ]
},
{
_id: ObjectId("573a1390f29313caabcd4323"),
genres: [ 'Short', 'Drama', 'Fantasy' ],
rated: 'UNRATED',
title: 'The Land Beyond the Sunset',
year: 1912,
imdb: { rating: 7.1, votes: 448, id: 488 },
countries: [ 'USA' ]
}
Which of the following queries will return only the title for the five oldest movies in this collection?

20. Given a movies collection where each document has the following structure:
{
_id: ObjectId('573a1390f29313caabcd60e4'),
genres: [ 'Short', 'Comedy', 'Drama' ],
title: 'The Immigrant',
year: 1917,
imdb: { rating: 7.8, votes: 4680, id: 8133 },
countries: [ 'USA' ]
}
Which of the following queries will find all movies that were made in 2000 or 2010?