AB-400 Practice Tests: A Smarter Way to Prepare for Your Extending Microsoft Power Platform Solutions with Code and AI Exam

Right study materials for AB-400 Extending Microsoft Power Platform Solutions with Code and AI exam can help you structure your study sessions, evaluate your progress, and identify the areas that need more attention. DumpsBase released AB-400 practice tests with 308 questions and answers, making you understand the relevant technologies, apply your knowledge to practical scenarios, and develop the confidence to handle assessment questions effectively.

PL-400 to AB-400: The Timeline and Differences Need Know

Microsoft has moved from PL-400: Microsoft Power Platform Developer to AB-400: Extending Microsoft Power Platform Solutions with Code and AI. The exam code and objectives have changed, but both exams lead to the same credential: Microsoft Certified: Power Platform Developer Associate. Existing certification holders do not need to take AB-400 because of the transition, the renewal process remains unchanged.

Timeline:

Date	What changes
October 16, 2026	PL-400 registration closes. AB-400 becomes available for new registrations.
Through October 30, 2026	Candidates who registered for PL-400 on or before October 16 can still schedule and take it.
October 30, 2026	PL-400 retires. Candidates taking a later exam should prepare for AB-400.

Differences:

Area	PL-400	AB-400
Exam structure	Six skill areas, with technical design, Dataverse and Power Apps listed separately	Four broader skill areas
User experience	10-15%	25-30%, including Power Apps code apps
Platform extension	35-40%	35-40%, with explicit coverage of AI and agent integration
Integrations	5-10%	10-15%
AI in the candidate profile	Agentic AI was not explicitly named	Generative AI, Microsoft Foundry and Copilot Studio are explicitly included

Build Exam Confidence with Microsoft AB-400 Practice Tests

DumpsBase provides AB-400 practice tests designed to support a more organized exam preparation process. We will give you an opportunity to apply what you have learned in a structured testing environment. Rather than relying entirely on reading and memorization, you can work through practice questions, evaluate your answers, and become more comfortable analyzing different question scenarios.

Regular practice also helps you recognize how technical concepts may be tested and identify which topics require additional review. For the best results, combine practice sessions with the most current AB-400 exam objectives. This approach builds familiarity with the subject matter while helping you develop a more effective preparation routine.

Try 5 Free Demo Questions

Question 1

A developer created a parent and a manually triggered child directly in the same Power Automate solution in Development, then exported the solution and imported it into Test. A separate imported parent calls an equivalent HTTP-triggered worker using a copied URL. A Test instance of that worker is available, and its URL is known.
Neither call was edited after import.
Validation shows:

Call	Configuration after import	Observed destination
Run a Child Flow	Imported child selected	Test child
HTTP	Literal Development worker URL	Development worker

Which change should the developer make so both calls reach their intended Test implementations?
A. Reselect the Test child in Run a Child Flow and retain the HTTP action’s existing URI.
B. Replace the HTTP action’s URI with the Test worker URL and retain the imported Run a Child Flow selection.
C. Reimport the same solution package and retain both calls’ existing configurations.
D. Use Test credentials for the HTTP action and retain its existing URI and the imported child selection.
Answer: B
Explanation: Exporting and importing the solution automatically links the new parent and child when using the documented child-flow pattern. The observed Test child run confirms that this linkage is working. The HTTP action instead still contains the Development worker’s literal URL, and its trace confirms that destination. Updating that URI to the available Test worker URL fixes the observed mismatch. Reimporting the same package without changing the HTTP URI does not address the configuration shown.

• A — Incorrect: The child selection already invokes the Test child. Reselecting it leaves the HTTP action’s Development destination unchanged.
• B — Correct: The HTTP action’s literal URI is the configuration responsible for the observed Development request. Replacing it with the Test worker URL fixes that route while preserving the working imported child linkage.
• C — Incorrect: The parent-child linkage already works. Reimporting the same package with the same HTTP URI does not correct the Development endpoint stored in that action.
• D — Incorrect: Credentials concern authentication to the addressed endpoint. Changing credentials while retaining the Development URI does not select the Test worker.

Question 2

A developer runs a long Dataverse export in a queue-triggered Azure Function on the Premium plan. The app uses an unbounded execution timeout. The developer claims that, once an invocation starts, this setting guarantees the same worker process will run until the export finishes, including during scale-in and platform updates.
Which assessment of this claim is accurate?
A. The claim is valid; an unbounded execution timeout also removes scale-in and platform-update grace limits.
B. The claim is invalid; Premium still enforces a 30-minute execution maximum when the timeout is unbounded.
C. The claim is invalid; queue-triggered execution has a 230-second limit even with an unbounded timeout.
D. The claim is invalid; execution timeout is unbounded, but 60-minute scale-in grace and 10-minute platform-update grace still apply.
Answer: D
Explanation: An unbounded Premium execution timeout removes the enforced maximum execution duration; it does not guarantee that one worker process remains uninterrupted. The documented grace periods are 60 minutes during Premium scale-in and 10 minutes during platform updates. Long work still needs a recovery strategy for hosting interruptions. The 30-minute value is Premium’s default timeout, while the 230-second limit concerns HTTP responses and does not impose that duration on this queue-triggered execution.

• A — Incorrect: Execution timeout and hosting lifecycle limits are separate. Choosing an unbounded timeout does not remove the documented grace periods.
• B — Incorrect: Premium’s 30-minute value is the default timeout, not an enforced maximum when unbounded execution is configured.
• C — Incorrect: The 230-second restriction is an HTTP response limit. Applying it as an execution limit to a queue trigger misuses its scope.
• D — Correct: This preserves the documented unbounded execution timeout while retaining Premium’s finite scale-in and platform-update grace periods.

Question 3

An Order table has two model-driven app forms: Dispatch and Service. Both contain Delivery Method and Courier Instructions.
On the Dispatch form, Courier Instructions must appear when Delivery Method is Courier and disappear when it is Collection. Visibility must change during editing, before the user saves the row. On the Service form, Courier Instructions must remain visible for either delivery method.
This requirement does not change stored values or validation for API and import callers.
Which implementation should you choose for the visibility logic?
A. Use a synchronous Dataverse plug-in registered in PreOperation for the Order table’s Update message.
B. Use a business rule on the Order table with its scope set to the Dispatch form.
C. Use a business rule on the Order table with its scope set to All Forms.
D. Use a Power Automate cloud flow triggered when an Order row is modified.
Answer: B
Explanation: The requirement concerns field visibility during editing, using values that have not yet been saved. A business rule scoped to the Dispatch form supports this client interaction and limits it to the intended form. Scoping the rule to All Forms would also change the Service form. Server processing triggered by a row update cannot provide the required response to unsaved form edits.

• A — Incorrect: PreOperation runs when Dataverse processes an Update request. Running before the database write does not make a plug-in respond to unsaved field edits or control field visibility on an open form.
• B — Correct: Form-scoped business rules support showing and hiding fields. Selecting the Dispatch form as the scope provides the requested interaction without changing visibility on the Service form.
• C — Incorrect: All Forms scope would apply the visibility behavior to both forms. It meets the interaction requirement but violates the requirement that Courier Instructions remain visible on the Service form.
• D — Incorrect: The row-modification trigger depends on a Dataverse update. It does not respond to unsaved form edits or directly control the open form’s field visibility.

Question 4

A developer is designing a reusable PCF text editor for model-driven forms on different Dataverse tables. Makers must map Value to the single-line text column that users edit and configure Hint as display-only text. The draft manifest declares both properties as SingleLine.Text with usage=”input”. Rendering incoming host values already works. User edits must be returned to the hosting form through the component interface.
Which design should the developer use?
A. Keep Value and Hint as input properties; after edits, call notifyOutputChanged and return the edited Value from getOutputs.
B. Make Value bound and keep Hint as input; after edits, call notifyOutputChanged and return the edited Value from getOutputs.
C. Make Value bound and keep Hint as input; after edits, call notifyOutputChanged and return the edited Value from updateView.
D. Make Value bound and keep Hint as input; write edits into context.parameters.Value.raw so the host reads them during its next updateView call.
Answer: B
Explanation: Value represents a column the component can change, so it needs bound usage; Hint is read-only configuration and remains input. After an edit, notifyOutputChanged tells the framework to retrieve the new value through getOutputs, using the manifest property name. Keeping Value as input does not establish the editable-column contract.

• A — Incorrect: Input usage describes read-only data. Calling the output notification callback does not make Value an editable bound column.
• B — Correct: The manifest separates the editable column from display configuration, and the implementation uses the framework’s notification and output-retrieval contract.
• C — Incorrect: The property directions fit, but updateView receives host changes and updates the display. The framework retrieves component outputs through getOutputs.
• D — Incorrect: Mutating an incoming context value does not implement the documented output handoff. The component must notify the framework and supply the edited value through getOutputs.

Question 5

A custom connector needs two designer behaviors. First, a project ID input must offer IDs and labels returned by a ListProjects operation. Second, after a project is selected, the request body must expose that project’s fields returned as a schema by DescribeProjectFields.
Which extension families match the two behaviors?
A. Use x-ms-dynamic-values /x-ms-dynamic-list for the project choices, and x-ms-dynamic-schema /x-ms-dynamic-properties for the request fields.
B. Use x-ms-dynamic-schema /x-ms-dynamic-properties for the project choices, and x-ms-dynamic-values /x-ms-dynamic-list for the request fields.
C. Use x-ms-summary for the project choices, and x-ms-visibility for the request fields.
D. Use x-ms-dynamic-values /x-ms-dynamic-list for both the project choices and the shape of the request object.
Answer: A
Explanation: Dynamic values and lists supply selectable parameter values. Dynamic schema and properties discover the shape of a parameter or response and expose the corresponding fields. A choice of project and the shape of that project’s request body are different designer requirements.

• A — Correct: The first family populates ID and label choices from an operation. The second discovers the selected project’s schema so the designer can expose its fields.
• B — Incorrect: It exchanges the roles. A list of IDs is not the schema of the request object, and a value list does not define that object’s fields.
• C — Incorrect: Summary metadata provides a label, and visibility controls presentation. Neither calls the operations to obtain dynamic choices or field schemas.
• D — Incorrect: The dynamic list can populate the project input, but discovering request properties requires the schema/properties family rather than another list of candidate values.

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Preparing for the Microsoft AB-400 exam is more manageable when you have a clear study plan and reliable ways to measure your progress. Microsoft AB-400 practice tests from DumpsBase can help you review important concepts, identify areas for improvement, and develop a more consistent preparation routine.

Start by reviewing the official exam objectives, strengthen your technical knowledge, and use the Microsoft AB-400 practice tests to assess your readiness. With focused study and consistent review, you can approach your Microsoft Certified: Power Platform Developer Associate certification journey with greater confidence and a clearer understanding of the areas that need attention.