A plugin must create a task and update an opportunity. If the task creation fails, the opportunity update must not be saved. The plugin runs in the database stage. What should you use?

ExecuteMultipleRequest with ContinueOnError=false

ExecuteTransactionRequest with the two operations

Two separate service.Create and service.Update calls

Use the Web API batch with atomicity

A custom API endpoint must update a customer record and its related orders. The endpoint is called concurrently by multiple users. The business requires that no partial updates occur and that users are informed if the customer record changed since they loaded it. What is the best approach?

Use pessimistic locking on the customer record

Use optimistic concurrency on the customer record only

Use a transaction for the update and optimistic concurrency on the customer record

A developer needs to update 5,000 records in Dataverse. The records are independent and do not require any business logic to run. What is the most efficient approach?

Use a Web API $batch request with all 5,000 updates in one batch

Use a FetchXML bulk update via the Web API

Use the Organization service's ExecuteMultipleRequest with parallel execution

Send 5,000 individual Web API PATCH requests sequentially

A single-page application (SPA) uses the Dataverse Web API. The app needs to authenticate users interactively. Which OAuth flow should the SPA use?

Authorization code flow with PKCE

Resource owner password credentials flow

Two users are simultaneously updating the same field of a contact record. The organization wants to prevent lost updates. What should the developer implement?

Use a bulk update to overwrite the field

Use optimistic concurrency by sending the If-Match header with the original ETag

Use pessimistic locking by acquiring a database lock on the record

Use a transaction to lock the record during the update

Microsoft Certified:Power Platform Developer Associate

Domain 5Objective 3

Use Platform APIs PL-400 Practice Questions (Page 6)

Part of the Extend the platform domain, which accounts for 30–35% of the PL-400 exam. Microsoft does not publish an official question count, but from its 100-minute exam (~40–65 total, ~12–23 in this domain), expect 2–5 from this objective — we provide 42 practice questions to prepare you well beyond it. (estimate)

42questions here

9free pages

8concepts

30–35%of the exam

Questions 26–30

26application · medium
A plugin must create a task and update an opportunity. If the task creation fails, the opportunity update must not be saved. The plugin runs in the database stage. What should you use?
Select an answer first
27expert · hard
A custom API endpoint must update a customer record and its related orders. The endpoint is called concurrently by multiple users. The business requires that no partial updates occur and that users are informed if the customer record changed since they loaded it. What is the best approach?
Select an answer first
28application · medium
A developer needs to update 5,000 records in Dataverse. The records are independent and do not require any business logic to run. What is the most efficient approach?
Select an answer first
29application · medium
A single-page application (SPA) uses the Dataverse Web API. The app needs to authenticate users interactively. Which OAuth flow should the SPA use?
Select an answer first
30application · medium
Two users are simultaneously updating the same field of a contact record. The organization wants to prevent lost updates. What should the developer implement?
Select an answer first

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