AB-400 Power Platform Developer: 360 Practice Questions

This course contains the use of artificial intelligence.

Choosing a Power Platform extension is only the beginning. You also need to know which identity runs it, where a transaction ends, what a generated interface supports, and how to recover when a deployment or integration fails. These practice questions help you connect those implementation decisions to the AB-400 scope effective October 16, 2026.

Practice across the new developer scope

The course contains 360 original English questions in six tests. The first four provide focused practice; the final two combine the four domains in the published weighting ranges.

• Test 1 — Architecture, ALM and code-app foundations: 65 questions.
• Test 2 — Client scripting, PCF and code-app implementation: 65 questions.
• Test 3 — Dataverse plug-ins, APIs, Azure Functions and automation: 65 questions.
• Test 4 — MCP, connected agents, Work IQ business skills and integrations: 65 questions.
• Test 5 — Integrated design decisions: 50 questions.
• Test 6 — Diagnosis and recovery decisions: 50 questions.

Each answer option has feedback explaining why it fits or fails under the stated conditions. Overall explanations connect the correct choice to the requirement, and study tips identify the concept to revisit. Scenarios include managed solution layers, sparse updates, concurrency, throttling, component lifecycle, generated service contracts, OAuth boundaries and asynchronous outcomes. Preview-specific questions explicitly identify their preview context.

Use the tests to improve your reasoning

1. Attempt a focused test and record the constraints you overlooked.
2. Read the feedback for the alternatives as well as the correct answer.
3. Revisit the relevant Microsoft documentation and try the scenario in your own permitted development environment.
4. Take the integrated tests under their time limits, then review the reasoning behind each missed decision.

Focused tests use 130 minutes; integrated tests use 100 minutes. The 80% target is an author-set practice goal. The two 50-question tests are text-only mock-style practice, not a claim about AB-400's exact question count or format. Microsoft reports scaled scores; this practice percentage does not convert to the official passing score. The course does not simulate interactive labs.

This is independent exam preparation based on the published AB-400 scope, rather than a relabeled PL-400 package. It contains no official or recalled exam questions and offers no pass guarantee. It is not endorsed by Microsoft. AI assisted the creation of questions, explanations and the course image; the content was checked against the cited scope and technical documentation. This is a practice-question course, so it is best used alongside documentation and hands-on study.