AB-400 (formerly PL-400) Power Platform Developer Practice Test

The AB-400 (formerly PL-400) Power Platform Developer Practice Test is a free intermediate-level, 20-minute skill test from Science of Apps. It tests readiness for Microsoft's Power Platform Developer Associate exam — AB-400, which replaced PL-400 when it retired on 30 October 2026 — covering solution architecture and ALM, extending the user experience with client scripting, PCF components and code apps, extending the platform with Dataverse plug-ins, Web API, Azure Functions, flows and agents, and integrations through events, data synchronisation and custom connectors. Written to the official AB-400 study guide and Dataverse and Power Apps developer documentation for 2026. Independent practice; not affiliated with Microsoft. Score 70% or more on its 20 questions to earn a verifiable Power Platform Developer Readiness certificate (SOA-P400). Every question is based on published standards and research — including Study guide for Exam AB-400: Extending Microsoft Power Platform Solutions with Code and AI (Microsoft Learn), Dataverse developer guide (plug-ins, Web API, custom APIs) (Microsoft Learn), Model-driven apps developer guide (Client API, PCF) (Microsoft Learn) — and each answer is explained with its source.

Yes. Science of Apps has a free AB-400 (formerly PL-400) Power Platform Developer Practice Test built on the current Microsoft exam outline for 2026 and 2027. It covers solution architecture and ALM, extending the user experience, extending the platform and integrations, scores you instantly and issues a verifiable certificate.

Read the four skill areas on this page, then take the 20-minute test online — no fee, course or sign-up. You see every answer explained when you finish. Score 70% or more and you get a Power Platform Developer Readiness certificate straight away, on screen, as a PDF and by email, with a credential ID anyone can verify.

Yes. The questions are original scenarios written by Science of Apps, and each one is based on a public source you can read: Study guide for Exam AB-400: Extending Microsoft Power Platform Solutions with Code and AI (Microsoft Learn); Dataverse developer guide (plug-ins, Web API, custom APIs) (Microsoft Learn); Model-driven apps developer guide (Client API, PCF) (Microsoft Learn); Application lifecycle management with Microsoft Power Platform (Microsoft Learn). The source is shown under each question and linked in the answer review. Science of Apps doesn't copy questions from other tests.

Four skill areas with five questions each, drawn from a bank of 10 per area so a retake brings new questions: Solution Architecture and ALM (Technical design, Table types and security and Solutions and deployment); Extending the User Experience (Client scripting, PCF components and Code apps); Extending the Platform (Plug-ins, Web API and SDK and Flows, Azure Functions and agents); Integrations (Dataverse events, Data synchronisation and Custom connectors). Every question is an original scenario written to the 2026–2027 standard, with the published source named under it.

Power Platform developer, Dynamics 365 or Dataverse developer, Solution architect for Power Platform, Low-code developer moving into pro-code and Integration developer. It suits anyone who wants a quick, verifiable way to show PL-400 knowledge in 2026 and 2027, from students and career switchers to experienced professionals.

No. Microsoft retired Exam PL-400 on 30 October 2026. The Microsoft Certified: Power Platform Developer Associate is now earned through Exam AB-400, Extending Microsoft Power Platform Solutions with Code and AI, which keeps the core developer skills and adds code apps, AI agents and MCP integration.

Building Power Platform solutions and ALM (15–20%), extending the user experience (25–30%), extending Power Platform with plug-ins, APIs, Azure Functions, flows and Foundry agents (35–40%), and developing integrations (10–15%). A score of 700 or more is needed to pass.

No. It is an independent practice test written to the publicly available PL-400 content outline for 2026 and 2027, for checking your readiness before you book the real exam. Passing earns a Science of Apps certificate rather than the official credential.

Yes. The test is online, in English and free everywhere — people take it from India, the US, the UK, Europe, Africa, Latin America and Asia-Pacific. Your certificate is dated with your own local date and can be verified from anywhere at scienceofapps.com/certification/verify/.

20 questions — 5 from each of 4 skill areas — with a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

We rate it Intermediate: assumes hands-on experience in the role. It has 20 scenario questions — 5 from each of 4 skill areas — and a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

Nothing. There is no fee to take a test, to receive the certificate, to have it emailed or to verify it, and no sign-up.

On our server, not in your browser. The answers never reach the page until you submit, so a certificate can only be earned by passing. Each certificate gets a unique credential ID stored by Science of Apps.

You see your score for each area and every question with the correct answer and why, with the published source behind it. You can retake after 30 minutes, and the retake draws questions you haven't seen yet.

No. Every certificate is dated, so it always shows when you passed. Retake a test any time for a newer date or a higher score.

Yes. After you pass, Add to LinkedIn opens the Licenses & certifications form with the certificate name, Science of Apps as the issuer, the issue date, your credential ID and the verification link filled in. You can also download it as a PDF or PNG, and it's emailed to you as a PDF.

Every certificate has a credential ID and a QR code. Scanning it, or entering the ID at scienceofapps.com/certification/verify/, shows the holder's name, the certification, the score and the issue date from our records.

No. They are Science of Apps' own assessments of applied skill. They aren't issued by a university or standards body, and they work best alongside a portfolio that shows the skills in real work.