131 practice questions for Dynamics 365 Business Central Developer (MB-820), with full explanations.
Every question comes with the correct answer, the reasoning behind it, and a short note on why each wrong option is wrong. Work through it once with the answers, then again with the questions-only copy under exam conditions.
- 131 questions mapped to the MB-820 exam objectives
- Answers and explanations for every question, including the wrong options
- A questions-only PDF for timed practice runs
- Instant delivery by email the moment you check out
- Free monthly updates for as long as the exam is live
- Pass or your money back
An MB-820 attempt costs US$165 in the US. This pack is US$39, paid once.
Try 10 questions free before you buy.
Last updated September 2026 · 131 questions
What makes the MB-820 hard
MB-820 is the AL exam, and it rewards candidates who have shipped an extension rather than just read about one. Microsoft’s June 2025 refresh left the weighting alone but rewrote the API section, so OData bound and unbound actions and Read Scale-Out are now explicitly in scope alongside the HTTP and JSON classes.
Develop by using AL objects is over a third of the exam: Role Center pages and page types, table and enum extensions, report substitution and layouts, document reports, request pages and processing-only reports, XMLports and their node properties, codeunits with events, triggers, interfaces and install and upgrade codeunits, permission sets and entitlements with inherent permissions, and query objects for joins, filters and aggregation.
The AL language domain adds profiles and views in code, the user assistance model, assisted setup, teaching tips, in-app tours and onboarding checklists, plus the data process model, functional table types, document and master data patterns, error handling and access modifiers. Tools covers the Test Toolkit and test codeunits, and telemetry configuration with custom signals. The describe and deploy domains are lighter but expect knowledge of base app versus system app, the AppSource process, multi-extension workspaces and multilanguage development.
About the exam
MB-820 (Microsoft Dynamics 365 Business Central Developer) leads to the Dynamics 365 Business Central Developer Associate credential. It covers Business Central architecture and apps, the development environment and extension deployment, AL objects including pages, tables, reports, XMLports, codeunits, permission sets and queries, AL language and UI customisation, testing and telemetry, and REST and API integration. Associate level, no prerequisites. Skills measured as of 10 June 2025.
Exam domains
- Describe Business Central: 10 to 15%
- Install, develop, and deploy for Business Central: 10 to 15%
- Develop by using AL objects: 35 to 40%
- Develop by using AL: 15 to 20%
- Work with development tools: 10 to 15%
- Integrate Business Central with other applications: 10 to 15%
Passing score 700 out of 1000, US$165 in the US, priced by local currency elsewhere, online proctored or test centre, renews annually for free.
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