Updated for 2026 Exam Objectives

MB-820 Practice Test

Microsoft Dynamics 365 Business Central Developer

MB-820 tests whether you can actually build and extend pages, tables, reports, and codeunits in AL, debug and deploy an extension in Visual Studio Code, and wire up REST and OData integrations — not just recognize Business Central terminology.

Our 500 scenario-based questions cover the full MB-820 blueprint across six domains: describing Business Central (architecture, the base app versus system app, the core solution and extensions approach, the update lifecycle, online versus on-premises differences, and bringing an app to AppSource), installing, developing, and deploying for Business Central (setting up the development environment, managing configuration files and multiple AL extensions in one workspace, debugging with Visual Studio Code, deploying an extension, and managing multilanguage development), developing by using AL objects (the largest domain, covering building and extending pages including Role Center pages and page types, tables, and enums, building and extending reports including report layouts, document reports, multilanguage support, triggers, and the report request page, designing and configuring XMLports, developing codeunits with events, triggers, and interfaces, creating installation and upgrade codeunits, creating and troubleshooting permission sets, and building queries that link, filter, and aggregate data), developing by using AL (customizing the UI and onboarding experience with profiles, views, teaching tips, and onboarding checklists, applying essential development standards including the data process model and document standards, and writing AL code with custom procedures, data types, expressions, built-in functions, variables, error handling, and access modifiers), working with development tools (running semiautomated tests with the Test Toolkit and test codeunits, and monitoring, configuring, and creating custom telemetry signals), and integrating Business Central with other applications (accessing REST services with HTTP classes and JSON, and implementing APIs including OData bound and unbound actions and Read Scale-Out). Every question is grounded against live Microsoft Learn Business Central developer documentation.

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Is this for you?

Your MB-820 exam is in the next 2-4 weeks
You've studied the concepts but aren't sure you'll pass
You want questions harder than the real exam
You want to understand why answers are correct, not just memorize

This is NOT for you if:

You're looking for braindumps or exam leaks
You haven't started studying the concepts yet
Most successful candidates start practice 2-3 weeks before their exam
Updated for the latest exam blueprint

MB-820 Exam Details

What to expect on exam day

Questions

40

Duration

100 minutes

Passing Score

700

Exam Cost

$165

Exam Domains Covered

Master all topics tested on the MB-820 exam

1

Describe Business Central

2

Install, develop, and deploy for Business Central

3

Develop by using AL objects

4

Develop by using AL

5

Work with development tools

6

Integrate Business Central with other applications

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5 Free MB-820 Questions

See how ready you are for the MB-820 exam. Each question includes a detailed explanation so you learn as you go.

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Why Practice with MSCertQuiz?

Microsoft Learn teaches concepts. We prepare you for the actual exam.

1

Deep coverage of AL object development most generic Dynamics 365 question banks reduce to syntax trivia — page and table extension patterns, codeunit events and interfaces, and installation and upgrade codeunits

2

Real deployment and tooling scenarios covering Visual Studio Code debugging, multi-extension workspace configuration, and the Test Toolkit for semiautomated testing, matching how Business Central developers actually build and ship extensions

3

Full integration content most competitors underweight: REST services with HTTP classes and JSON, and API development including OData bound and unbound actions and Read Scale-Out for performance

4

Every question verified against live Microsoft Learn Business Central developer documentation before it ships, so content stays accurate as AL tooling and the extension model keep evolving

Not sure if you're ready for the MB-820 exam?

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What Our Users Say

“I've written AL extensions for a couple of years but had never carefully compared event subscribers against table extensions side by side. The codeunit and interface questions closed real gaps. Passed on my first attempt.”

FS

Filip S.

MB-820 Certified

“The XMLport and API/OData questions were way more detailed than I expected from a practice test, and matched the real exam almost exactly.”

MA

Mira A.

Business Central AL Developer

“As someone who mostly builds pages and reports, the telemetry and Test Toolkit questions filled real gaps between what I knew and what the exam actually tests.”

TB

Tobias B.

Passed MB-820 first try

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Official Microsoft Resources

Our practice questions are aligned with official Microsoft exam objectives. We recommend studying with Microsoft Learn first, then using MSCertQuiz to test your readiness.

View Official MB-820 Exam Details

MB-820 Frequently Asked Questions

Everything you need to know about the MB-820 Business Central Developer certification

What is MB-820?
MB-820 (Microsoft Dynamics 365 Business Central Developer) is a certification validating the ability to design, develop, and deploy AL extensions for Business Central, covering the extension architecture, AL object development, essential development standards, testing and telemetry, and integrating Business Central with external systems.
How much does the MB-820 exam cost and how long is it?
The MB-820 exam costs $165 USD, runs approximately 100 minutes, and has a passing score of 700 out of 1000. Confirm current pricing and duration on the official certification page before booking, since exam details can shift alongside Business Central platform updates.
What is the passing score for MB-820?
The passing score for MB-820 is 700 out of 1000, the same threshold used across nearly all Microsoft role-based certification exams. Scoring is scaled, so 700 represents roughly 70% competency spread across all six exam domains rather than a simple raw percentage.
What topics are covered on MB-820?
MB-820 covers six domains: Describe Business Central (10-15%) — architecture and the extensions approach; Install, develop, and deploy for Business Central (10-15%) — dev environment and Visual Studio Code debugging; Develop by using AL objects (35-40%, the largest domain) — pages, tables, reports, XMLports, codeunits, permission sets, and queries; Develop by using AL (15-20%) — UI customization, development standards, and AL language fundamentals; Work with development tools (10-15%) — the Test Toolkit and telemetry; and Integrate Business Central with other applications (10-15%) — REST services and APIs.
How hard is MB-820?
MB-820 is a code-heavy exam that expects real hands-on AL development experience in Visual Studio Code, not just familiarity with the Business Central user interface. Candidates comfortable with basic page and table extensions often find the codeunit events, interfaces, and installation/upgrade codeunit questions in the develop-by-using-AL-objects domain the hardest, since they require deeper understanding of the extension execution model.
How long should I study for MB-820?
Candidates already developing AL extensions for Business Central should plan 5-7 weeks, focused on the develop-by-using-AL-objects domain given its exam weight. Candidates newer to AL and the extension model should plan 10-12 weeks and should build hands-on familiarity with Visual Studio Code, the AL Language extension, and a Business Central sandbox environment first. We recommend working through Microsoft Learn's MB-820 learning path, then practicing with 500 scenario-based questions spread across all six domains in proportion to their exam weight.
What are the prerequisites for MB-820?
There are no enforced prerequisites to register for MB-820, but Microsoft recommends knowledge of Business Central functional areas and hands-on experience developing AL extensions, including Visual Studio Code, the AL Language extension, and Azure DevOps or GitHub for source control.
Who should take MB-820?
MB-820 is aimed at developers who design, build, and deploy AL extensions for Business Central to meet business requirements, working with functional consultants and solution architects to implement customizations and integrations. It pairs well with MB-800 (Business Central Functional Consultant) for candidates who need both functional and developer coverage of Business Central, and with PL-400 (Power Platform Developer) for those extending Business Central with Power Platform components.

Also Preparing For

Candidates studying MB-820 often prepare for these certifications next.

MB-800

Dynamics 365

Practice test →MB-500

Finance & Operations

Practice test →PL-400

Power Platform

Practice test →