Exam Name: Microsoft Dynamics 365 Business Central Developer
Certification Provider: Microsoft
Corresponding Certification: Microsoft Dynamics 365
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Microsoft MB-820 Exam Overview:
| Certification Vendor: | Microsoft |
|---|---|
| Exam Name: | Microsoft Dynamics 365 Business Central Developer |
| Exam Number: | MB-820 |
| Exam Format: | Drag and drop, Build list, Multiple choice, Active screen, Case studies |
| Real Exam Qty: | 40–60 |
| Exam Price: | $165 USD |
| Certificate Validity Period: | 1 year |
| Available Languages: | English |
| Exam Duration: | 90 minutes |
| Passing Score: | 700 (on a scale of 1–1000) |
| Recommended Training: | Microsoft Learn: Dynamics 365 Business Central Developer Learning Paths |
| Exam Registration: | Pearson VUE Microsoft Learn Exam Registration |
| Sample Questions: | DOWNLOAD DEMO |
| Exam Way: | Online proctored or onsite testing center |
| Pre Condition: | Recommended: 1–2 years experience developing Business Central solutions, familiarity with AL language, Visual Studio Code, and development lifecycle |
| Official Syllabus URL: | https://learn.microsoft.com/en-us/credentials/certifications/resources/study-guides/mb-820 |
Microsoft MB-820 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Describe Business Central | 10–15% | - Describe Business Central apps
- Differentiate online and on-premises features - Describe solution and extension approach - Describe components and capabilities - Describe Business Central architecture |
| Integrate Business Central with other applications | 10–15% | - Authentication and security for integration - Power Platform integration - External data connections - Use APIs and web services |
| Develop by using AL | 15–20% | - Error handling and logging - Performance optimization - Data manipulation and validation - Security and permissions - AL syntax and programming concepts |
| Work with development tools | 10–15% | - Visual Studio Code for AL development - Source control integration - Telemetry and diagnostics - AL Language extension |
| Develop by using AL objects | 35–40% | - Create pages and reports
- Design and create tables
|
| Install, develop, and deploy for Business Central | 10–15% | - Build and deploy extensions
|
What Working Candidates Ask About MB-820 Prep
Microsoft specifies the following prerequisites for the Microsoft Dynamics 365 Business Central Developer: Recommended: 1–2 years experience developing Business Central solutions, familiarity with AL language, Visual Studio Code, and development lifecycle.
Confirm the authoritative details on the official certification page before you register.
As of the latest information, the passing score for the MB-820 exam is 700 (on a scale of 1–1000) and the fee is $165 USD. Microsoft sets both, so verify the current figures on the official site before scheduling.
Written and dependable. If you fail the corresponding exam within 60 days of purchase, send us a scanned copy of your enrollment slip and your official Score Report PDF within two days of the exam date; verified claims are refunded in full within seven days. Exclusions: exams taken within three days of purchase, candidate names that differ from the payer, and free or expired products. Prefer to keep preparing? Exchange your product for two others of equal value at no charge.
The Microsoft Dynamics 365 Business Central Developer blueprint centers on these principal domains:
- Develop by using AL (15–20%)
- Install, develop, and deploy for Business Central (10–15%)
- Describe Business Central (10–15%)
Further domains complete the official outline, and our question bank spans every one.
By understanding the constraint first: most of our candidates are office workers, so the MB-820 bank is elaborately designed for efficiency — focused content with expert-verified answers across the Microsoft Dynamics 365 Business Central Developer objectives, no filler. Safety is engineered in too: payment runs through Credit Card, the world's reliable payment platform, safeguarding the transaction and protecting your interests, so you can buy without misgivings. And because an electronic product cannot be touched before purchase, a free trial download of real bank content lets you see it first — with 24/7 customer service agents ready for any contingency afterward.
Microsoft recommends these official training options:
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According to the latest exam information, the MB-820 exam includes 40–60 questions and lasts 90 minutes minutes. Practicing under the same limit builds the pacing confidence you will want on the day.
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Book your test center or online session early, and let a fixed date organize your preparation.
Microsoft Dynamics 365 Business Central Developer Sample Questions:
You are developing a test application to test the posting process of a sales order. You must provide the following implementation:
* Specify the value of post options (dialog: Ship, Invoice, Ship & Invoice) as Invoice.
* Perform calculations and values checking.
You need to complete the development of the test codeunit.
Which methods should you use? To answer, move the appropriate methods to the correct implementation.
You may use each method once, more than once, or not at all. You may need to move the split bar between panes or scroll to view content.
NOTE: Each correct selection is worth one point.
Correct Answer:
Explanation:
Handler
Test
You need to handle the removal of the Description field and the Clone procedure without breaking other extensions.
Which three actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.
NOTE: More than one order of answer choices is correct. You will receive credit for any of the correct orders you select.
Correct Answer:
Explanation:
In Business Central, when you need to handle the removal of fields and procedures to ensure that other extensions are not affected by these changes, you typically follow a two-step deprecation process. This allows other developers and users to adapt to the changes before they are fully enforced. Here are the steps to handle the removal:
* Mark as Obsolete : In the first version where the decision to remove the field or procedure is made, you set the ObsoleteState to Pending and provide an ObsoleteReason . This doesn ' t remove the feature but indicates to users and developers that it will be removed in the future. This step is crucial for backward compatibility.
* Removal : In a subsequent version, after users have had time to adapt to the deprecation warning, you can then remove the field or procedure or set the ObsoleteState to Removed .
Based on these guidelines, here are the three actions you should perform in sequence:
* Set the Description field as ObsoleteState = Pending and ObsoleteReason = ' Not in use ' in version
2.0.0.0.
* Set the Clone procedure as ObsoleteState = Pending and ObsoleteReason = ' Not in use ' in version
2.0.0.0.
* Remove the Description field from the Issue table in version 2.0.0.1.
These steps will ensure that anyone using the Description field or Clone procedure will receive a warning about the pending deprecation before it is actually removed, thereby minimizing the impact on other extensions and providing a clear path for migration.
When handling the removal of fields and procedures in Microsoft Dynamics 365 Business Central, the process should be carried out in a way that allows other extensions or dependent features to adapt to the changes without causing immediate failures.
* Set Obsolete State and Reason for Description Field (Version 2.0.0.0): The first step involves marking the Description field as obsolete by setting the ObsoleteState to ' Pending ' . This is a non-breaking change, signaling to other developers and users that the field is planned for removal in a future version.
An ObsoleteReason should also be provided to explain why the field is being deprecated.
* Set Obsolete State and Reason for Clone Procedure (Version 2.0.0.0): Similarly, the Clone procedure should be marked as obsolete with the ObsoleteState set to ' Pending ' . This indicates that the procedure is no longer in use and will be removed in the future. Providing an ObsoleteReason is best practice as it explains the rationale behind the decision.
* Remove the Description Field (Version 2.0.0.1): In the subsequent version, after the developers and users have been given time to adapt to the deprecation notice, the Description field can be safely removed from the Issue table. This is considered a breaking change, hence it is done after the field has been marked as obsolete in a previous version.
The reason for not removing the Description field and Clone procedure immediately in version 2.0.0.0 is to avoid causing runtime errors for any extensions or integrations that may depend on these components. By following this sequence, you provide a clear deprecation path that helps maintain the stability of the overall system while evolving the schema.
You create the following Vendor table and Item table in Business Central.
You require the following data set to assign vendors to items.
You need to create a query to assign the vendors.
Which three code blocks should you use to develop the solution? To answer, move the appropriate code blocks from the list of code blocks to the answer area and arrange them in the correct order.
NOTE: More than one order of answer choices is correct. You will receive credit for any of the correct orders you select.
Correct Answer:
Explanation:
dataitem(Item; Item)
SqlJoinType = InnerJoin;
DataItemLink = " Vendor No. " = Vendor.Vendor_No;
You need to access the RoomsAPI API from the canvas app.
What should you do?
- A. Include in the extension a codeunit of type Install that publishes RoomsAPI.
- B. Enable the APIs for the Business Central online environment.
- C. Open the Web Services page and publish the RoomsAPI page as a web service.
- D. Use the default API configuration in Business Central
Correct Answer: C 🗳️
You plan to run a debug for a client.
You extend the Standard Sales - Invoice report to add a new requirement.
You create a Report Extension ' Ext Standard Sales - Invoice ' with ID = 50100 and add the following lines of code. (Line numbers are included for reference only.)
The client informs you that the value of the New Total VATBaseLCY column is incorrect.
You need to run a debug to identify the cause.
Which four actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.
Correct Answer:
Explanation:
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