Pass your actual test at first attempt with Microsoft MB-820 training material
Updated: Oct 11, 2026
No. of Questions: 130 Questions & Answers with Testing Engine
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| Certification Vendor: | Microsoft |
|---|---|
| Exam Name: | Microsoft Dynamics 365 Business Central Developer |
| Exam Number: | MB-820 |
| Passing Score: | 700 (on a scale of 1–1000) |
| Exam Format: | Multiple choice, Drag and drop, Build list, Active screen, Case studies |
| Exam Price: | $165 USD |
| Real Exam Qty: | 40–60 |
| Exam Duration: | 90 minutes |
| Available Languages: | English |
| Certificate Validity Period: | 1 year |
| Recommended Training: | Microsoft Learn: Dynamics 365 Business Central Developer Learning Paths |
| Exam Registration: | Pearson VUE Microsoft Learn Exam Registration |
| Sample Questions: | Microsoft MB-820 Sample Questions |
| 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 |
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Reference: https://learn.microsoft.com/en-gb/credentials/certifications/resources/study-guides/mb-820
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result these questions will not appear in the review screen.
A company plans to optimize its permission sets.
The company has the following permission sets:
You need to provide the following implementation for a third permission set:
* Create a new Permission Set C that is a composite of Permission Set A and Permission Set B.
* Assign Permission Set C to a user.
You need to ensure that the user has only read access to the Job table.
Solution: Set the IncludedPermissionSets property to Permission Set A and the Excluded PermissionSets property to Permission SetB.
Does the solution meet the goal?
Correct Answer: B 🗳️
You create a procedure to check if a purchase order has lines.
The procedure returns false for purchase order PO-00001 even though it has purchase lines.
You need to fix the code to get the correct result.
For each of the following statements, select Yes if the statement is true Otherwise, select No.
NOTE- Each correct selection is worth one point.
Correct Answer:

Explanation:
No
No
Yes
No
Explanation:
1. The Bug: The issue lies in Line 06 : PurchaseLine.SetRange( " No. " , PurchaseHeader. " No. " );.
* In the Purchase Line table, the field " No. " represents the Item Number (or G/L Account number, etc.).
* The field that links the line to the Purchase Header is " Document No. " .
* Because the code filters the Item Number using the Document Number (e.g., searching for an Item named " PO-00001 " ), it finds no records. IsEmpty() returns true, and the function returns false.
2. Analysis of Options:
* Add Clear(PurchaseLine)... (No): The variable PurchaseLine is a local variable declared within the procedure. In AL, local record variables are automatically initialized when the procedure starts.
Clearing it manually is redundant and does not fix the logic error.
* Add PurchaseLine.SetFilter( " Line No. " , ' > 0 ' )... (No): While this is a valid filter to ensure you don ' t pick up empty lines, it does not solve the problem. The code is already failing because of the incorrect filter on line 06. Adding another filter won ' t find records that have already been excluded by the wrong " No. " filter.
* Change the filter on line 06 from " No. " to " Document No. " (Yes): This is the correct fix. To link a Purchase Line to a Purchase Header, you must join PurchaseHeader. " No. " to PurchaseLine. " Document No. " .
* Remove " not " in line 07 (No): The logic exit(not PurchaseLine.IsEmpty()); is correct.
* If lines exist, IsEmpty() is false. not false is true. (Correct result)
* If you remove " not " , the function would return true when the order is empty, which is the opposite of what is needed.
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:
You have an app with the Application Insights 1 connection string specified in app.json.
You create the following custom telemetry event in the app.
You publish the app to a customer environment that has a specified Application Insights 2 connection string.
The customer does not want the event to be displayed in Application Insights 2.
You need to ensure the event is displayed only in Application Insights 1.
What should you fix to achieve the goal?
Correct Answer: A 🗳️
A company plans to set up a local Business Central Development Docker container. The environment will be used for testing new project ideas.
You need to ensure that the most recent Business Central artifact URL has been selected. Which command should you use?
Correct Answer: A 🗳️
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