MB-820 exam dumps

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  • Exam Code: MB-820
  • Exam Name: Microsoft Dynamics 365 Business Central Developer
  • No. of Questions: 130 Questions and Answers
  • Updated: Oct 29, 2026

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Microsoft MB-820 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Develop by using AL objects: Building and extending tables and reports is discussed in this topic. It also explains Designing and creating an XMLport. Lastly, it discusses how to work with entitlement and permission set objects.
Topic 2
  • Describe Business Central: Describing the components and capabilities of Business Central, and describing the core solution and extensions approach for Business Central are focal points of this topic. It also explains the difference between Business Central Online and Business Central on-premises features.
Topic 3
  • Develop by using AL: How to Customize the UI experience and Use AL for business central extension is discussed here. It also delves into explaining the essential development standards.
Topic 4
  • Install, develop, and deploy for Business Central: It delves into the installation and configuration of a Business Central development environment. Moreover, it discusses creating, debugging, and deploying an extension in Business Central.

Reference: https://learn.microsoft.com/en-gb/credentials/certifications/resources/study-guides/mb-820

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Microsoft Dynamics 365 Business Central Developer Sample Questions:

A company owns and operates hotels, restaurants, and stores.
When the staff orders materials from the purchasing department, the requests are not directed to the correct approvers.
The staff requires a new field named Approver from which they can select the appropriate approver. The field must include the following options:
* Hotel manager
* Restaurant manager
* Store manager
* Purchasing manager
You need to create the Approver field in the Item table by using an AL extension.
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.

Reveal Solution  Discussion  0

Correct Answer:


Explanation:
Create an enum object named Approver and include all options.
* Reasoning: First, you must define the set of options (Hotel manager, Restaurant manager, etc.). In modern AL development, Enums are the standard way to create option sets because they are extensible.
Create a table extension object for an Item table with an Approver field of enum type named Approver in the field section.
* Reasoning: Next, you need to add the actual data field to the database. Since the " Item " table is a standard base table, you use a table extension. Tables use a fields section to define data columns. You reference the Enum created in step 1 here.
Create a page extension object that extends the Item Card object. Add the field to the layout section.
* Reasoning: Finally, to allow users to see and edit this new field on the screen, you must extend the " Item Card " page. Pages use a layout section to determine where controls appear.

You are developing an app that will be published to Microsoft AppSource.
The app requires code analyzers to enforce some rules. You plan to add the analyzers to the settings.json file.
You need to activate the analyzers for the project.
Which three code analyzers should you activate to develop the app for AppSource? Each correct answer presents part of the solution NOTE: Each correct selection is worth one point.

  • A. a custom rule set
  • B. AppSourceCop
  • C. UlCop
  • D. CodeCop
  • E. PerTenantExtensionCop
Reveal Solution  Discussion  0

Correct Answer: B,C,D  🗳️

You create a Business Central report.
You need to insert values on the Request page to be saved for the next time the report is run.
What should you do?

  • A. Set the Transact! on Type property to Update.
  • B. Set the SaveValues property to true.
  • C. Set the Use Request Page property to true.
  • D. Declare a Savevalues ' variable and assign it to true on the OnOpenPage () trigger.
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

You have a column in a report.
You receive the following warning from CodeCop:
"Field 'Home Page' is marked for removal. Reason: Field length will be increased to 255.. AL(AL0432) " You have the following code:
1 column(CompanyHomePage; CompanyInformation. " Home Page " )
2 {
3 }
For each of the following statements, select Yes if the statement is true, Otherwise, select No.
NOTE: Each correct selection is worth one point.

Reveal Solution  Discussion  0

Correct Answer:


Explanation:
1. Create a custom Home Page field for the Company information table.
* Selection: No
* Reasoning: Creating a custom field (e.g., 50000 " My Home Page " ) creates a disconnected data silo.
The standard application uses the standard " Home Page " field. If you create a custom one, it will be empty unless you write additional code to sync it, and it won ' t be populated by standard pages. The correct approach is to either use the replacement standard field (if one exists) or suppress the warning until you can refactor.
2. Enclose Line 1 within #pragma warning disable AL0432 .. #pragma warning restore AL0432.
* Selection: Yes
* Reasoning: This is the standard, correct " Code update " to manage specific deprecation warnings (AL0432). It allows you to continue using the field temporarily (e.g., during a transition period while the field is Obsolete: Pending) without breaking the build, and it limits the suppression strictly to the lines of code that require it, rather than blinding the entire project to deprecations.
3. Disable the AL0432 rule in the ruleset.
* Selection: No
* Reasoning: While this technically stops the warning from appearing, it is considered bad practice.
Disabling the rule in ruleset.json suppresses AL0432 for the entire project , meaning you might miss other critical deprecation warnings that you actually need to address. It is a configuration change, not a focused " code update " to manage a specific warning.
4. Remove or comment the column and then put it back after the field length is increased.
* Selection: No
* Reasoning: Removing or commenting out the column breaks the report functionality immediately (the data will disappear from the report). Furthermore, relying on " putting it back later " is not a valid strategy for continuous development; you need the code to work now . If the field is marked for removal, it may not exist " later " in its current form, so simply uncommenting it in the future might fail entirely.

You plan to call a web service by using the data type HttpClient from a Business Central AL extension You must provide the following implementation for the web service call:
* The web service must authenticate the client with a certificate.
* The certificate must include a password.
* The password must be hidden when you debug the code
You need to include the certificate in the web service call. Which instruction should you use?

  • A. HttpClient.AddCertificate{Certifkate: SecretText, Password: SecretText);
  • B. Httpclient.Addeertifieate(Certifieate: Blob, Password: secretText);
  • C. HttpClient.AddCertificate{Password: SecreTiext);
  • D. Httpclient.Addertifieate(certificate: Text, Password: Text);
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

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