Latest Microsoft MB-820 Dumps PDF Questions Answers 2025

Microsoft Dynamics 365 Business Central Developer Questions and Answers

Question 1

You need to add a property to the Description and Comments fields with corresponding values for the control department manager.

Which property should you add?

Options:

Description

Caption

ToolTip

InstructionalText

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Question 2

You need to create the code related to the Subcontract Documents table to meet the requirement for the quality department.

How should you complete the code segment? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point.

Options:

Question 3

You need to edit the code to meet the formatting requirements on the Subcontract Document List for the control department.

Which formatting should you use?

Options:

Question 4

You need to assist the development department with setting up Visual Studio Code to design the purchase department extension, meeting the quality department requirements.

How should you complete the app.json file? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point.

Options:

Question 5

You need to define the XML file properties for the accounting department.

How should you complete the code segment? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point.

Options:

Question 6

You need to configure the Subcontract Docs extension to translate the fields.

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.

Options:

Question 7

You need to modify the API Customer list code to obtain the required 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.

Options:

Question 8

You need to evaluate the version values of the Quality Control extension to decide how the quality department must update it.

Which two values can you obtain in the evaluation? Each correct answer presents part of the solution. Choose two.

NOTE: Each correct selection is worth one point.

Options:

AppVersion - 1.0.0.1

AppVersion = 1.0.0.2

DataVersion = 0.0.0.0

DataVersion = 1.0.0.1

DataVersion = 1.0.0.2

Question 9

You need to create the Fabrikam Vendor API for the accounting department.

How should you complete the code segment? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point.

Options:

Question 10

The serial numbers of the non-conformities and the period in which they can be created must be in a configuration table and its corresponding page to allow them to be modified for the users.

You need to create the configuration table and page for the non-conformity functionality.

Which table configurations should you use? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point.

Options:

Question 11

You need to download a stored picture from the Room Incident page.

How should you complete the code segment? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point.

Options:

Question 12

You need to access the RoomsAPI API from the canvas app.

What should you do?

Options:

Use the default API configuration in Business Central

Enable the APIs for the Business Central online environment.

Open the Web Services page and publish the RoomsAPI page as a web service.

Include in the extension a codeunit of type Install that publishes RoomsAPI.

Question 13

You need to create the Install codeunit that is requited in the extension used for installing or updating the Housekeeping app.

Which data type or declaration should you use? To answer, select the appropriate options in the answer area.

NOTE; Each correct selection is worth one point.

Options:

Question 14

You need to define the properties for the Receipt No. field in the Non-conformity table when storing the information to the purchasing department

How should you complete the code segment? To answer, select the appropriate options in the answer area.

NOTE; Each correct selection is worth one point.

Options:

Question 15

You need to populate the Incident Date and Status fields in the Room Incident table.

Which instructions or trigger should you use? To answer, select the appropriate options in the answer area

NOTE: Each correct selection is worth one point

Options:

Question 16

You need to define the tables used for the non-conformity entity.

What should you use?

Options:

document history table to introduce the non-conformity entities

document table to introduce the non-conformity entities

supplemental table to introduce the non-conformity lines

Question 17

You need to create the configuration table and page for the non-conformity functionality.

Which table configurations should you use? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point

Options:

Question 18

You need to select the appropriate page types to solve the reporting requirements.

Which page types should you use? To answer, select the appropriate options in the answer area.

NOTE; Each correct selection is worth one point.

Options:

Question 19

You have a custom app.

A warning for the rule code named AA0XYZ appears in multiple app objects.

You need to change the severity of the rule from Warning to Info for only the current app.

Which three actions should you perform? Each correct answer presents part of the solution. (Choose three.)

NOTE: Each correct selection is worth one point.

Options:

Change the “al.enableCodeAnalysis” property value to “false”.

Open the Visual Studio Code user settings.json file.

Add the “al.ruleSetPath” property with a path to the ruleset.json file.

Open the Visual Studio Code project settings,json file.

Add the following ruleset object to the ruleset,json file:

{

“id”: “AA0XYZ”,

“action”: “Info” }

To the “rules” array.

Add the following ruleset object to the ruleset,json file:

{

“id”: “AA0XYZ”,

“action”: “Hidden” }

To the “rules” array.

Question 20

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.

Options:

Question 21

You plan to create a table to hold client data.

You have the following data integrity requirements:

• Lookups into other records must be established.

• Validate if a record exists in a destination record.

You need to select the table field property to use for each requirement.

Which table field property should you use? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point.

Options:

Question 22

You develop an extension for the newest release of Business Central online.

You have a customer who has an earlier on-premises release of Business Central. The extension must be deployed to the customer's environment.

You need to deploy the extension to the older Business Central version,

What should you do?

Options:

Replace the latest version of the AL Language extension with the needed earlier version.

Uninstall the AL Language extension and install the AL Language extension from the Business Central on-premises installation pack.

Change the Runtime property value of the app.json file of the app.

Question 23

A company has extended Business Central.

You plan to submit the extension to AppSource.

You need to ensure that an application meets the technical requirements before submitting it for validation.

Which three actions should you perform? Each correct answer presents a complete solution.

NOTE: Each correct selection is worth one point.

Options:

Use the OnBeforeCompanyOpen event for improved sign in time

Include extension translation files with the submission.

Ensure the app file is digitally signed

Code all date fields in the mm-dd-yyyy format

Use data classification on all tables and extension fields.

Question 24

You have a decimal variable named AmountlCY.

You need to round up the variable to four decimal places.

Which result value should you use?

Options:

Result: = Round (AmountLCY,A. '>"}:

Result: = Round {AmountLCY. 0.0001. =');

Result: = Round (AmountLCY. 0.0001. '<'):

Result: = Round (AmountLCY, 0.0001, >');

Question 25

You are customizing Business Central by using Visual Studio Code. You create a project that will extend Business Central. The AL extension contains JSON files, which are automatically generated and are used to store configuration data

For testing purposes, you plan to add the following changes to the files:

• Specify that page 21 must be opened after publishing.

• Enable debugging

• Disable the capability to download the source code

You need to add the configurations to the JSON files.

Which two configurations should you add? Each correct answer presents a complete solution.

NOTE: Each correct selection is worth one point.

Options:

Set "startupObjectld": 27 on launchjson.

In the "resourceExposurePolicy" tag, set "at low Debugging". true and allowDownloadingSource": false on launchjson.

Set "start upObjectld": 27 on appjson.

In the "resourceExposurePolicy" tag, set "allowDebugging": true and "allowDown loading Source": true on appjson.

In the "resourceExposurePolicy" tag, set "allowDebugging": true and "allowDownloadingSource": false on appjson.

Question 26

You create a query that contains a procedure to display the top customers.

The procedure breaks at runtime.

You need to fix the code.

For each of the following statements, select Yes if the statement is true. Otherwise, select No.

NOTE: Each correct selection is worth one point.

Options:

Question 27

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?

Options:

Yes

Question 28

You need to determine why the debugger does not start correctly.

What is the cause of the problem?

Options:

The "userld" parameter must have the GUID of the user specified, not the username.

The "breakOnNext" parameter is not set to -WebServiceClient".

The "userld" parameter is specified, and the next user session that is specified in the 'breakOnNext" parameter is snapshot debugged.

The "executionContext* parameter is not set to "Debug".

Question 29

You need to log an error in telemetry when the business process defined in the custom application developed for Contoso, Ltd fails.

How should you complete the code segment? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point.

Options:

Question 30

You need to determine If you have unwanted incoming web service calls in your tenant during the last seven days.

Which two KQL queries should you use? Each correct answer presents a complete solution.

NOTE: Each correct selection is worth one point.

Options:

Option A

Option B

Option C

Option D

Option E

Question 31

You need to write an Upgrade codeunit and use the DataTransfer object to handle the data upgrade.

Which solution should you use for each requirement? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point.

Options:

Question 32

You need to parse the API JSON response and retrieve each order no. in the response body.

How should you complete the code segment? To answer select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point.

Options:

Answer:

Explanation:

Code Segment Analysis:

The AL code is trying to read JSON data from a response and process it to extract subcontracting order numbers. It uses JsonToken, JsonObject, and JsonArray to work with the JSON data.

JToken.ReadFrom(Data): This line reads the incoming JSON data and converts it into a token. It processes the full JSON body so you can start working with it.

JToken.SelectToken("results"): This line selects the part of the JSON containing the results array. The key "results" is where the JSON response data is expected to be found.

JsonArray: Once the results are extracted, they are stored as an array, and each element in the array (which is expected to contain subcontracting order numbers) is processed.

SubcontractingOrderNo: The extracted order_no from the JSON is stored in this variable.

Breakdown of Steps:

JToken.ReadFrom(Data): This step reads the entire JSON response.

JToken.SelectToken("results"): This step selects the results array from the JSON response.

JArray.AsArray(): This step converts the selected results token into a JSON array that can be iterated over.

GetValueAsText(JToken, 'order_no'): This step retrieves the order_no from each element in the array.

Correct Code Completion:

JToken.ReadFrom(Data): This is the correct method to read the incoming JSON response, as it will convert the string into a JsonToken that can be further processed.

JToken.SelectToken("results"): This is the correct method to extract the results array from the token. This method looks for the key "results" in the JSON and retrieves the relevant array.

Final Code Segment:

Copy code

procedure ReadJsonData(Data: text)

var

JToken: JsonToken;

JObject: JsonObject;

JArray: JsonArray;

SubcontractingOrderNo: Code[20];

begin

if Data = '' then

exit;

JToken := JToken.ReadFrom(Data); // Step 1: Read the JSON response data.

JToken := JToken.SelectToken('results'); // Step 2: Select the "results" array.

JArray := JToken.AsArray(); // Convert the token into a JSON array.

foreach JToken in JArray do begin

SubcontractingOrderNo := GetValueAsText(JToken, 'order_no'); // Retrieve the order number.

end;

JToken.ReadFrom(Data): This reads the raw JSON data string and converts it into a JSON token that can be processed.

JToken.SelectToken("results"): This extracts the results array from the JSON data.

JArray.AsArray(): Converts the token into an array so we can iterate over it.

GetValueAsText(JToken, 'order_no'): Extracts the order_no value from each item in the array.

Question 33

You need to create the API page according to the requirements.

How should you complete the code segment? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point.

Options:

Question 34

You need to configure telemetry for the SaaS tenant and test whether the ingested signals are displayed.

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.

Options:

Question 35

You need to create the access modifier for IssueTotal.

Which variable declaration should you use?

Options:

Protected vat IssueTotal: Decimal

Internal var IssueTotal: Decimal

Public var IssueTotal: Decimal

Local var IssueTotal: Decimal

Var IssueTotal; Decimal

Answer:

Explanation:

In Business Central development using AL (the language for Business Central extensions), the use of access modifiers defines how variables and procedures are accessed within and outside of an object or codeunit.

Access Modifiers in AL:

Public: A public variable can be accessed from any object or codeunit within the same module or extension.

Protected: This restricts access to the current object and objects that inherit from the current object. However, in AL (at least in versions used for Business Central), the Protected access modifier is used with methods but not variables.

Internal: This modifier restricts the visibility to the current extension. This means that variables or methods declared as internal can only be accessed from within the same extension. This is appropriate when you want to provide functionality that is shared within the extension but not exposed externally.

Local: This restricts the variable or method to the current object or method where it is declared. It cannot be accessed from anywhere else, even within the same extension.

Scenario Justification:

In the scenario for Contoso, Ltd., IssueTotal is a global variable in the ISSUE BASE extension, and the ISSUE EXT extension needs to access it. Therefore, the variable cannot be declared as Local, because this would restrict access to just the current object (or method).

Using Public would expose the variable outside of the extension, which is unnecessary because you only want other parts of the extension (specifically the ISSUE EXT extension) to have access.

The best choice in this case is Internal because it restricts access to the variable to within the same extension, which includes the base extension and any dependent extensions like ISSUE EXT. It strikes the right balance between visibility and encapsulation.

Microsoft Dynamics 365 Business Central Developer References:

Access Modifiers in AL: Microsoft's documentation on AL provides the details on access modifiers, where it is specified that internal variables can be accessed within the extension, and the public variable is accessible across all extensions【source: Microsoft Learn on AL Programming】.

Best Practices for AL Development: Business Central development best practices suggest keeping variables internal unless they need to be accessed outside of the current extension【source: Microsoft Learn on AL development guidelines】.

Question 36

You need to determine why the extension does not appear in the tenant.

What are two possible reasons for the disappearance? Each correct answer presents a complete solution.

NOTE: Each correct selection is worth one point.

Options:

The extension was published as a DEV extension.

The extension was not compatible with the new version within 60 days of the first notification.

The extension was published as PTE. and the Platform parameter was not updated in the application file.

The extension was published as PTE. and the Platform and Runtime parameters were not updated in the application file.

The extension was not compatible with the new version within 90 days of the first notification.

Exam Detail

Vendor: Microsoft

Certification: Microsoft Certified: Dynamics 365 Business Central Developer Associate

Exam Code: MB-820

Exam Name: Microsoft Dynamics 365 Business Central Developer

Last Update: Feb 23, 2026

MB-820 Question Answers

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Microsoft Dynamics 365 Business Central Developer Questions and Answers

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