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Microsoft Dynamics 365 Business Central Developer Questions and Answers

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Question 1

You need to develop the report Subcontract Documents Excel List that is required by the control department.

You have the following 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 2

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 3

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 4

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 5

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 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 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 8

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 9

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

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 create the codeunit to read the POS terminal APIs.

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 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 13

You need to define the properties of the comments field of the Non-conformity 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 14

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 15

You need to provide the endpoint to the PMS provider for the RoomsAPI page.

How should you complete the API page endpoint? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point

Options:

Question 16

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 17

You need to define the data types for the fields of the N on-conformity table.

Which two data types should you use? Each correct answer presents part of the solution.

NOTE: Each correct selection is worth one point.

Options:

Integer for the N on-conformity Number field

Date Time for the Non-Conformity Date field

Char for the Non-Conformity Number field

Date for the Non-Conformity Date field

Code for the Non-Conformity Number field

Question 18

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 19

You need to use a query data type to retrieve requited data.

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

NOTE: Each correct selection is worth one point.

Options:

Question 20

A company uses Business Central Users in DepartmentA are assigned a base application permission set.

The company observes that Departments can display a critical page that should be unavailable to the department.

You need to resolve the system control issue.

What should you do?

Options:

Create a different role center page that excludes the critical page and assigns it to the users.

Extend the base application permission set and configure the Included PermissionSets property.

Extend the base application permission set and configure the ExcludedPermissionSets property

Create an entitlement object that excludes the base application permission set.

Create a permission set object that excludes the critical table and assigns it to the users.

Question 21

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 22

You need to allow debugging in an extension to view the source code. In which file should you specify the value of the allowDebugging property?

Options:

settings.json

rad.json

app.json

launchjson

Question 23

A company has an on-premises Business Central instance named TEST The instance uses Windows authorization and a developer services port of 7149 Visual Studio Code is installed on the same server.

You create a new AL project but cannot download the symbols.

The launch json file contains the following code:

You need to download the symbols.

Which two actions should you perform? Each correct answer presents part of the solution.

NOTE: Each correct selection is worth one point.

Options:

Change the server Instance parameter to TEST

Add the port: 7149 parameter.

Change the name parameter to TEST.

Change the authentication parameter to UserPassword.

Check which server the instance is installed on and replace http//localhost with the correct IP address.

Question 24

You have a per tenant extension that contains the following 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 25

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 set 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 on the review screen.

A company creates a Business Central app and a table named MyTable to store records when sales orders are posted.

Users report the following issues:

• The users receive permission errors related to MyTable.

• Users are no longer able to post sales orders since installing the new app.

• The users cannot access the list page created in MyTable.

You need to resolve the user issues without creating new permission sets. You must use the principle of least privilege.

Solution: Decorate the event subscriber used for inserting data in MyTable by entering (lnherentPermissions(PermissionOb]ectType:TableData. Database:MyTable. 'R')]

Does the solution meet the goal?

Options:

Yes

Question 26

A company plans to meet new regulatory requirements.

The regulator has issued new tax tiers.

You need to update the base application table by using a table extension.

Which table field property can you change?

Options:

CalcFormula

DecimalPlaces

BlankZero

AutoFormatType

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 on the review screen.

A company creates a Business Central app and a table named MyTable to store records when sales orders are posted.

Users report the following issues:

• The users receive permission errors related lo MyTable.

• Users are no longer able to post sales orders since installing the new app.

• The users cannot access the list page created in MyTable.

You need to resolve the user issues without creating new permission sets. You must use the principle of least privilege.

Solution: In the MyTable object add the property InherentPermissions = Rl.

Does the solution meet the goal?

Options:

Yes

Question 28

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 29

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 30

You need to implement the Issue Management module and expose the Postlssue method.

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.

NOTE: Note than one order of answer choices is correct. You will receive credit for any of the correct orders you select.

Options:

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 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 33

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.

Options:

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.

Question 34

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 35

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 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.

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Microsoft MB-820 Microsoft Dynamics 365 Business Central Developer Exam Practice Test

Microsoft Dynamics 365 Business Central Developer Questions and Answers

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