MB-820 Microsoft Dynamics 365 Business Central Developer exact Exam Questions

Microsoft Dynamics 365 Business Central Developer

Last Update 15 hours ago Total Questions : 122

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You'll find that our MB-820 exam questions frequently feature detailed scenarios and practical problem-solving exercises that directly mirror industry challenges. Engaging with these MB-820 sample sets allows you to effectively manage your time and pace yourself, giving you the ability to finish any Microsoft Dynamics 365 Business Central Developer practice test comfortably within the allotted time.

Question # 4

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.

Question # 5

You need to create the access modifier for IssueTotal.

Which variable declaration should you use?

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 # 6

You need to call the Issue API action from the mobile application.

Which action should you use?

POST/issues (88122e0e-5796-ec11-bb87-000d3a392eb5yMicrosoit.NAV.copy

PATCH /issues {88122 eOe-5796-ed 1 -bb87-000d3a392eb5)/Mkrosotl.NAV.Copy

POST /issues (88122e0e-5796-ec11 -bb87-000d3a392eb5)/Copy

POST /issues (88122e0e-5796-ec11 -bb87-000d3a392eb5)/copy

POST/issues(88122e0e-5796-ec11-bb87-000d3a392eb5)/MicrosoftNAV.Copy

Question # 7

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.

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.

Question # 8

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.

Question # 9

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.

Option A

Option B

Option C

Option D

Option E

Question # 10

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.

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.