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Microsoft MB-820 Sample Question Answers
Question # 1
A company has a Business Central online environment. You need to create an HTTP GET request that connects to an external REST service.Which solution should you use?
A. HttpContent data type variable B. Codeunit 1299 "Web Request Helper" C. Codeunit S459 "JSON Management" D. Codeunit 1297 "Http Web Request Mgt E. HttpClient data type variable
Answer: E
Explanation:
To create an HTTP GET request that connects to an external REST service in a Business Central online
environment, the solution to use is the HttpClient data type variable (E). The HttpClient data type in
AL language is designed for sending HTTP requests and receiving HTTP responses from a resource
identified by a URI. This makes it the ideal choice for interfacing with external REST services, as it
provides the necessary methods and properties to configure and execute HTTP GET requests, handle
the responses, and process the data returned by the REST service. This approach is more direct and
flexible compared to using specific codeunits like "Web Request Helper" (B) or "Http Web Request
Mgt" (D), which might not provide the same level of control or specificity needed for RESTful
interactions.
Question # 2
You need to access the RoomsAPI API from the canvas app.
What should you do?
A. Use the default API configuration in Business Central B. Enable the APIs for the Business Central online environment. C. Open the Web Services page and publish the RoomsAPI page as a web service. D. Include in the extension a codeunit of type Install that publishes RoomsAPI.
Answer: C Explanation: API Publishing for Extensions: In Business Central, when creating custom APIs like RoomsAPI, it is important to ensure that they are automatically published during the installation or upgrade of the extension. To achieve this, you can include a codeunit of type Install in the extension that explicitly publishes the custom API (RoomsAPI) as a web service. This ensures that it is available for use immediately after the extension is deployed without requiring manual intervention. Codeunit Type: A codeunit of type Install runs when the extension is installed or upgraded. This type of codeunit can be used to perform setup tasks such as publishing web services or APIs like RoomsAPI. Why Not Other Options? Option A (default API configuration): This would not automatically publish the RoomsAPI. Default APIs do not cover custom APIs. Option B (enable APIs for the environment): Enabling APIs in Business Central allows the standard APIs to be used, but custom APIs still need to be manually published. Option C (publish via Web Services page): This would work but requires manual intervention to publish RoomsAPI, which does not fulfill the requirement of automatic publishing during installation. Reference Documentation: Publishing APIs in Extensions Codeunit Types in Business Central
Question # 3
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?
A. Get-BcArtifactUrl -type sandbox -select Current B. Get-BcArtifactUrl -type sandbox -select Closest C. Get-BcArtifactUrl -type sandbox -select NextMinor D. Get-BcArtifactUrl -type sandbox -select NextMajor
Answer: A
Explanation:
To ensure the most recent Business Central artifact URL is selected for setting up a local Business
Central Development Docker container, the command to use is Get-BcArtifactUrl -type sandbox -
select Current (A). This PowerShell command retrieves the URL for the latest available Business
Central artifact for a sandbox environment, ensuring that the Docker container is set up with the
most up-to-date version for testing new project ideas. The -select Current parameter is crucial as it
specifies that the current, or latest, version of the artifact is to be retrieved, as opposed to selecting a
version based on other criteria such as Closest, NextMinor, or NextMajor.
Question # 4
A company uses Business Central. The company plans to use a translation file in an extension. The extension has a caption that should not be translated. You need to prevent the caption from being translated. What should you do?
A. Use the CaptionML property and copy the same caption for each language used. B. Set the GenerateLockedTranslations feature in the appjson file. C. Add the Locked = true parameter to the Caption. D. Delete the Caption property. E. Copy the same caption for each language in the translation file.
Answer: C
Explanation:
To prevent a caption from being translated in an extension for Microsoft Dynamics 365 Business
Central, you should add the Locked = true parameter to the Caption (C). This parameter explicitly
marks the caption as locked for translation, ensuring that it remains unchanged across different
language versions of the extension. This approach is useful for specific terms, brand names, or other
elements within the application that should remain consistent regardless of the user's language
settings. Unlike the other options, which involve manual manipulation of the translation file or
properties, setting Locked = true directly in the AL code provides a clear, maintainable, and errorproof
method to exclude specific captions from the translation process.
Question # 5
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?
A. settings.json B. rad.json C. app.json D. launchjson
Answer: C
Explanation:
To enable debugging in an extension and allow the source code to be viewed, the allowDebugging
property should be specified in the app.json file (C). The app.json file serves as the manifest for an AL
project in Microsoft Dynamics 365 Business Central, defining the project's properties, dependencies,
and features. By setting the allowDebugging property to true in this file, developers enable the
debugging of the extension's source code, facilitating troubleshooting and development. This is
essential for analyzing the behavior of the extension and identifying issues during the development
process.
Question # 6
You are cleaning up sandbox environments for a company. The company requires data to be cleared from the environments each time an extension is published. You need to configure the launch.json file. Which schemaUpdateMode property should you set?
A. ForceUpgrade B. ForceSync C. Synchronize D. Recreate
Answer: D
Explanation:
In the context of cleaning up sandbox environments for a company where data needs to be cleared
each time an extension is published, the schemaUpdateMode property in the launch.json file should
be set to Recreate (D). Setting this property to Recreate ensures that every time the extension is
published, the existing tables and data are dropped, and then the tables are recreated based on the
current extension's schema. This mode is particularly useful in development and testing
environments where you need a clean slate for testing each version of the extension without the
remnants of previous data affecting the outcomes. It's important to use this setting cautiously, as it
results in the loss of all existing data in the tables defined by the extension, which is suitable for a
sandbox environment but not for production environments.
Question # 7
You need to define the tables used for the non-conformity entity.
What should you use?
A. document history table to introduce the non-conformity entities B. document table to introduce the non-conformity entities C. supplemental table to introduce the non-conformity lines
Answer: B Explanation: Table Structure in Business Central: When creating entities such as "non-conformity" entities in Business Central, you use document tables to represent entities that have a header and line structure. In this case, the non-conformity entity has: A header with common information (Non-conformity Number, Date, Vendor No., etc.). One or more lines representing the detailed information for each non-conforming item. Document Table Usage: Document Table: A document table is the correct table type for scenarios where you have a header (with general information like vendor details) and lines (with detailed, item-specific information). Document tables are typically used for entities such as Sales Orders, Purchase Orders, or any other transactional data where you have both header and line information. Supplemental Table (Option C): Supplemental tables are usually used to add supplementary information to existing data in Business Central. In this case, we need to store detailed line information, which is a core part of the entity rather than supplementary data, so a supplemental table would not be appropriate here. Document History Table (Option A): Document history tables are used to track changes and historical data for entities but are not suitable for the main introduction of the entity and its lines. This option is also not appropriate. Reference Documentation: Introduction to Business Central Tables Document Tables in Business Central
Question # 8
You have a decimal variable named AmountlCY. You need to round up the variable to four decimal places. Which result value should you use?
A. Result: = Round (AmountLCY,
A. '>"}: B. Result: = Round {AmountLCY. 0.0001. ='); C. Result: = Round (AmountLCY. 0.0001. '<'): D. Result: = Round (AmountLCY, 0.0001, >');
Answer: B Explanation:
To round up a decimal variable to four decimal places in Microsoft Dynamics 365 Business Central,
you should use the Round function with specific parameters. The correct formula is Result :=
Round(AmountLCY, 0.0001, '=') (B). This function rounds the AmountLCY variable to the nearest value
based on the second parameter, which is 0.0001 in this case, representing four decimal places. The
third parameter, '=', specifies that the function should round to the nearest value, which effectively
rounds up the value when it's halfway between two possible rounded values. This approach ensures
that the AmountLCY variable is accurately rounded to four decimal places, which is essential for
financial calculations and reporting to maintain precision.
Question # 9
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. A. Integer for the N on-conformity Number field B. Date Time for the Non-Conformity Date field C. Char for the Non-Conformity Number field D. Date for the Non-Conformity Date field E. Code for the Non-Conformity Number field
Answer: C, E Explanation: In Business Central, fields in tables are assigned specific data types that determine the kind of data they can store. For the Non-conformity table mentioned in the case study, the following data types should be used: Date for the Non-Conformity Date field: This is because the Non-conformity Date field is required to store only the date when the non-conformity was recorded. The Date data type is appropriate for storing dates without times. Code for the Non-Conformity Number field: The Non-conformity Number field is described to use alphanumeric values with a format that includes "NC" and the year, like "NC24-001". In Business Central, the Code data type is used for fields that store alphanumeric keys. It is a text field with a limited length, which makes it suitable for number series that contain letters and numbers. Other options are not suitable: A. Integer for the Non-conformity Number field: This would not be appropriate because the Nonconformity Number includes alphanumeric characters and not just integers. B. DateTime for the Non-Conformity Date field: This is not correct because there is no requirement to store the time alongside the date. C. Char for the Non-Conformity Number field: Char data type is not typically used in Business Central for number series or identifiers. The Code data type is preferred for this purpose.
Question # 10
A company has a task that is performed infrequently. Users often need to look up the procedure to complete the task. The company requires a wizard that leads users through a sequence of steps to complete the task. You need to create the page to enable the wizard creation. Which page type should you use?
A. NavigatePage B. Card C. RoleCenter D. List
Answer: A
Explanation:
For a task that is performed infrequently and requires users to follow a sequence of steps, a wizardlike
interface is ideal. In Microsoft Dynamics 365 Business Central, the NavigatePage page type (A) is
best suited for this purpose. NavigatePage is designed to guide users through a series of steps or
pages, allowing them to complete a task by making choices or entering data in a structured manner.
This page type is often used for setup wizards, data migration tasks, or any other process that
benefits from a step-by-step approach. Unlike the other page types like Card (B), RoleCenter (C), or
List (D), NavigatePage specifically supports the navigation and decision-making flow required for
wizard creation, making it the optimal choice for this requirement.
Question # 11
A company has a Business Central online environment. You are exporting a file from a client by using the DownloadFromStream method. You need to create an InStream data type to send the data Which solution should you use?
A. Use OeatelnStream method from codeunit "Temp Blob". B. Use OeatelnStream method for BLOB field of "TempBlob" table. C. Use CreatelnStream method for File type variable.
Answer: A
Explanation:
When exporting a file from a client using the DownloadFromStream method in a Business Central
online environment, you need to create an InStream data type to send the data. The solution is to
use the CreateInStream method from codeunit "Temp Blob" (A). The Temp Blob codeunit provides
temporary storage of BLOBs (Binary Large Objects) and is commonly used for handling files and
streams in Business Central. By using the CreateInStream method on a Temp Blob, you create an
InStream that can then be used with the DownloadFromStream method to send the file data to the
client. This approach is efficient for file handling and transfer in Business Central, especially in
scenarios involving data export or file manipulation.
Question # 12
You create a page with the PageType property set to RoleCenter. You navigate through the different sections of the page. You need to add functionalities to the page. What should you do?
A. Define actions in the area (reporting) before actions in the area (creation). B. Define the navigation menu in the area(processing). C. Define the navigation bar in the area (embedding). D. Add a source table on the Role Center page.
Answer: C
Explanation:
When creating a page with the PageType property set to RoleCenter in Microsoft Dynamics 365
Business Central, it's essential to organize the functionalities and actions in a manner that enhances
user experience and efficiency. The best practice is to define actions in the area (reporting) before
actions in the area (creation) (A). This organization allows users to access reporting and analytical
features quickly, which are commonly used in Role Centers for overview and insight purposes, before moving on to creation or transactional tasks. This logical flow aligns with typical user workflows,
where analysis and review precede the creation of new records or transactions. The other options,
such as defining the navigation menu in the area(processing) (B), defining the navigation bar in the
area (embedding) (C), or adding a source table on the Role Center page (D), do not directly address
the need to add functionalities to the Role Center page in a user-friendly manner.
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