View Full Microsoft MB-820 Exam Dumps and Practice Test Dumps.

 

Question 1

In Microsoft Dynamics 365 Business Central, what is the primary purpose of a company?

1. To define a specific business entity and its data within the Business Central environment
2. To control only user passwords
3. To store only extension source code
4. To replace the general ledger

Correct Answer: 1

Explanation

A company in Microsoft Dynamics 365 Business Central represents a business entity whose operational and financial data is managed within the application. Different companies can maintain separate sets of customers, vendors, items, general ledger entries, and other business records. This allows organizations to manage multiple legal entities or business operations within the same Business Central environment while keeping their data appropriately separated. Companies are therefore an important structural concept for configuration and data management. Developers and administrators must understand company context because many records and processes are company-specific. Security, configuration, and application behavior may also depend on the company in which a user is working.

Question 2

Which programming language is primarily used to develop extensions for Microsoft Dynamics 365 Business Central?

1. C#
2. AL
3. Python
4. Java

Correct Answer: 2

Explanation

AL is the programming language used to develop and customize Microsoft Dynamics 365 Business Central applications and extensions. It is specifically designed for working with Business Central objects such as tables, pages, reports, codeunits, queries, and extensions. Developers use AL to add functionality while following the platform’s extension-based development model. Compared with modifying the base application directly, extensions provide a more controlled and upgrade-friendly approach to customization. Visual Studio Code together with the AL Language extension is commonly used for AL development. Understanding AL syntax, object types, events, data structures, and application architecture is therefore fundamental for developers preparing for the MB-820 certification.

Question 3

Which Business Central object is primarily used to store structured business data?

1. Page
2. Report
3. Table
4. Codeunit

Correct Answer: 3

Explanation

Tables are the primary objects used to store structured data in Business Central. They define fields, keys, and other characteristics of the data being stored. Examples include customer, vendor, item, and general ledger-related tables. Pages are generally used to display and interact with data, while reports focus on presenting or processing information. Codeunits contain reusable business logic. Understanding the relationship between these objects is essential for AL development because applications commonly combine them to provide complete functionality. When developing an extension, a developer may create new tables or extend existing tables to support additional business requirements while maintaining compatibility with the Business Central application architecture.

Question 4

What is the main purpose of a page extension in Business Central?

1. To modify the SQL Server engine
2. To replace the AL compiler
3. To create a new company
4. To add or modify UI elements on an existing page

Correct Answer: 4

Explanation

A page extension allows developers to customize an existing Business Central page without modifying the original page object directly. Developers can add fields, actions, FactBoxes, or other supported user interface elements to meet specific business requirements. This extension-based approach helps preserve the maintainability and upgradeability of the application because customizations remain separated from the base application. Page extensions are particularly useful when an organization needs additional information or functionality on a standard Business Central page. The developer must understand the structure and extensibility points of the target page before implementing changes. Proper page extensions can provide tailored experiences while minimizing conflicts with future application updates.

Question 5

Which AL object is commonly used to encapsulate reusable business logic?

1. Codeunit
2. Table
3. Query
4. Page

Correct Answer: 1

Explanation

A codeunit is an AL object designed to contain reusable business logic and procedures. Developers can use codeunits to organize functionality that may be called from pages, reports, events, jobs, or other application components. Separating business logic into codeunits can improve maintainability and reduce duplication across an application. Codeunits can also contain event subscribers, allowing extensions to respond to events raised by other Business Central objects. Although pages can contain certain logic, placing reusable business operations in appropriate codeunits often produces a cleaner application structure. Developers should design codeunits with clear responsibilities so that functionality remains understandable, testable, and reusable throughout the Business Central solution.

Question 6

Which AL feature is commonly used to respond to events raised by Business Central objects?

1. Table key
2. Event subscriber
3. Page field
4. Permission set

Correct Answer: 2

Explanation

Event subscribers allow AL code to respond when specific events are raised by Business Central application objects. An extension can subscribe to a publisher event and execute custom logic when that event occurs, without directly modifying the original application code. This is an important part of Business Central’s extensibility model because it supports loosely coupled customization. Event subscribers can be used for validation, additional processing, integration scenarios, and other business requirements. Developers should select appropriate events and avoid unnecessary dependencies on implementation details. Proper event-driven design helps extensions remain more maintainable and reduces the risk of conflicts when Microsoft updates the standard Business Central application.

Question 7

What is the primary purpose of a key defined on a Business Central table?

1. To determine the user’s license
2. To define how records can be organized and efficiently accessed
3. To create a new page automatically
4. To control report formatting

Correct Answer: 2

Explanation

A table key defines fields that can be used to organize and access records efficiently. Keys are important for record retrieval, sorting, filtering, and enforcing certain uniqueness requirements depending on their configuration and usage. Developers should choose keys carefully based on how the application accesses data and the business requirements of the table. Poorly designed keys can affect application behavior and performance, especially when working with large datasets. Keys are separate from user interface elements such as pages and reports. Understanding primary keys, secondary keys, and appropriate indexing concepts helps Business Central developers create data structures that support reliable and efficient application behavior.

Question 8

Which object is most appropriate for presenting Business Central data in a printable or structured output format?

1. Table
2. Codeunit
3. Report
4. Permission set

Correct Answer: 3

Explanation

Reports are designed to process and present Business Central data in structured output formats. They can retrieve records, apply filters, organize information, and produce layouts suitable for viewing or printing. Business Central supports different reporting approaches, and developers can design report datasets and layouts according to business requirements. Tables provide the underlying data, while codeunits are generally used for business logic rather than presentation. Reports may be used for invoices, statements, operational summaries, and other business documents. Developers should understand report data items, columns, request pages, filters, and layouts when creating reporting functionality. Efficient report design is also important when processing large amounts of data.

Question 9

What does a table extension allow a developer to do?

1. Add supported fields or functionality to an existing table
2. Delete the entire Business Central database
3. Replace the AL language
4. Create a new user account automatically

Correct Answer: 1

Explanation

A table extension allows developers to extend an existing Business Central table without directly modifying the original table object. Depending on the supported extensibility model, developers can add fields, keys, and other table-related elements needed by an extension. This approach is useful when organizations need to store additional information associated with standard Business Central records. For example, an extension might add a custom field to a customer or item record. Using extensions rather than modifying the base application directly helps improve upgrade compatibility and maintainability. Developers should still consider data ownership, validation, performance, and dependencies when extending standard tables.

Question 10

Which development environment is commonly used with the AL Language extension for Business Central development?

1. Visual Studio
2. Visual Studio Code
3. Microsoft Word
4. PowerPoint

Correct Answer: 2

Explanation

Visual Studio Code is commonly used for developing Business Central extensions with the AL Language extension. The AL extension provides language support, syntax highlighting, IntelliSense, debugging capabilities, project management, and tools for interacting with Business Central development environments. Business Central developers create AL projects containing objects and application metadata, then publish and test their extensions against an appropriate environment. Using Visual Studio Code supports the modern extension-based development model and integrates development activities into a lightweight environment. Developers should also understand source control, project configuration, dependencies, and deployment workflows to manage AL projects effectively throughout the development lifecycle.

Question 11

What is the purpose of a permission set in Business Central?

1. To define the permissions a user has for application objects and data
2. To store customer addresses
3. To generate financial statements
4. To define table relationships

Correct Answer: 1

Explanation

Permission sets define the access rights that users or groups receive within Business Central. They can specify permissions for objects such as tables, pages, reports, and other application components. Proper permission management is important because users should have enough access to perform their responsibilities without receiving unnecessary privileges. Developers may define permission sets as part of an extension when their functionality requires specific access rights. Security design should consider roles, business responsibilities, sensitive information, and separation of duties. Permission sets are therefore an important part of Business Central security and should be tested carefully to ensure that required functionality works while unauthorized operations remain restricted.

Question 12

Which AL statement is commonly used to retrieve or work with a record from a table variable?

1. Begin
2. Record
3. Commit
4. Permission

Correct Answer:2

Explanation

In AL, the Record data type is used to represent records from Business Central tables. A developer can declare a record variable based on a specific table and then use methods such as Find, Get, SetRange, SetFilter, Modify, Insert, and Delete to work with the data, depending on the scenario and permissions. Understanding record handling is fundamental to Business Central development because many business processes require retrieving, filtering, validating, and updating records. Developers must also consider transaction behavior, locking, filtering, and error handling when manipulating records. Efficient record operations are especially important when working with large datasets or frequently executed business processes.

Question 13

What is the primary purpose of a query object in Business Central?

1. To define user passwords
2. To retrieve and combine data from tables for analysis or processing
3. To create permission sets
4. To replace all pages

Correct Answer: 2

Explanation

A query object is used to retrieve and combine data from one or more Business Central tables. Queries can define data items, columns, filters, and relationships that allow developers to obtain structured datasets for processing or analysis. They can be useful when information from multiple related tables needs to be retrieved efficiently. Queries are different from pages because their primary purpose is data retrieval rather than user interaction. Developers should design query relationships carefully and consider filtering and performance requirements. Understanding query objects is valuable for building integrations, analytical functionality, and other scenarios where application data needs to be retrieved in a structured and reusable manner.

Question 14

What is a major benefit of using extensions instead of modifying the Business Central base application directly?

1. Extensions improve upgradeability and separation of custom functionality
2. Extensions eliminate the need for testing
3. Extensions automatically fix all business logic errors
4. Extensions prevent all permission requirements

Correct Answer: 1

Explanation

Extensions provide a structured way to add or modify supported Business Central functionality while keeping custom code separate from the base application. This separation improves maintainability and generally makes it easier to adopt future application updates. Direct modifications to the base application can create conflicts and increase the effort required during upgrades. Extensions also encourage developers to use supported APIs, events, and extension points. However, extensions do not eliminate the need for testing, security configuration, or careful design. Developers should still validate compatibility, dependencies, performance, and business behavior. A well-designed extension follows platform conventions and minimizes unnecessary coupling to internal implementation details.

Question 15

Which AL construct is appropriate for handling errors and preventing invalid business operations from continuing?

1. Error handling and validation logic
2. Page captions only
3. Table names
4. Report layouts

Correct Answer: 1

Explanation

Error handling and validation logic help ensure that invalid business operations do not continue and that users receive meaningful information when something goes wrong. Business Central developers can use validation mechanisms, error statements, and appropriate AL patterns to enforce business rules and respond to exceptional conditions. Validation may occur when fields are changed, records are inserted or modified, or specific business processes are executed. Good error handling should provide useful information without exposing unnecessary technical details. Developers should also avoid suppressing important errors merely to allow a process to continue. Proper validation improves data integrity, user experience, and the reliability of Business Central extensions.

Question 16

Which Business Central feature helps developers package and distribute custom functionality as a deployable solution?

1. Extension package
2. Customer card
3. General journal
4. Item ledger entry

Correct Answer: 1

Explanation

An extension package contains the components required to deploy custom Business Central functionality. It can include AL objects and other application metadata associated with an extension. Packaging custom functionality in this way supports controlled deployment and version management. Extensions can be developed, tested, published, upgraded, and eventually removed using the Business Central extension model. Developers should manage dependencies and version information carefully because extensions may rely on other applications or specific platform capabilities. Proper packaging also supports deployment across environments and helps organizations maintain a consistent application landscape. Before deployment, extensions should undergo appropriate testing to verify functionality, security, performance, and compatibility.

Question 17

What is the purpose of the OnValidate trigger on a Business Central table field?

1. To automatically delete the record
2. To execute logic when the field value is validated or changed
3. To create a new company
4. To publish the extension

Correct Answer: 2

Explanation

The OnValidate trigger is used to execute validation-related logic when a field value is validated. It is commonly used to enforce business rules, calculate dependent values, check conditions, or perform other processing associated with a field change. Developers should understand the difference between field validation and other record lifecycle triggers because selecting the appropriate trigger helps ensure predictable application behavior. Validation logic should be designed carefully so that it does not introduce unnecessary side effects or unexpected dependencies. When extending Business Central, developers should also consider existing validation logic and supported extension points to avoid bypassing important business rules implemented by the standard application.

Question 18

Which practice is most appropriate when storing sensitive information in a Business Central extension?

1. Expose it on every page
2. Use appropriate permissions and minimize unnecessary access
3. Store it in public comments
4. Give all users administrator privileges

Correct Answer: 2

Explanation

Sensitive information should be protected through appropriate access controls, data minimization, and secure application design. A Business Central extension should expose sensitive data only to users and processes that have a legitimate business need to access it. Permission sets and other security mechanisms can help restrict access to tables, fields, pages, and related functionality. Developers should also avoid unnecessary duplication of sensitive information and consider applicable organizational and regulatory requirements. Giving all users administrator privileges or exposing sensitive fields broadly increases security risk. Security requirements should be considered during design and development rather than being added only after the extension has already been implemented.

Question 19

What is the main purpose of AL namespaces?

1. To organize and distinguish code elements and reduce naming conflicts
2. To create customer invoices automatically
3. To replace database tables
4. To manage user passwords

Correct Answer: 1

Explanation

Namespaces provide a way to organize AL code and distinguish types or objects that may otherwise have similar names. They help structure larger applications and can reduce naming conflicts between different components or applications. This becomes particularly useful when solutions contain multiple libraries, dependencies, or custom functionality. Developers should use namespaces consistently according to the architecture and conventions of their Business Central project. Namespaces do not replace tables, manage passwords, or directly perform business transactions. Instead, they contribute to clearer application organization and improve the ability to manage code as a solution becomes larger and more complex.

Question 20

Which approach is generally recommended when developing a Business Central extension?

1. Modify standard application code whenever possible
2. Avoid source control for AL projects
3. Use supported extension points and follow Business Central development patterns
4. Deploy directly to production without testing

Correct Answer: 3

Explanation

Business Central extension development should follow supported extension points, application patterns, and platform capabilities. This includes using table and page extensions, events, APIs, appropriate AL objects, and documented development practices rather than directly modifying the base application. Developers should also use source control, automated or structured testing, code review, and controlled deployment processes. Following supported patterns improves maintainability and reduces compatibility problems when Business Central receives updates. Development should progress through appropriate environments before production deployment. A disciplined extension approach helps organizations create solutions that are easier to maintain, troubleshoot, upgrade, and govern while still meeting specific business requirements.