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Microsoft MB-820 Bundle

Exam Code: MB-820

Exam Name Microsoft Dynamics 365 Business Central Developer

Certification Provider: Microsoft

Corresponding Certification: Microsoft Certified: Dynamics 365 Business Central Developer Associate

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Microsoft Dynamics 365 Business Central Developer (MB-820) Practice Tests

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Microsoft MB-820 Practice Test 65

Question 640

At fictional Cedar Retail Group, the Business Central development team is supporting store procurement and finance and reviewing AL business logic and user experience during a code quality review (MB820-4.3-159). The observed development issue is that a workflow needs optional business arguments but developers add many duplicated procedure overloads with inconsistent behavior. Which recurring engineering check would best prevent this issue from returning?

  1. Use contract tests for all procedure variants.
  2. Test filter behavior with similarly named fields.
  3. Review externally visible procedures in every release.
  4. Review global variable dependencies in shared codeunits.

Explanation

Correct Answer

A:

The ongoing check is to use contract tests for all procedure variants. This helps detect recurrence when a workflow needs optional business arguments but developers add many duplicated procedure overloads with inconsistent behavior. The associated correction is to define clear procedures with appropriate parameter defaults or supported overload contracts; a confirming result is that every supported call path applies consistent business validation.

Incorrect Answers

B:

The proposed “Test filter behavior with similarly named fields” tests a different control: apply the intended record filter and validate current filter groups when composing queries. The reported condition is that a workflow needs optional business arguments but developers add many duplicated procedure overloads with inconsistent behavior; the more direct action is to use contract tests for all procedure variants.

C:

“Review externally visible procedures in every release” supports the separate task “use local/internal/protected access boundaries as appropriate to the AL object and intended consumers”, not the reported problem: a workflow needs optional business arguments but developers add many duplicated procedure overloads with inconsistent behavior. This case instead calls for “Use contract tests for all procedure variants”.

D:

“Review global variable dependencies in shared codeunits” concerns the separate step “refactor it into a procedure with explicit parameters and local state”. The reported issue is that a workflow needs optional business arguments but developers add many duplicated procedure overloads with inconsistent behavior, so the direct response is to use contract tests for all procedure variants.

Question 641

At fictional Harborline Health Supply, the Business Central development team is supporting medical supply purchasing and reviewing extension environment and deployment preparation during an extension upgrade rehearsal (MB820-2.1-028). The observed development issue is that an AL project cannot download symbols because launch.json points to the wrong environment. Which AL development or design response most directly addresses this issue?

  1. Install the current AL Language extension in Visual Studio Code and use its compiler and editor services.
  2. Correct the server, environment name, tenant and authentication settings for the intended Business Central sandbox.
  3. Keep application metadata separate from secret-bearing connection profiles and use supported secure sign-in.
  4. Separate app package identity/version metadata in app.json from run and attach configuration in launch.json.

Explanation

Correct Answer

B:

The most direct corrective response is to correct the server, environment name, tenant and authentication settings for the intended Business Central sandbox. This addresses the specific failure where an AL project cannot download symbols because launch.json points to the wrong environment. Acceptance evidence is that aL symbol download and debugging connect to the approved sandbox rather than production.

Incorrect Answers

A:

The proposed “Install the current AL Language extension in Visual Studio Code and use its compiler and editor services” tests a different control: install the current AL Language extension in Visual Studio Code and use its compiler and editor services. The reported condition is that an AL project cannot download symbols because launch.json points to the wrong environment; the more direct action is to correct the server, environment name, tenant and authentication settings for the intended Business Central sandbox.

C:

“Keep application metadata separate from secret-bearing connection profiles and use supported secure sign-in” concerns the separate step “keep application metadata separate from secret-bearing connection profiles and use supported secure sign-in”. The reported issue is that an AL project cannot download symbols because launch.json points to the wrong environment, so the direct response is to correct the server, environment name, tenant and authentication settings for the intended Business Central sandbox.

D:

“Separate app package identity/version metadata in app.json from run and attach configuration in launch.json” concerns the alternative task “separate app package identity/version metadata in app.json from run and attach configuration in launch.json”, but the stated failure is that an AL project cannot download symbols because launch.json points to the wrong environment. The required measure is to correct the server, environment name, tenant and authentication settings for the intended Business Central sandbox.

Question 642

At fictional Harborline Health Supply, the Business Central development team is supporting medical supply purchasing and reviewing extension environment and deployment preparation during an extension upgrade rehearsal (MB820-2.1-028). The observed development issue is that an AL project cannot download symbols because launch.json points to the wrong environment. Which Business Central or AL development principle best explains the right response?

  1. Compilation compatibility requires deliberate runtime targeting.
  2. Supported developer tooling shortens the feedback loop for AL errors.
  3. Compilation depends on both symbol availability and declared app relationships.
  4. Development connection configuration must identify the target environment accurately.

Explanation

Correct Answer

D:

The governing principle is that development connection configuration must identify the target environment accurately. The engineering response is to correct the server, environment name, tenant and authentication settings for the intended Business Central sandbox. Verification should show that aL symbol download and debugging connect to the approved sandbox rather than production.

Incorrect Answers

A:

“Compilation compatibility requires deliberate runtime targeting” supports the separate task “align the runtime and platform/application version fields with the supported target environment”, not the reported problem: an AL project cannot download symbols because launch.json points to the wrong environment. This case instead calls for “correct the server, environment name, tenant and authentication settings for the intended Business Central sandbox”.

B:

“Supported developer tooling shortens the feedback loop for AL errors” concerns the separate step “install the current AL Language extension in Visual Studio Code and use its compiler and editor services”. The reported issue is that an AL project cannot download symbols because launch.json points to the wrong environment, so the direct response is to correct the server, environment name, tenant and authentication settings for the intended Business Central sandbox.

C:

“Compilation depends on both symbol availability and declared app relationships” concerns the alternative task “download current symbols and declare the required app dependency with compatible versions”, but the stated failure is that an AL project cannot download symbols because launch.json points to the wrong environment. The required measure is to correct the server, environment name, tenant and authentication settings for the intended Business Central sandbox.

Question 643

At fictional Harborline Health Supply, the Business Central development team is supporting medical supply purchasing and reviewing extension environment and deployment preparation during an extension upgrade rehearsal (MB820-2.1-028). The observed development issue is that an AL project cannot download symbols because launch.json points to the wrong environment. Which observed result would most clearly show the intended correction works?

  1. Each developer connects only to the tenant and sandbox they are authorized to use.
  2. Experimental deployments do not modify live company data or affect productive users.
  3. AL symbol download and debugging connect to the approved sandbox rather than production.
  4. Package versioning and debug connection behave independently under correct files.

Explanation

Correct Answer

C:

This is the outcome that directly verifies the intended correction: aL symbol download and debugging connect to the approved sandbox rather than production. The related solution is to correct the server, environment name, tenant and authentication settings for the intended Business Central sandbox; it is based on the principle that development connection configuration must identify the target environment accurately.

Incorrect Answers

A:

“Each developer connects only to the tenant and sandbox they are authorized to use” concerns the separate step “use separate, minimally scoped development configurations rather than shared cross-customer endpoints”. The reported issue is that an AL project cannot download symbols because launch.json points to the wrong environment, so the direct response is to AL symbol download and debugging connect to the approved sandbox rather than production.

B:

“Experimental deployments do not modify live company data or affect productive users” concerns the alternative task “create and target a dedicated sandbox environment with nonproduction data and restricted permissions”, but the stated failure is that an AL project cannot download symbols because launch.json points to the wrong environment. The required measure is to AL symbol download and debugging connect to the approved sandbox rather than production.

D:

“Package versioning and debug connection behave independently under correct files” supports the separate task “separate app package identity/version metadata in app.json from run and attach configuration in launch.json”, not the reported problem: an AL project cannot download symbols because launch.json points to the wrong environment. This case instead calls for “AL symbol download and debugging connect to the approved sandbox rather than production”.

Question 644

At fictional Harborline Health Supply, the Business Central development team is supporting medical supply purchasing and reviewing extension environment and deployment preparation during an extension upgrade rehearsal (MB820-2.1-028). The observed development issue is that an AL project cannot download symbols because launch.json points to the wrong environment. Which recurring engineering check would best prevent this issue from returning?

  1. Run clean symbol restoration on a fresh CI agent.
  2. Review environment connection settings before shared-workspace adoption.
  3. Verify sandbox URLs and profiles before enabling debugging.
  4. Lint project configuration for misplaced connection properties.

Explanation

Correct Answer

C:

The ongoing check is to verify sandbox URLs and profiles before enabling debugging. This helps detect recurrence when an AL project cannot download symbols because launch.json points to the wrong environment. The associated correction is to correct the server, environment name, tenant and authentication settings for the intended Business Central sandbox; a confirming result is that aL symbol download and debugging connect to the approved sandbox rather than production.

Incorrect Answers

A:

“Run clean symbol restoration on a fresh CI agent” concerns the alternative task “download current symbols and declare the required app dependency with compatible versions”, but the stated failure is that an AL project cannot download symbols because launch.json points to the wrong environment. The required measure is to verify sandbox URLs and profiles before enabling debugging.

B:

The proposed “Review environment connection settings before shared-workspace adoption” tests a different control: use separate, minimally scoped development configurations rather than shared cross-customer endpoints. The reported condition is that an AL project cannot download symbols because launch.json points to the wrong environment; the more direct action is to verify sandbox URLs and profiles before enabling debugging.

D:

“Lint project configuration for misplaced connection properties” concerns the separate step “separate app package identity/version metadata in app.json from run and attach configuration in launch.json”. The reported issue is that an AL project cannot download symbols because launch.json points to the wrong environment, so the direct response is to verify sandbox URLs and profiles before enabling debugging.

Question 645

At fictional Orchard Agriculture, the Business Central development team is supporting farm supplier procurement and reviewing object model and application extensibility during a troubleshooting exercise (MB820-3.5-105). The observed development issue is that an employee should see inventory but should not modify unit costs. Which Business Central or AL development principle best explains the right response?

  1. Read, insert, modify and delete privileges must be scoped independently.
  2. Object execution and data permissions are separate requirements.
  3. Least privilege limits blast radius from extensibility flaws.
  4. UI visibility is not a security boundary.

Explanation

Correct Answer

A:

The governing principle is that read, insert, modify and delete privileges must be scoped independently. The engineering response is to assign a role with read rights and no unauthorized edit permissions to the relevant table data. Verification should show that read succeeds and an attempted unauthorized write is denied.

Incorrect Answers

B:

“Object execution and data permissions are separate requirements” supports the separate task “include appropriate page execution permissions and necessary underlying table-data rights”, not the reported problem: an employee should see inventory but should not modify unit costs. This case instead calls for “assign a role with read rights and no unauthorized edit permissions to the relevant table data”.

C:

“Least privilege limits blast radius from extensibility flaws” concerns the separate step “trim permissions to the exact object set and operations required for business tasks”. The reported issue is that an employee should see inventory but should not modify unit costs, so the direct response is to assign a role with read rights and no unauthorized edit permissions to the relevant table data.

D:

“UI visibility is not a security boundary” concerns the alternative task “enforce access using resource-side permission sets and protected code paths”, but the stated failure is that an employee should see inventory but should not modify unit costs. The required measure is to assign a role with read rights and no unauthorized edit permissions to the relevant table data.

Question 646

At fictional Orchard Agriculture, the Business Central development team is supporting farm supplier procurement and reviewing object model and application extensibility during a troubleshooting exercise (MB820-3.5-105). The observed development issue is that an employee should see inventory but should not modify unit costs. Which observed result would most clearly show the intended correction works?

  1. The user's final effective rights match the approved access matrix.
  2. Authorized users can perform required operations on the new table only.
  3. The intended role can open the page and read only its authorized records.
  4. Read succeeds and an attempted unauthorized write is denied.

Explanation

Correct Answer

D:

This is the outcome that directly verifies the intended correction: read succeeds and an attempted unauthorized write is denied. The related solution is to assign a role with read rights and no unauthorized edit permissions to the relevant table data; it is based on the principle that read, insert, modify and delete privileges must be scoped independently.

Incorrect Answers

A:

“The user's final effective rights match the approved access matrix” supports the separate task “inspect effective permissions and role composition, then remove or constrain excessive assignments”, not the reported problem: an employee should see inventory but should not modify unit costs. This case instead calls for “Read succeeds and an attempted unauthorized write is denied”.

B:

“Authorized users can perform required operations on the new table only” concerns the separate step “add the table-data rights to an appropriate permissionset or permissionsetextension”. The reported issue is that an employee should see inventory but should not modify unit costs, so the direct response is to read succeeds and an attempted unauthorized write is denied.

C:

“The intended role can open the page and read only its authorized records” concerns the alternative task “include appropriate page execution permissions and necessary underlying table-data rights”, but the stated failure is that an employee should see inventory but should not modify unit costs. The required measure is to read succeeds and an attempted unauthorized write is denied.

Question 647

At fictional Orchard Agriculture, the Business Central development team is supporting farm supplier procurement and reviewing object model and application extensibility during a troubleshooting exercise (MB820-3.5-105). The observed development issue is that an employee should see inventory but should not modify unit costs. Which AL development or design response most directly addresses this issue?

  1. Enforce access using resource-side permission sets and protected code paths.
  2. Assign a role with read rights and no unauthorized edit permissions to the relevant table data.
  3. Include appropriate page execution permissions and necessary underlying table-data rights.
  4. Model supported entitlements and application rights separately, testing their combined effect.

Explanation

Correct Answer

B:

The most direct corrective response is to assign a role with read rights and no unauthorized edit permissions to the relevant table data. This addresses the specific failure where an employee should see inventory but should not modify unit costs. Acceptance evidence is that read succeeds and an attempted unauthorized write is denied.

Incorrect Answers

A:

“Enforce access using resource-side permission sets and protected code paths” concerns the separate step “enforce access using resource-side permission sets and protected code paths”. The reported issue is that an employee should see inventory but should not modify unit costs, so the direct response is to assign a role with read rights and no unauthorized edit permissions to the relevant table data.

C:

The proposed “Include appropriate page execution permissions and necessary underlying table-data rights” tests a different control: include appropriate page execution permissions and necessary underlying table-data rights. The reported condition is that an employee should see inventory but should not modify unit costs; the more direct action is to assign a role with read rights and no unauthorized edit permissions to the relevant table data.

D:

“Model supported entitlements and application rights separately, testing their combined effect” supports the separate task “model supported entitlements and application rights separately, testing their combined effect”, not the reported problem: an employee should see inventory but should not modify unit costs. This case instead calls for “assign a role with read rights and no unauthorized edit permissions to the relevant table data”.

Question 648

At fictional Orchard Agriculture, the Business Central development team is supporting farm supplier procurement and reviewing object model and application extensibility during a troubleshooting exercise (MB820-3.5-105). The observed development issue is that an employee should see inventory but should not modify unit costs. Which recurring engineering check would best prevent this issue from returning?

  1. Run explicit negative authorization tests for sensitive operations.
  2. Compare effective role grants before each release.
  3. Check permission drift with every new object declaration.
  4. Run functional smoke tests with nonadmin users.

Explanation

Correct Answer

A:

The ongoing check is to run explicit negative authorization tests for sensitive operations. This helps detect recurrence when an employee should see inventory but should not modify unit costs. The associated correction is to assign a role with read rights and no unauthorized edit permissions to the relevant table data; a confirming result is that read succeeds and an attempted unauthorized write is denied.

Incorrect Answers

B:

The proposed “Compare effective role grants before each release” tests a different control: trim permissions to the exact object set and operations required for business tasks. The reported condition is that an employee should see inventory but should not modify unit costs; the more direct action is to run explicit negative authorization tests for sensitive operations.

C:

“Check permission drift with every new object declaration” supports the separate task “add the table-data rights to an appropriate permissionset or permissionsetextension”, not the reported problem: an employee should see inventory but should not modify unit costs. This case instead calls for “Run explicit negative authorization tests for sensitive operations”.

D:

“Run functional smoke tests with nonadmin users” concerns the separate step “identify required object/table permissions and provide the narrowest supported permission set”. The reported issue is that an employee should see inventory but should not modify unit costs, so the direct response is to run explicit negative authorization tests for sensitive operations.

Question 649

At fictional Evergreen Print, the Business Central development team is supporting print production scheduling and reviewing object model and application extensibility during a sandbox design review (MB820-3.4-103). The observed development issue is that a business process needs initial setup data on first install and updated configuration during an app version change. Which Business Central or AL development principle best explains the right response?

  1. App installation and data upgrade are different lifecycle events.
  2. Codeunits encapsulate reusable AL behavior.
  3. Transaction control must respect business process atomicity.
  4. Event subscribers must respect publisher data and signature semantics.

Explanation

Correct Answer

A:

The governing principle is that app installation and data upgrade are different lifecycle events. The engineering response is to use distinct Install and Upgrade codeunits, implementing the appropriate lifecycle triggers. Verification should show that fresh installations and upgrades apply only their intended initialization or migration actions. Applied here, the relevant facts are: The observed development issue is that a business process needs initial setup data on first install and updated configuration during an app version change. The question asks which Business Central or AL development principle best explains the right response.

Incorrect Answers

B:

“Codeunits encapsulate reusable AL behavior” supports the separate task “move reusable logic to an appropriate codeunit and call it through a stable interface”, not the reported problem: a business process needs initial setup data on first install and updated configuration during an app version change. This case instead calls for “use distinct Install and Upgrade codeunits, implementing the appropriate lifecycle triggers”.

C:

“Transaction control must respect business process atomicity” concerns the separate step “review transaction boundaries and remove unintended commits from reusable business logic”. The reported issue is that a business process needs initial setup data on first install and updated configuration during an app version change, so the direct response is to use distinct Install and Upgrade codeunits, implementing the appropriate lifecycle triggers.

D:

“Event subscribers must respect publisher data and signature semantics” concerns the alternative task “inspect the event signature and handle missing or incomplete values according to contract”, but the stated failure is that a business process needs initial setup data on first install and updated configuration during an app version change. The required measure is to use distinct Install and Upgrade codeunits, implementing the appropriate lifecycle triggers.

Question 650

At fictional Evergreen Print, the Business Central development team is supporting print production scheduling and reviewing object model and application extensibility during a sandbox design review (MB820-3.4-103). The observed development issue is that a business process needs initial setup data on first install and updated configuration during an app version change. Which recurring engineering check would best prevent this issue from returning?

  1. Test all business entry points for the rule.
  2. Test both zero-data and historical-data upgrade paths.
  3. Use unit tests to detect divergent calculation paths.
  4. Scan high-impact extension code for unexpected commits.

Explanation

Correct Answer

B:

The ongoing check is to test both zero-data and historical-data upgrade paths. This helps detect recurrence when a business process needs initial setup data on first install and updated configuration during an app version change. The associated correction is to use distinct Install and Upgrade codeunits, implementing the appropriate lifecycle triggers; a confirming result is that fresh installations and upgrades apply only their intended initialization or migration actions. Applied here, the relevant facts are: The observed development issue is that a business process needs initial setup data on first install and updated configuration during an app version change. The question asks which recurring engineering check would best prevent this issue from returning.

Incorrect Answers

A:

“Test all business entry points for the rule” supports the separate task “subscribe to an appropriate published business event or design a reusable codeunit validation at the relevant process boundary”, not the reported problem: a business process needs initial setup data on first install and updated configuration during an app version change. This case instead calls for “Test both zero-data and historical-data upgrade paths”.

C:

“Use unit tests to detect divergent calculation paths” concerns the alternative task “move reusable logic to an appropriate codeunit and call it through a stable interface”, but the stated failure is that a business process needs initial setup data on first install and updated configuration during an app version change. The required measure is to test both zero-data and historical-data upgrade paths.

D:

The proposed “Scan high-impact extension code for unexpected commits” tests a different control: review transaction boundaries and remove unintended commits from reusable business logic. The reported condition is that a business process needs initial setup data on first install and updated configuration during an app version change; the more direct action is to test both zero-data and historical-data upgrade paths.