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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 7

Question 60

At fictional Evergreen Print, the Business Central development team is supporting print production scheduling and reviewing object model and application extensibility during an extension maintenance sprint (MB820-3.1-054). The observed development issue is that an application stores stable product categories as free text and receives inconsistent category spellings. Which AL development or design response most directly addresses this issue?

  1. Model categories with a supported enum or related lookup table appropriate to extensibility requirements.
  2. Use a compatible field design and controlled initialization that respects existing rows.
  3. Use pageextension action modifications at a suitable existing placement.
  4. Create a tableextension to add the field and a pageextension to surface it on the customer page.

Explanation

Correct Answer

A:

The most direct corrective response is to model categories with a supported enum or related lookup table appropriate to extensibility requirements. This addresses the specific failure where an application stores stable product categories as free text and receives inconsistent category spellings. Acceptance evidence is that new records accept controlled category values without arbitrary unsupported strings.

Incorrect Answers

B:

The proposed “Use a compatible field design and controlled initialization that respects existing rows” tests a different control: use a compatible field design and controlled initialization that respects existing rows. The reported condition is that an application stores stable product categories as free text and receives inconsistent category spellings; the more direct action is to model categories with a supported enum or related lookup table appropriate to extensibility requirements.

C:

“Use pageextension action modifications at a suitable existing placement” supports the separate task “use pageextension action modifications at a suitable existing placement”, not the reported problem: an application stores stable product categories as free text and receives inconsistent category spellings. This case instead calls for “model categories with a supported enum or related lookup table appropriate to extensibility requirements”.

D:

“Create a tableextension to add the field and a pageextension to surface it on the customer page” concerns the separate step “create a tableextension to add the field and a pageextension to surface it on the customer page”. The reported issue is that an application stores stable product categories as free text and receives inconsistent category spellings, so the direct response is to model categories with a supported enum or related lookup table appropriate to extensibility requirements.

Question 61

At fictional Clearwater Tours, the Business Central development team is supporting booking invoice administration and reviewing external-service integration during a tenant acceptance test (MB820-6.2-195). The observed development issue is that a Business Central service action must post a document but developers only expose writable fields and expect setting a status to replicate posting. Which observed result would most clearly show the intended correction works?

  1. The partner can retrieve and update authorized records through the declared API contract.
  2. Existing integrations keep working until consumers opt into the new version.
  3. The caller gets the intended action outcome without bypassing document posting rules.
  4. The consumer sees a documented field in the supported API version.

Explanation

Correct Answer

C:

This is the outcome that directly verifies the intended correction: the caller gets the intended action outcome without bypassing document posting rules. The related solution is to implement or expose an appropriate supported bound/unbound action that invokes validated posting logic; it is based on the principle that business operations often require action endpoints, not raw field mutation.

Incorrect Answers

A:

The proposed “The partner can retrieve and update authorized records through the declared API contract” tests a different control: create an appropriately configured API page with stable entity name, entity set, publisher and version properties. The reported condition is that a Business Central service action must post a document but developers only expose writable fields and expect setting a status to replicate posting; the more direct action is to the caller gets the intended action outcome without bypassing document posting rules.

B:

“Existing integrations keep working until consumers opt into the new version” supports the separate task “preserve compatible contracts or introduce a deliberate versioned API and migration path”, not the reported problem: a Business Central service action must post a document but developers only expose writable fields and expect setting a status to replicate posting. This case instead calls for “The caller gets the intended action outcome without bypassing document posting rules”.

D:

“The consumer sees a documented field in the supported API version” concerns the alternative task “publish a compatible new API contract or supported API page design rather than assuming API page extension is available”, but the stated failure is that a Business Central service action must post a document but developers only expose writable fields and expect setting a status to replicate posting. The required measure is to the caller gets the intended action outcome without bypassing document posting rules.

Question 62

At fictional Clearwater Tours, the Business Central development team is supporting booking invoice administration and reviewing external-service integration during a tenant acceptance test (MB820-6.2-195). The observed development issue is that a Business Central service action must post a document but developers only expose writable fields and expect setting a status to replicate posting. Which recurring engineering check would best prevent this issue from returning?

  1. Test action permissions and posting effects.
  2. Test duplicate submission and late response scenarios.
  3. Run negative authorization tests against API endpoints.
  4. Test multi-line and missing-child API responses.

Explanation

Correct Answer

A:

The ongoing check is to test action permissions and posting effects. This helps detect recurrence when a Business Central service action must post a document but developers only expose writable fields and expect setting a status to replicate posting. The associated correction is to implement or expose an appropriate supported bound/unbound action that invokes validated posting logic; a confirming result is that the caller gets the intended action outcome without bypassing document posting rules.

Incorrect Answers

B:

“Test duplicate submission and late response scenarios” concerns the separate step “define idempotency and stable external reference handling in the API-backed business process”. The reported issue is that a Business Central service action must post a document but developers only expose writable fields and expect setting a status to replicate posting, so the direct response is to test action permissions and posting effects.

C:

“Run negative authorization tests against API endpoints” concerns the alternative task “expose only approved actions and enforce permissions and validation at the service boundary”, but the stated failure is that a Business Central service action must post a document but developers only expose writable fields and expect setting a status to replicate posting. The required measure is to test action permissions and posting effects.

D:

The proposed “Test multi-line and missing-child API responses” tests a different control: design appropriate API page parts or supported related entity navigation with stable keys. The reported condition is that a Business Central service action must post a document but developers only expose writable fields and expect setting a status to replicate posting; the more direct action is to test action permissions and posting effects.

Question 63

At fictional Clearwater Tours, the Business Central development team is supporting booking invoice administration and reviewing external-service integration during a tenant acceptance test (MB820-6.2-195). The observed development issue is that a Business Central service action must post a document but developers only expose writable fields and expect setting a status to replicate posting. Which Business Central or AL development principle best explains the right response?

  1. API contract design should enforce data minimization.
  2. Business operations often require action endpoints, not raw field mutation.
  3. API versioning protects downstream integration dependencies.
  4. API pages are service-oriented object contracts distinct from interactive UI pages.

Explanation

Correct Answer

B:

The governing principle is that business operations often require action endpoints, not raw field mutation. The engineering response is to implement or expose an appropriate supported bound/unbound action that invokes validated posting logic. Verification should show that the caller gets the intended action outcome without bypassing document posting rules.

Incorrect Answers

A:

“API contract design should enforce data minimization” concerns the separate step “expose only the minimal approved fields and apply entitlement and permission rules”. The reported issue is that a Business Central service action must post a document but developers only expose writable fields and expect setting a status to replicate posting, so the direct response is to implement or expose an appropriate supported bound/unbound action that invokes validated posting logic.

C:

The proposed “API versioning protects downstream integration dependencies” tests a different control: preserve compatible contracts or introduce a deliberate versioned API and migration path. The reported condition is that a Business Central service action must post a document but developers only expose writable fields and expect setting a status to replicate posting; the more direct action is to implement or expose an appropriate supported bound/unbound action that invokes validated posting logic.

D:

“API pages are service-oriented object contracts distinct from interactive UI pages” supports the separate task “create an appropriately configured API page with stable entity name, entity set, publisher and version properties”, not the reported problem: a Business Central service action must post a document but developers only expose writable fields and expect setting a status to replicate posting. This case instead calls for “implement or expose an appropriate supported bound/unbound action that invokes validated posting logic”.

Question 64

At fictional Clearwater Tours, the Business Central development team is supporting booking invoice administration and reviewing external-service integration during a tenant acceptance test (MB820-6.2-195). The observed development issue is that a Business Central service action must post a document but developers only expose writable fields and expect setting a status to replicate posting. Which AL development or design response most directly addresses this issue?

  1. Implement or expose an appropriate supported bound/unbound action that invokes validated posting logic.
  2. Expose only the minimal approved fields and apply entitlement and permission rules.
  3. Publish a compatible new API contract or supported API page design rather than assuming API page extension is available.
  4. Preserve compatible contracts or introduce a deliberate versioned API and migration path.

Explanation

Correct Answer

A:

The most direct corrective response is to implement or expose an appropriate supported bound/unbound action that invokes validated posting logic. This addresses the specific failure where a Business Central service action must post a document but developers only expose writable fields and expect setting a status to replicate posting. Acceptance evidence is that the caller gets the intended action outcome without bypassing document posting rules.

Incorrect Answers

B:

The proposed “Expose only the minimal approved fields and apply entitlement and permission rules” tests a different control: expose only the minimal approved fields and apply entitlement and permission rules. The reported condition is that a Business Central service action must post a document but developers only expose writable fields and expect setting a status to replicate posting; the more direct action is to implement or expose an appropriate supported bound/unbound action that invokes validated posting logic.

C:

“Publish a compatible new API contract or supported API page design rather than assuming API page extension is available” supports the separate task “publish a compatible new API contract or supported API page design rather than assuming API page extension is available”, not the reported problem: a Business Central service action must post a document but developers only expose writable fields and expect setting a status to replicate posting. This case instead calls for “implement or expose an appropriate supported bound/unbound action that invokes validated posting logic”.

D:

“Preserve compatible contracts or introduce a deliberate versioned API and migration path” concerns the separate step “preserve compatible contracts or introduce a deliberate versioned API and migration path”. The reported issue is that a Business Central service action must post a document but developers only expose writable fields and expect setting a status to replicate posting, so the direct response is to implement or expose an appropriate supported bound/unbound action that invokes validated posting logic.

Question 65

At fictional Alder Distribution, the Business Central development team is supporting wholesale order fulfillment and reviewing extension environment and deployment preparation during an AL developer handoff (MB820-2.1-027). The observed development issue is that a developer creates an AL workspace without a target runtime matching the planned production release. Which observed result would most clearly show the intended correction works?

  1. AL symbol download and debugging connect to the approved sandbox rather than production.
  2. The repository contains no credentials while the extension still builds and deploys.
  3. IntelliSense and the compiler resolve the referenced symbols from the intended libraries.
  4. The extension compiles and deploys against the actual target version.

Explanation

Correct Answer

D:

This is the outcome that directly verifies the intended correction: the extension compiles and deploys against the actual target version. The related solution is to align the runtime and platform/application version fields with the supported target environment; it is based on the principle that compilation compatibility requires deliberate runtime targeting.

Incorrect Answers

A:

The proposed “AL symbol download and debugging connect to the approved sandbox rather than production” tests a different control: correct the server, environment name, tenant and authentication settings for the intended Business Central sandbox. The reported condition is that a developer creates an AL workspace without a target runtime matching the planned production release; the more direct action is to the extension compiles and deploys against the actual target version.

B:

“The repository contains no credentials while the extension still builds and deploys” supports the separate task “keep application metadata separate from secret-bearing connection profiles and use supported secure sign-in”, not the reported problem: a developer creates an AL workspace without a target runtime matching the planned production release. This case instead calls for “The extension compiles and deploys against the actual target version”.

C:

“IntelliSense and the compiler resolve the referenced symbols from the intended libraries” concerns the separate step “download current symbols and declare the required app dependency with compatible versions”. The reported issue is that a developer creates an AL workspace without a target runtime matching the planned production release, so the direct response is to the extension compiles and deploys against the actual target version.

Question 66

At fictional Alder Distribution, the Business Central development team is supporting wholesale order fulfillment and reviewing extension environment and deployment preparation during an AL developer handoff (MB820-2.1-027). The observed development issue is that a developer creates an AL workspace without a target runtime matching the planned production release. Which AL development or design response most directly addresses this issue?

  1. Configure an appropriate multi-root workspace and preserve distinct app manifests and dependencies.
  2. Align the runtime and platform/application version fields with the supported target environment.
  3. Separate app package identity/version metadata in app.json from run and attach configuration in launch.json.
  4. Download current symbols and declare the required app dependency with compatible versions.

Explanation

Correct Answer

B:

The most direct corrective response is to align the runtime and platform/application version fields with the supported target environment. This addresses the specific failure where a developer creates an AL workspace without a target runtime matching the planned production release. Acceptance evidence is that the extension compiles and deploys against the actual target version.

Incorrect Answers

A:

“Configure an appropriate multi-root workspace and preserve distinct app manifests and dependencies” supports the separate task “configure an appropriate multi-root workspace and preserve distinct app manifests and dependencies”, not the reported problem: a developer creates an AL workspace without a target runtime matching the planned production release. This case instead calls for “align the runtime and platform/application version fields with the supported target environment”.

C:

“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 a developer creates an AL workspace without a target runtime matching the planned production release. The required measure is to align the runtime and platform/application version fields with the supported target environment.

D:

The proposed “Download current symbols and declare the required app dependency with compatible versions” tests a different control: download current symbols and declare the required app dependency with compatible versions. The reported condition is that a developer creates an AL workspace without a target runtime matching the planned production release; the more direct action is to align the runtime and platform/application version fields with the supported target environment.

Question 67

At fictional Alder Distribution, the Business Central development team is supporting wholesale order fulfillment and reviewing extension environment and deployment preparation during an AL developer handoff (MB820-2.1-027). The observed development issue is that a developer creates an AL workspace without a target runtime matching the planned production release. Which recurring engineering check would best prevent this issue from returning?

  1. Check supported VS Code and AL extension versions during onboarding.
  2. Review runtime changes before upgrading compiler tooling.
  3. Block production endpoints in development launch profiles.
  4. Lint project configuration for misplaced connection properties.

Explanation

Correct Answer

B:

The ongoing check is to review runtime changes before upgrading compiler tooling. This helps detect recurrence when a developer creates an AL workspace without a target runtime matching the planned production release. The associated correction is to align the runtime and platform/application version fields with the supported target environment; a confirming result is that the extension compiles and deploys against the actual target version.

Incorrect Answers

A:

“Check supported VS Code and AL extension versions during onboarding” 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 a developer creates an AL workspace without a target runtime matching the planned production release, so the direct response is to review runtime changes before upgrading compiler tooling.

C:

The proposed “Block production endpoints in development launch profiles” tests a different control: create and target a dedicated sandbox environment with nonproduction data and restricted permissions. The reported condition is that a developer creates an AL workspace without a target runtime matching the planned production release; the more direct action is to review runtime changes before upgrading compiler tooling.

D:

“Lint project configuration for misplaced connection properties” 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: a developer creates an AL workspace without a target runtime matching the planned production release. This case instead calls for “Review runtime changes before upgrading compiler tooling”.

Question 68

At fictional Alder Distribution, the Business Central development team is supporting wholesale order fulfillment and reviewing extension environment and deployment preparation during an AL developer handoff (MB820-2.1-027). The observed development issue is that a developer creates an AL workspace without a target runtime matching the planned production release. Which Business Central or AL development principle best explains the right response?

  1. Stale symbol caches can mask compatibility problems.
  2. Development isolation reduces operational and data risks.
  3. Supported developer tooling shortens the feedback loop for AL errors.
  4. Compilation compatibility requires deliberate runtime targeting.

Explanation

Correct Answer

D:

The governing principle is that compilation compatibility requires deliberate runtime targeting. The engineering response is to align the runtime and platform/application version fields with the supported target environment. Verification should show that the extension compiles and deploys against the actual target version.

Incorrect Answers

A:

“Stale symbol caches can mask compatibility problems” concerns the alternative task “refresh downloaded symbols and resolve dependency versions against the new application target”, but the stated failure is that a developer creates an AL workspace without a target runtime matching the planned production release. The required measure is to align the runtime and platform/application version fields with the supported target environment.

B:

The proposed “Development isolation reduces operational and data risks” tests a different control: create and target a dedicated sandbox environment with nonproduction data and restricted permissions. The reported condition is that a developer creates an AL workspace without a target runtime matching the planned production release; the more direct action is to align the runtime and platform/application version fields with the supported target environment.

C:

“Supported developer tooling shortens the feedback loop for AL errors” supports the separate task “install the current AL Language extension in Visual Studio Code and use its compiler and editor services”, not the reported problem: a developer creates an AL workspace without a target runtime matching the planned production release. This case instead calls for “align the runtime and platform/application version fields with the supported target environment”.

Question 69

At fictional Elmbridge Logistics, the Business Central development team is supporting warehouse shipment scheduling and reviewing automated testing and diagnostics during an AL developer handoff (MB820-5.2-178). The observed development issue is that a developer sends custom telemetry but no Application Insights configuration is connected to the intended environment. Which AL development or design response most directly addresses this issue?

  1. Configure telemetry and use meaningful dimensions to link the operation to the affected environment.
  2. Use stable event identifiers and a controlled schema for emitted telemetry.
  3. Configure a supported telemetry destination and confirm the extension's emitted events reach it.
  4. Instrument both success and failure paths with status, duration and safe error identifiers.

Explanation

Correct Answer

C:

The most direct corrective response is to configure a supported telemetry destination and confirm the extension's emitted events reach it. This addresses the specific failure where a developer sends custom telemetry but no Application Insights configuration is connected to the intended environment. Acceptance evidence is that an expected test signal appears in the authorized Application Insights resource.

Incorrect Answers

A:

The proposed “Configure telemetry and use meaningful dimensions to link the operation to the affected environment” tests a different control: configure telemetry and use meaningful dimensions to link the operation to the affected environment. The reported condition is that a developer sends custom telemetry but no Application Insights configuration is connected to the intended environment; the more direct action is to configure a supported telemetry destination and confirm the extension's emitted events reach it.

B:

“Use stable event identifiers and a controlled schema for emitted telemetry” supports the separate task “use stable event identifiers and a controlled schema for emitted telemetry”, not the reported problem: a developer sends custom telemetry but no Application Insights configuration is connected to the intended environment. This case instead calls for “configure a supported telemetry destination and confirm the extension's emitted events reach it”.

D:

“Instrument both success and failure paths with status, duration and safe error identifiers” concerns the alternative task “instrument both success and failure paths with status, duration and safe error identifiers”, but the stated failure is that a developer sends custom telemetry but no Application Insights configuration is connected to the intended environment. The required measure is to configure a supported telemetry destination and confirm the extension's emitted events reach it.

Question 70

At fictional Elmbridge Logistics, the Business Central development team is supporting warehouse shipment scheduling and reviewing automated testing and diagnostics during an AL developer handoff (MB820-5.2-178). The observed development issue is that a developer sends custom telemetry but no Application Insights configuration is connected to the intended environment. Which Business Central or AL development principle best explains the right response?

  1. Silent background failures require explicit diagnostics.
  2. Telemetry generation and telemetry collection are separate setup steps.
  3. Telemetry should balance useful signal and operational overhead.
  4. Correlation reduces ambiguity in distributed troubleshooting.

Explanation

Correct Answer

B:

The governing principle is that telemetry generation and telemetry collection are separate setup steps. The engineering response is to configure a supported telemetry destination and confirm the extension's emitted events reach it. Verification should show that an expected test signal appears in the authorized Application Insights resource.

Incorrect Answers

A:

“Silent background failures require explicit diagnostics” supports the separate task “emit safe failure signals and preserve actionable error outcomes in the job path”, not the reported problem: a developer sends custom telemetry but no Application Insights configuration is connected to the intended environment. This case instead calls for “configure a supported telemetry destination and confirm the extension's emitted events reach it”.

C:

“Telemetry should balance useful signal and operational overhead” concerns the alternative task “use appropriate verbosity and targeted instrumentation for meaningful events”, but the stated failure is that a developer sends custom telemetry but no Application Insights configuration is connected to the intended environment. The required measure is to configure a supported telemetry destination and confirm the extension's emitted events reach it.

D:

The proposed “Correlation reduces ambiguity in distributed troubleshooting” tests a different control: use supported telemetry correlation identifiers and span context where available. The reported condition is that a developer sends custom telemetry but no Application Insights configuration is connected to the intended environment; the more direct action is to configure a supported telemetry destination and confirm the extension's emitted events reach it.