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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 29

Question 280

At fictional Ironwood Charities, the Business Central development team is supporting grant funding and accounting and reviewing AL business logic and user experience during a localization review (MB820-4.2-142). The observed development issue is that a supplier import creates duplicate vendor master records because it uses display names as unique keys. Which AL development or design response most directly addresses this issue?

  1. Use stable vendor identifiers and defined match/merge rules for master data.
  2. Use supported posting codeunits and integration events to preserve core business invariants.
  3. Store stable customer attributes in an appropriate master-data table or extension field.
  4. Use supported numbering and posting design patterns for document identifiers.

Explanation

Correct Answer

A:

The most direct corrective response is to use stable vendor identifiers and defined match/merge rules for master data. This addresses the specific failure where a supplier import creates duplicate vendor master records because it uses display names as unique keys. Acceptance evidence is that repeated imports identify existing vendors rather than multiplying records.

Incorrect Answers

B:

The proposed “Use supported posting codeunits and integration events to preserve core business invariants” tests a different control: use supported posting codeunits and integration events to preserve core business invariants. The reported condition is that a supplier import creates duplicate vendor master records because it uses display names as unique keys; the more direct action is to use stable vendor identifiers and defined match/merge rules for master data.

C:

“Store stable customer attributes in an appropriate master-data table or extension field” supports the separate task “store stable customer attributes in an appropriate master-data table or extension field”, not the reported problem: a supplier import creates duplicate vendor master records because it uses display names as unique keys. This case instead calls for “use stable vendor identifiers and defined match/merge rules for master data”.

D:

“Use supported numbering and posting design patterns for document identifiers” concerns the separate step “use supported numbering and posting design patterns for document identifiers”. The reported issue is that a supplier import creates duplicate vendor master records because it uses display names as unique keys, so the direct response is to use stable vendor identifiers and defined match/merge rules for master data.

Question 281

At fictional Riverside Consulting, the Business Central development team is supporting professional project billing and reviewing object model and application extensibility during an extension maintenance sprint (MB820-3.5-110). The observed development issue is that a custom permission set grants table read access but users still cannot execute the page needed for daily tasks. Which recurring engineering check would best prevent this issue from returning?

  1. Test least-privilege roles using actual user scenarios.
  2. Check permission drift with every new object declaration.
  3. Audit privileged codeunit entry points.
  4. Test API and background code paths against role permissions.

Explanation

Correct Answer

A:

The ongoing check is to test least-privilege roles using actual user scenarios. This helps detect recurrence when a custom permission set grants table read access but users still cannot execute the page needed for daily tasks. The associated correction is to include appropriate page execution permissions and necessary underlying table-data rights; a confirming result is that the intended role can open the page and read only its authorized records. Applied here, the relevant facts are: The observed development issue is that a custom permission set grants table read access but users still cannot execute the page needed for daily tasks. The question asks which recurring engineering check would best prevent this issue from returning.

Incorrect Answers

B:

“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: a custom permission set grants table read access but users still cannot execute the page needed for daily tasks. This case instead calls for “Test least-privilege roles using actual user scenarios”.

C:

“Audit privileged codeunit entry points” concerns the separate step “use documented permissions properties or least-privilege execution design where applicable”. The reported issue is that a custom permission set grants table read access but users still cannot execute the page needed for daily tasks, so the direct response is to test least-privilege roles using actual user scenarios.

D:

“Test API and background code paths against role permissions” concerns the alternative task “enforce access using resource-side permission sets and protected code paths”, but the stated failure is that a custom permission set grants table read access but users still cannot execute the page needed for daily tasks. The required measure is to test least-privilege roles using actual user scenarios.

Question 282

At fictional Riverside Consulting, the Business Central development team is supporting professional project billing and reviewing object model and application extensibility during an extension maintenance sprint (MB820-3.5-110). The observed development issue is that a custom permission set grants table read access but users still cannot execute the page needed for daily tasks. Which AL development or design response most directly addresses this issue?

  1. Add the table-data rights to an appropriate permissionset or permissionsetextension.
  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. Inspect effective permissions and role composition, then remove or constrain excessive assignments.

Explanation

Correct Answer

C:

The most direct corrective response is to include appropriate page execution permissions and necessary underlying table-data rights. This addresses the specific failure where a custom permission set grants table read access but users still cannot execute the page needed for daily tasks. Acceptance evidence is that the intended role can open the page and read only its authorized records. Applied here, the relevant facts are: The observed development issue is that a custom permission set grants table read access but users still cannot execute the page needed for daily tasks. The question asks which AL development or design response most directly addresses this issue.

Incorrect Answers

A:

“Add the table-data rights to an appropriate permissionset or permissionsetextension” supports the separate task “add the table-data rights to an appropriate permissionset or permissionsetextension”, not the reported problem: a custom permission set grants table read access but users still cannot execute the page needed for daily tasks. This case instead calls for “include appropriate page execution permissions and necessary underlying table-data rights”.

B:

“Assign a role with read rights and no unauthorized edit permissions to the relevant table data” concerns the separate step “assign a role with read rights and no unauthorized edit permissions to the relevant table data”. The reported issue is that a custom permission set grants table read access but users still cannot execute the page needed for daily tasks, so the direct response is to include appropriate page execution permissions and necessary underlying table-data rights.

D:

The proposed “Inspect effective permissions and role composition, then remove or constrain excessive assignments” tests a different control: inspect effective permissions and role composition, then remove or constrain excessive assignments. The reported condition is that a custom permission set grants table read access but users still cannot execute the page needed for daily tasks; the more direct action is to include appropriate page execution permissions and necessary underlying table-data rights.

Question 283

At fictional Riverside Consulting, the Business Central development team is supporting professional project billing and reviewing object model and application extensibility during an extension maintenance sprint (MB820-3.5-110). The observed development issue is that a custom permission set grants table read access but users still cannot execute the page needed for daily tasks. Which observed result would most clearly show the intended correction works?

  1. The feature works while unrelated customer tables remain inaccessible.
  2. The intended role can open the page and read only its authorized records.
  3. Users with the intended license retain approved features while restricted capabilities remain unavailable.
  4. Authorized users can perform required operations on the new table only.

Explanation

Correct Answer

B:

This is the outcome that directly verifies the intended correction: the intended role can open the page and read only its authorized records. The related solution is to include appropriate page execution permissions and necessary underlying table-data rights; it is based on the principle that object execution and data permissions are separate requirements. Applied here, the relevant facts are: The observed development issue is that a custom permission set grants table read access but users still cannot execute the page needed for daily tasks. The question asks which observed result would most clearly show the intended correction works.

Incorrect Answers

A:

“The feature works while unrelated customer tables remain inaccessible” concerns the separate step “trim permissions to the exact object set and operations required for business tasks”. The reported issue is that a custom permission set grants table read access but users still cannot execute the page needed for daily tasks, so the direct response is to the intended role can open the page and read only its authorized records.

C:

The proposed “Users with the intended license retain approved features while restricted capabilities remain unavailable” tests a different control: model supported entitlements and application rights separately, testing their combined effect. The reported condition is that a custom permission set grants table read access but users still cannot execute the page needed for daily tasks; the more direct action is to the intended role can open the page and read only its authorized records.

D:

“Authorized users can perform required operations on the new table only” supports the separate task “add the table-data rights to an appropriate permissionset or permissionsetextension”, not the reported problem: a custom permission set grants table read access but users still cannot execute the page needed for daily tasks. This case instead calls for “The intended role can open the page and read only its authorized records”.

Question 284

At fictional Riverside Consulting, the Business Central development team is supporting professional project billing and reviewing object model and application extensibility during an extension maintenance sprint (MB820-3.5-110). The observed development issue is that a custom permission set grants table read access but users still cannot execute the page needed for daily tasks. Which Business Central or AL development principle best explains the right response?

  1. Composite permissions may be broader than an individual set suggests.
  2. Object execution and data permissions are separate requirements.
  3. Elevated execution must be deliberately scoped and reviewed.
  4. UI visibility is not a security boundary.

Explanation

Correct Answer

B:

The governing principle is that object execution and data permissions are separate requirements. The engineering response is to include appropriate page execution permissions and necessary underlying table-data rights. Verification should show that the intended role can open the page and read only its authorized records. Applied here, the relevant facts are: The observed development issue is that a custom permission set grants table read access but users still cannot execute the page needed for daily tasks. The question asks which Business Central or AL development principle best explains the right response.

Incorrect Answers

A:

“Composite permissions may be broader than an individual set suggests” concerns the alternative task “inspect effective permissions and role composition, then remove or constrain excessive assignments”, but the stated failure is that a custom permission set grants table read access but users still cannot execute the page needed for daily tasks. The required measure is to include appropriate page execution permissions and necessary underlying table-data rights.

C:

“Elevated execution must be deliberately scoped and reviewed” supports the separate task “use documented permissions properties or least-privilege execution design where applicable”, not the reported problem: a custom permission set grants table read access but users still cannot execute the page needed for daily tasks. This case instead calls for “include appropriate page execution permissions and necessary underlying table-data rights”.

D:

“UI visibility is not a security boundary” concerns the separate step “enforce access using resource-side permission sets and protected code paths”. The reported issue is that a custom permission set grants table read access but users still cannot execute the page needed for daily tasks, so the direct response is to include appropriate page execution permissions and necessary underlying table-data rights.

Question 285

At fictional Quayside Events, the Business Central development team is supporting event vendor payments and reviewing external-service integration during a sandbox design review (MB820-6.2-198). The observed development issue is that an API consumer sends duplicate create requests after a timeout, generating two shipment records. 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. Define idempotency and stable external reference handling in the API-backed business process.
  3. Evaluate supported read scale-out patterns for appropriate read workloads without compromising consistency needs.
  4. Expose only approved actions and enforce permissions and validation at the service boundary.

Explanation

Correct Answer

B:

The most direct corrective response is to define idempotency and stable external reference handling in the API-backed business process. This addresses the specific failure where an API consumer sends duplicate create requests after a timeout, generating two shipment records. Acceptance evidence is that a repeated request does not create duplicate shipments.

Incorrect Answers

A:

The proposed “Implement or expose an appropriate supported bound/unbound action that invokes validated posting logic” tests a different control: implement or expose an appropriate supported bound/unbound action that invokes validated posting logic. The reported condition is that an API consumer sends duplicate create requests after a timeout, generating two shipment records; the more direct action is to define idempotency and stable external reference handling in the API-backed business process.

C:

“Evaluate supported read scale-out patterns for appropriate read workloads without compromising consistency needs” concerns the separate step “evaluate supported read scale-out patterns for appropriate read workloads without compromising consistency needs”. The reported issue is that an API consumer sends duplicate create requests after a timeout, generating two shipment records, so the direct response is to define idempotency and stable external reference handling in the API-backed business process.

D:

“Expose only approved actions and enforce permissions and validation at the service boundary” concerns the alternative task “expose only approved actions and enforce permissions and validation at the service boundary”, but the stated failure is that an API consumer sends duplicate create requests after a timeout, generating two shipment records. The required measure is to define idempotency and stable external reference handling in the API-backed business process.

Question 286

At fictional Quayside Events, the Business Central development team is supporting event vendor payments and reviewing external-service integration during a sandbox design review (MB820-6.2-198). The observed development issue is that an API consumer sends duplicate create requests after a timeout, generating two shipment records. Which observed result would most clearly show the intended correction works?

  1. A repeated request does not create duplicate shipments.
  2. The caller gets the intended action outcome without bypassing document posting rules.
  3. The consumer can retrieve the authorized parent and its related lines consistently.
  4. The API payload omits protected fields for unauthorized consumers.

Explanation

Correct Answer

A:

This is the outcome that directly verifies the intended correction: a repeated request does not create duplicate shipments. The related solution is to define idempotency and stable external reference handling in the API-backed business process; it is based on the principle that reliable APIs must account for retries and ambiguous response outcomes.

Incorrect Answers

B:

“The caller gets the intended action outcome without bypassing document posting rules” concerns the separate step “implement or expose an appropriate supported bound/unbound action that invokes validated posting logic”. The reported issue is that an API consumer sends duplicate create requests after a timeout, generating two shipment records, so the direct response is to a repeated request does not create duplicate shipments.

C:

“The consumer can retrieve the authorized parent and its related lines consistently” concerns the alternative task “design appropriate API page parts or supported related entity navigation with stable keys”, but the stated failure is that an API consumer sends duplicate create requests after a timeout, generating two shipment records. The required measure is to a repeated request does not create duplicate shipments.

D:

The proposed “The API payload omits protected fields for unauthorized consumers” tests a different control: expose only the minimal approved fields and apply entitlement and permission rules. The reported condition is that an API consumer sends duplicate create requests after a timeout, generating two shipment records; the more direct action is to a repeated request does not create duplicate shipments.

Question 287

At fictional Quayside Events, the Business Central development team is supporting event vendor payments and reviewing external-service integration during a sandbox design review (MB820-6.2-198). The observed development issue is that an API consumer sends duplicate create requests after a timeout, generating two shipment records. Which recurring engineering check would best prevent this issue from returning?

  1. Validate endpoints and schema with consumer contract tests.
  2. Run negative authorization tests against API endpoints.
  3. Test multi-line and missing-child API responses.
  4. Test duplicate submission and late response scenarios.

Explanation

Correct Answer

D:

The ongoing check is to test duplicate submission and late response scenarios. This helps detect recurrence when an API consumer sends duplicate create requests after a timeout, generating two shipment records. The associated correction is to define idempotency and stable external reference handling in the API-backed business process; a confirming result is that a repeated request does not create duplicate shipments.

Incorrect Answers

A:

“Validate endpoints and schema with consumer contract tests” concerns the separate step “create an appropriately configured API page with stable entity name, entity set, publisher and version properties”. The reported issue is that an API consumer sends duplicate create requests after a timeout, generating two shipment records, so the direct response is to test duplicate submission and late response scenarios.

B:

“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 an API consumer sends duplicate create requests after a timeout, generating two shipment records. The required measure is to test duplicate submission and late response scenarios.

C:

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 an API consumer sends duplicate create requests after a timeout, generating two shipment records; the more direct action is to test duplicate submission and late response scenarios.

Question 288

At fictional Quayside Events, the Business Central development team is supporting event vendor payments and reviewing external-service integration during a sandbox design review (MB820-6.2-198). The observed development issue is that an API consumer sends duplicate create requests after a timeout, generating two shipment records. Which Business Central or AL development principle best explains the right response?

  1. API versioning protects downstream integration dependencies.
  2. Reliable APIs must account for retries and ambiguous response outcomes.
  3. Business operations often require action endpoints, not raw field mutation.
  4. Business Central API extensibility has object-type boundaries.

Explanation

Correct Answer

B:

The governing principle is that reliable APIs must account for retries and ambiguous response outcomes. The engineering response is to define idempotency and stable external reference handling in the API-backed business process. Verification should show that a repeated request does not create duplicate shipments.

Incorrect Answers

A:

“API versioning protects downstream integration dependencies” concerns the alternative task “preserve compatible contracts or introduce a deliberate versioned API and migration path”, but the stated failure is that an API consumer sends duplicate create requests after a timeout, generating two shipment records. The required measure is to define idempotency and stable external reference handling in the API-backed business process.

C:

“Business operations often require action endpoints, not raw field mutation” supports the separate task “implement or expose an appropriate supported bound/unbound action that invokes validated posting logic”, not the reported problem: an API consumer sends duplicate create requests after a timeout, generating two shipment records. This case instead calls for “define idempotency and stable external reference handling in the API-backed business process”.

D:

“Business Central API extensibility has object-type boundaries” concerns the separate step “publish a compatible new API contract or supported API page design rather than assuming API page extension is available”. The reported issue is that an API consumer sends duplicate create requests after a timeout, generating two shipment records, so the direct response is to define idempotency and stable external reference handling in the API-backed business process.

Question 289

At fictional Summit Parts, the Business Central development team is supporting after-sales order processing and reviewing automated testing and diagnostics during a production readiness review (MB820-5.2-180). The observed development issue is that a background AL job intermittently fails on invalid source records but the exception is swallowed before observability. Which recurring engineering check would best prevent this issue from returning?

  1. Alert on sustained failed-job counters.
  2. Review p95 durations for critical reports after deploy.
  3. Track custom-event rates after major feature releases.
  4. Review telemetry coverage after critical workflow changes.

Explanation

Correct Answer

A:

The ongoing check is to alert on sustained failed-job counters. This helps detect recurrence when a background AL job intermittently fails on invalid source records but the exception is swallowed before observability. The associated correction is to emit safe failure signals and preserve actionable error outcomes in the job path; a confirming result is that operations can identify failed batches and trace their cause without leaked payloads.

Incorrect Answers

B:

“Review p95 durations for critical reports after deploy” supports the separate task “measure report-specific duration and relevant operation dimensions over comparable periods”, not the reported problem: a background AL job intermittently fails on invalid source records but the exception is swallowed before observability. This case instead calls for “Alert on sustained failed-job counters”.

C:

“Track custom-event rates after major feature releases” concerns the separate step “use appropriate verbosity and targeted instrumentation for meaningful events”. The reported issue is that a background AL job intermittently fails on invalid source records but the exception is swallowed before observability, so the direct response is to alert on sustained failed-job counters.

D:

“Review telemetry coverage after critical workflow changes” concerns the alternative task “configure telemetry and use meaningful dimensions to link the operation to the affected environment”, but the stated failure is that a background AL job intermittently fails on invalid source records but the exception is swallowed before observability. The required measure is to alert on sustained failed-job counters.

Question 290

At fictional Summit Parts, the Business Central development team is supporting after-sales order processing and reviewing automated testing and diagnostics during a production readiness review (MB820-5.2-180). The observed development issue is that a background AL job intermittently fails on invalid source records but the exception is swallowed before observability. Which Business Central or AL development principle best explains the right response?

  1. Performance telemetry needs meaningful operation-level segmentation.
  2. Silent background failures require explicit diagnostics.
  3. Telemetry event contracts should be versioned deliberately.
  4. Telemetry should balance useful signal and operational overhead.

Explanation

Correct Answer

B:

The governing principle is that silent background failures require explicit diagnostics. The engineering response is to emit safe failure signals and preserve actionable error outcomes in the job path. Verification should show that operations can identify failed batches and trace their cause without leaked payloads.

Incorrect Answers

A:

“Performance telemetry needs meaningful operation-level segmentation” supports the separate task “measure report-specific duration and relevant operation dimensions over comparable periods”, not the reported problem: a background AL job intermittently fails on invalid source records but the exception is swallowed before observability. This case instead calls for “emit safe failure signals and preserve actionable error outcomes in the job path”.

C:

“Telemetry event contracts should be versioned deliberately” concerns the alternative task “use stable event identifiers and a controlled schema for emitted telemetry”, but the stated failure is that a background AL job intermittently fails on invalid source records but the exception is swallowed before observability. The required measure is to emit safe failure signals and preserve actionable error outcomes in the job path.

D:

The proposed “Telemetry should balance useful signal and operational overhead” tests a different control: use appropriate verbosity and targeted instrumentation for meaningful events. The reported condition is that a background AL job intermittently fails on invalid source records but the exception is swallowed before observability; the more direct action is to emit safe failure signals and preserve actionable error outcomes in the job path.