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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 5

Question 40

At fictional Northbridge Transport, the Business Central development team is supporting route billing and inventory and reviewing external-service integration during an extension maintenance sprint (MB820-6.2-193). The observed development issue is that a partner needs a supported CRUD API for a custom warehouse entity but the team exposes an interactive card page. Which recurring engineering check would best prevent this issue from returning?

  1. Audit API field lists and permission behavior after schema changes.
  2. Test multi-line and missing-child API responses.
  3. Test data freshness and consistency assumptions before enabling read scale-out.
  4. Validate endpoints and schema with consumer contract tests.

Explanation

Correct Answer

D:

The ongoing check is to validate endpoints and schema with consumer contract tests. This helps detect recurrence when a partner needs a supported CRUD API for a custom warehouse entity but the team exposes an interactive card page. The associated correction is to create an appropriately configured API page with stable entity name, entity set, publisher and version properties; a confirming result is that the partner can retrieve and update authorized records through the declared API contract.

Incorrect Answers

A:

“Audit API field lists and permission behavior after schema changes” concerns the alternative task “expose only the minimal approved fields and apply entitlement and permission rules”, but the stated failure is that a partner needs a supported CRUD API for a custom warehouse entity but the team exposes an interactive card page. The required measure is to validate endpoints and schema with consumer contract tests.

B:

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 partner needs a supported CRUD API for a custom warehouse entity but the team exposes an interactive card page; the more direct action is to validate endpoints and schema with consumer contract tests.

C:

“Test data freshness and consistency assumptions before enabling read scale-out” supports the separate task “evaluate supported read scale-out patterns for appropriate read workloads without compromising consistency needs”, not the reported problem: a partner needs a supported CRUD API for a custom warehouse entity but the team exposes an interactive card page. This case instead calls for “Validate endpoints and schema with consumer contract tests”.

Question 41

At fictional Glenhaven Foods, the Business Central development team is supporting inventory traceability and purchasing and reviewing object model and application extensibility during a troubleshooting exercise (MB820-3.5-113). The observed development issue is that a developer assumes disabling a page action prevents API requests from changing protected data. Which AL development or design response most directly addresses this issue?

  1. Use documented permissions properties or least-privilege execution design where applicable.
  2. Model supported entitlements and application rights separately, testing their combined effect.
  3. Enforce access using resource-side permission sets and protected code paths.
  4. Trim permissions to the exact object set and operations required for business tasks.

Explanation

Correct Answer

C:

The most direct corrective response is to enforce access using resource-side permission sets and protected code paths. This addresses the specific failure where a developer assumes disabling a page action prevents API requests from changing protected data. Acceptance evidence is that an unauthorized API call fails even when the UI action is hidden.

Incorrect Answers

A:

The proposed “Use documented permissions properties or least-privilege execution design where applicable” tests a different control: use documented permissions properties or least-privilege execution design where applicable. The reported condition is that a developer assumes disabling a page action prevents API requests from changing protected data; the more direct action is to enforce access using resource-side permission sets and protected code paths.

B:

“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: a developer assumes disabling a page action prevents API requests from changing protected data. This case instead calls for “enforce access using resource-side permission sets and protected code paths”.

D:

“Trim permissions to the exact object set and operations required for business tasks” concerns the alternative task “trim permissions to the exact object set and operations required for business tasks”, but the stated failure is that a developer assumes disabling a page action prevents API requests from changing protected data. The required measure is to enforce access using resource-side permission sets and protected code paths.

Question 42

At fictional Glenhaven Foods, the Business Central development team is supporting inventory traceability and purchasing and reviewing object model and application extensibility during a troubleshooting exercise (MB820-3.5-113). The observed development issue is that a developer assumes disabling a page action prevents API requests from changing protected data. Which observed result would most clearly show the intended correction works?

  1. The feature works while unrelated customer tables remain inaccessible.
  2. An unauthorized API call fails even when the UI action is hidden.
  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: an unauthorized API call fails even when the UI action is hidden. The related solution is to enforce access using resource-side permission sets and protected code paths; it is based on the principle that uI visibility is not a security boundary.

Incorrect Answers

A:

“The feature works while unrelated customer tables remain inaccessible” supports the separate task “trim permissions to the exact object set and operations required for business tasks”, not the reported problem: a developer assumes disabling a page action prevents API requests from changing protected data. This case instead calls for “An unauthorized API call fails even when the UI action is hidden”.

C:

“Users with the intended license retain approved features while restricted capabilities remain unavailable” concerns the alternative task “model supported entitlements and application rights separately, testing their combined effect”, but the stated failure is that a developer assumes disabling a page action prevents API requests from changing protected data. The required measure is to an unauthorized API call fails even when the UI action is hidden.

D:

The proposed “Authorized users can perform required operations on the new table only” tests a different control: add the table-data rights to an appropriate permissionset or permissionsetextension. The reported condition is that a developer assumes disabling a page action prevents API requests from changing protected data; the more direct action is to an unauthorized API call fails even when the UI action is hidden.

Question 43

At fictional Glenhaven Foods, the Business Central development team is supporting inventory traceability and purchasing and reviewing object model and application extensibility during a troubleshooting exercise (MB820-3.5-113). The observed development issue is that a developer assumes disabling a page action prevents API requests from changing protected data. Which recurring engineering check would best prevent this issue from returning?

  1. Audit privileged codeunit entry points.
  2. Run explicit negative authorization tests for sensitive operations.
  3. Test API and background code paths against role permissions.
  4. Run functional smoke tests with nonadmin users.

Explanation

Correct Answer

C:

The ongoing check is to test API and background code paths against role permissions. This helps detect recurrence when a developer assumes disabling a page action prevents API requests from changing protected data. The associated correction is to enforce access using resource-side permission sets and protected code paths; a confirming result is that an unauthorized API call fails even when the UI action is hidden.

Incorrect Answers

A:

“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 developer assumes disabling a page action prevents API requests from changing protected data, so the direct response is to test API and background code paths against role permissions.

B:

“Run explicit negative authorization tests for sensitive operations” concerns the alternative task “assign a role with read rights and no unauthorized edit permissions to the relevant table data”, but the stated failure is that a developer assumes disabling a page action prevents API requests from changing protected data. The required measure is to test API and background code paths against role permissions.

D:

“Run functional smoke tests with nonadmin users” supports the separate task “identify required object/table permissions and provide the narrowest supported permission set”, not the reported problem: a developer assumes disabling a page action prevents API requests from changing protected data. This case instead calls for “Test API and background code paths against role permissions”.

Question 44

At fictional Glenhaven Foods, the Business Central development team is supporting inventory traceability and purchasing and reviewing object model and application extensibility during a troubleshooting exercise (MB820-3.5-113). The observed development issue is that a developer assumes disabling a page action prevents API requests from changing protected data. Which Business Central or AL development principle best explains the right response?

  1. Data model evolution often requires corresponding permission model updates.
  2. UI visibility is not a security boundary.
  3. Entitlements and permission sets fulfill different access-control functions.
  4. Read, insert, modify and delete privileges must be scoped independently.

Explanation

Correct Answer

B:

The governing principle is that uI visibility is not a security boundary. The engineering response is to enforce access using resource-side permission sets and protected code paths. Verification should show that an unauthorized API call fails even when the UI action is hidden.

Incorrect Answers

A:

“Data model evolution often requires corresponding permission model updates” concerns the alternative task “add the table-data rights to an appropriate permissionset or permissionsetextension”, but the stated failure is that a developer assumes disabling a page action prevents API requests from changing protected data. The required measure is to enforce access using resource-side permission sets and protected code paths.

C:

“Entitlements and permission sets fulfill different access-control functions” supports the separate task “model supported entitlements and application rights separately, testing their combined effect”, not the reported problem: a developer assumes disabling a page action prevents API requests from changing protected data. This case instead calls for “enforce access using resource-side permission sets and protected code paths”.

D:

“Read, insert, modify and delete privileges must be scoped independently” 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 developer assumes disabling a page action prevents API requests from changing protected data, so the direct response is to enforce access using resource-side permission sets and protected code paths.

Question 45

At fictional Brookstone Labs, the Business Central development team is supporting research procurement and reviewing automated testing and diagnostics during a production readiness review (MB820-5.2-172). The observed development issue is that a report runtime increases after a code change but the team compares only total tenant request counts. Which Business Central or AL development principle best explains the right response?

  1. Silent background failures require explicit diagnostics.
  2. Performance telemetry needs meaningful operation-level segmentation.
  3. Monitoring only successful operations conceals reliability regressions.
  4. Telemetry generation and telemetry collection are separate setup steps.

Explanation

Correct Answer

B:

The governing principle is that performance telemetry needs meaningful operation-level segmentation. The engineering response is to measure report-specific duration and relevant operation dimensions over comparable periods. Verification should show that the regression is isolated to the changed report rather than misattributed to total traffic.

Incorrect Answers

A:

The proposed “Silent background failures require explicit diagnostics” tests a different control: emit safe failure signals and preserve actionable error outcomes in the job path. The reported condition is that a report runtime increases after a code change but the team compares only total tenant request counts; the more direct action is to measure report-specific duration and relevant operation dimensions over comparable periods.

C:

“Monitoring only successful operations conceals reliability regressions” concerns the separate step “instrument both success and failure paths with status, duration and safe error identifiers”. The reported issue is that a report runtime increases after a code change but the team compares only total tenant request counts, so the direct response is to measure report-specific duration and relevant operation dimensions over comparable periods.

D:

“Telemetry generation and telemetry collection are separate setup steps” concerns the alternative task “configure a supported telemetry destination and confirm the extension's emitted events reach it”, but the stated failure is that a report runtime increases after a code change but the team compares only total tenant request counts. The required measure is to measure report-specific duration and relevant operation dimensions over comparable periods.

Question 46

At fictional Brookstone Labs, the Business Central development team is supporting research procurement and reviewing automated testing and diagnostics during a production readiness review (MB820-5.2-172). The observed development issue is that a report runtime increases after a code change but the team compares only total tenant request counts. Which observed result would most clearly show the intended correction works?

  1. An alert identifies failing attempts and lets operators distinguish error classes.
  2. The investigation follows one request across relevant extension and platform events.
  3. The regression is isolated to the changed report rather than misattributed to total traffic.
  4. Existing monitoring queries keep working after the extension upgrade.

Explanation

Correct Answer

C:

This is the outcome that directly verifies the intended correction: the regression is isolated to the changed report rather than misattributed to total traffic. The related solution is to measure report-specific duration and relevant operation dimensions over comparable periods; it is based on the principle that performance telemetry needs meaningful operation-level segmentation.

Incorrect Answers

A:

“An alert identifies failing attempts and lets operators distinguish error classes” supports the separate task “instrument both success and failure paths with status, duration and safe error identifiers”, not the reported problem: a report runtime increases after a code change but the team compares only total tenant request counts. This case instead calls for “The regression is isolated to the changed report rather than misattributed to total traffic”.

B:

“The investigation follows one request across relevant extension and platform events” concerns the separate step “use supported telemetry correlation identifiers and span context where available”. The reported issue is that a report runtime increases after a code change but the team compares only total tenant request counts, so the direct response is to the regression is isolated to the changed report rather than misattributed to total traffic.

D:

The proposed “Existing monitoring queries keep working after the extension upgrade” tests a different control: use stable event identifiers and a controlled schema for emitted telemetry. The reported condition is that a report runtime increases after a code change but the team compares only total tenant request counts; the more direct action is to the regression is isolated to the changed report rather than misattributed to total traffic.

Question 47

At fictional Brookstone Labs, the Business Central development team is supporting research procurement and reviewing automated testing and diagnostics during a production readiness review (MB820-5.2-172). The observed development issue is that a report runtime increases after a code change but the team compares only total tenant request counts. Which recurring engineering check would best prevent this issue from returning?

  1. Check destination configuration before release.
  2. Track custom-event rates after major feature releases.
  3. Review p95 durations for critical reports after deploy.
  4. Review telemetry coverage after critical workflow changes.

Explanation

Correct Answer

C:

The ongoing check is to review p95 durations for critical reports after deploy. This helps detect recurrence when a report runtime increases after a code change but the team compares only total tenant request counts. The associated correction is to measure report-specific duration and relevant operation dimensions over comparable periods; a confirming result is that the regression is isolated to the changed report rather than misattributed to total traffic.

Incorrect Answers

A:

“Check destination configuration before release” concerns the separate step “configure a supported telemetry destination and confirm the extension's emitted events reach it”. The reported issue is that a report runtime increases after a code change but the team compares only total tenant request counts, so the direct response is to review p95 durations for critical reports after deploy.

B:

“Track custom-event rates after major feature releases” concerns the alternative task “use appropriate verbosity and targeted instrumentation for meaningful events”, but the stated failure is that a report runtime increases after a code change but the team compares only total tenant request counts. The required measure is to review p95 durations for critical reports after deploy.

D:

“Review telemetry coverage after critical workflow changes” supports the separate task “configure telemetry and use meaningful dimensions to link the operation to the affected environment”, not the reported problem: a report runtime increases after a code change but the team compares only total tenant request counts. This case instead calls for “Review p95 durations for critical reports after deploy”.

Question 48

At fictional Brookstone Labs, the Business Central development team is supporting research procurement and reviewing automated testing and diagnostics during a production readiness review (MB820-5.2-172). The observed development issue is that a report runtime increases after a code change but the team compares only total tenant request counts. Which AL development or design response most directly addresses this issue?

  1. Use stable event identifiers and a controlled schema for emitted telemetry.
  2. Measure report-specific duration and relevant operation dimensions over comparable periods.
  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

B:

The most direct corrective response is to measure report-specific duration and relevant operation dimensions over comparable periods. This addresses the specific failure where a report runtime increases after a code change but the team compares only total tenant request counts. Acceptance evidence is that the regression is isolated to the changed report rather than misattributed to total traffic.

Incorrect Answers

A:

“Use stable event identifiers and a controlled schema for emitted telemetry” concerns the alternative task “use stable event identifiers and a controlled schema for emitted telemetry”, but the stated failure is that a report runtime increases after a code change but the team compares only total tenant request counts. The required measure is to measure report-specific duration and relevant operation dimensions over comparable periods.

C:

“Configure a supported telemetry destination and confirm the extension's emitted events reach it” supports the separate task “configure a supported telemetry destination and confirm the extension's emitted events reach it”, not the reported problem: a report runtime increases after a code change but the team compares only total tenant request counts. This case instead calls for “measure report-specific duration and relevant operation dimensions over comparable periods”.

D:

“Instrument both success and failure paths with status, duration and safe error identifiers” concerns the separate step “instrument both success and failure paths with status, duration and safe error identifiers”. The reported issue is that a report runtime increases after a code change but the team compares only total tenant request counts, so the direct response is to measure report-specific duration and relevant operation dimensions over comparable periods.

Question 49

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 (MB820-3.1-061). The observed development issue is that a customer asks for a maintenance workspace with a compact set of actions and cues rather than ordinary record fields. 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. Select the proper Document page pattern and related subpage for line data.
  3. Use a supported extensible enum or enumextension where the target model allows extension.
  4. Implement or extend an appropriate Role Center page/profile with relevant activities and actions.

Explanation

Correct Answer

D:

The most direct corrective response is to implement or extend an appropriate Role Center page/profile with relevant activities and actions. This addresses the specific failure where a customer asks for a maintenance workspace with a compact set of actions and cues rather than ordinary record fields. Acceptance evidence is that the selected user role opens a workspace with approved cues and navigation.

Incorrect Answers

A:

The proposed “Model categories with a supported enum or related lookup table appropriate to extensibility requirements” tests a different control: model categories with a supported enum or related lookup table appropriate to extensibility requirements. The reported condition is that a customer asks for a maintenance workspace with a compact set of actions and cues rather than ordinary record fields; the more direct action is to implement or extend an appropriate Role Center page/profile with relevant activities and actions.

B:

“Select the proper Document page pattern and related subpage for line data” supports the separate task “select the proper Document page pattern and related subpage for line data”, not the reported problem: a customer asks for a maintenance workspace with a compact set of actions and cues rather than ordinary record fields. This case instead calls for “implement or extend an appropriate Role Center page/profile with relevant activities and actions”.

C:

“Use a supported extensible enum or enumextension where the target model allows extension” concerns the separate step “use a supported extensible enum or enumextension where the target model allows extension”. The reported issue is that a customer asks for a maintenance workspace with a compact set of actions and cues rather than ordinary record fields, so the direct response is to implement or extend an appropriate Role Center page/profile with relevant activities and actions.

Question 50

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 (MB820-3.1-061). The observed development issue is that a customer asks for a maintenance workspace with a compact set of actions and cues rather than ordinary record fields. Which Business Central or AL development principle best explains the right response?

  1. Extension objects modify existing behavior without editing Microsoft-owned object definitions.
  2. Structured reference values improve consistency and validation.
  3. Role Centers serve role-specific navigation rather than primary record editing.
  4. Calculated fields derive values from data rather than storing independent copies.

Explanation

Correct Answer

C:

The governing principle is that role Centers serve role-specific navigation rather than primary record editing. The engineering response is to implement or extend an appropriate Role Center page/profile with relevant activities and actions. Verification should show that the selected user role opens a workspace with approved cues and navigation.

Incorrect Answers

A:

“Extension objects modify existing behavior without editing Microsoft-owned object definitions” supports the separate task “create a tableextension to add the field and a pageextension to surface it on the customer page”, not the reported problem: a customer asks for a maintenance workspace with a compact set of actions and cues rather than ordinary record fields. This case instead calls for “implement or extend an appropriate Role Center page/profile with relevant activities and actions”.

B:

“Structured reference values improve consistency and validation” concerns the separate step “model categories with a supported enum or related lookup table appropriate to extensibility requirements”. The reported issue is that a customer asks for a maintenance workspace with a compact set of actions and cues rather than ordinary record fields, so the direct response is to implement or extend an appropriate Role Center page/profile with relevant activities and actions.

D:

The proposed “Calculated fields derive values from data rather than storing independent copies” tests a different control: define an appropriate FlowField with a CalcFormula and use CalcFields where required. The reported condition is that a customer asks for a maintenance workspace with a compact set of actions and cues rather than ordinary record fields; the more direct action is to implement or extend an appropriate Role Center page/profile with relevant activities and actions.