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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 71

Question 700

At fictional Zincfield Sports, the Business Central development team is supporting equipment sales and replenishment and reviewing object model and application extensibility during an extension maintenance sprint (MB820-3.1-058). The observed development issue is that a table extension adds a required field to existing records without an initialization strategy. Which observed result would most clearly show the intended correction works?

  1. The standard Customer table remains intact and the field is visible after extension installation.
  2. The approved role sees the field in the expected group without replacing the base page.
  3. Installation succeeds and historical records remain valid under the new schema.
  4. The UI supports header navigation and related line entry using the intended structure.

Explanation

Correct Answer

C:

This is the outcome that directly verifies the intended correction: installation succeeds and historical records remain valid under the new schema. The related solution is to use a compatible field design and controlled initialization that respects existing rows; it is based on the principle that data schema extensions must account for previously stored records.

Incorrect Answers

A:

“The standard Customer table remains intact and the field is visible after extension installation” concerns the alternative task “create a tableextension to add the field and a pageextension to surface it on the customer page”, but the stated failure is that a table extension adds a required field to existing records without an initialization strategy. The required measure is to installation succeeds and historical records remain valid under the new schema.

B:

The proposed “The approved role sees the field in the expected group without replacing the base page” tests a different control: add the field in the appropriate pageextension layout section and verify ApplicationArea and permissions. The reported condition is that a table extension adds a required field to existing records without an initialization strategy; the more direct action is to installation succeeds and historical records remain valid under the new schema.

D:

“The UI supports header navigation and related line entry using the intended structure” concerns the separate step “select the proper Document page pattern and related subpage for line data”. The reported issue is that a table extension adds a required field to existing records without an initialization strategy, so the direct response is to installation succeeds and historical records remain valid under the new schema.

Question 701

At fictional Maple Learning, the Business Central development team is supporting training enrollment finance and reviewing AL business logic and user experience during a localization review (MB820-4.2-138). The observed development issue is that an extension writes directly to posted ledger entries to correct a business document. Which Business Central or AL development principle best explains the right response?

  1. Business state should be represented with meaningful constrained values.
  2. Business Central document standards separate headers from repeating line details.
  3. Posted entries represent audited transactional history.
  4. Document lifecycle states should distinguish tentative work from committed postings.

Explanation

Correct Answer

C:

The governing principle is that posted entries represent audited transactional history. The engineering response is to follow the documented posting and corrective-document patterns instead of editing immutable history. Verification should show that the adjustment is traceable through supported correction records without rewriting posted history.

Incorrect Answers

A:

The proposed “Business state should be represented with meaningful constrained values” tests a different control: use an appropriate enum/state model with controlled business transitions. The reported condition is that an extension writes directly to posted ledger entries to correct a business document; the more direct action is to follow the documented posting and corrective-document patterns instead of editing immutable history.

B:

“Business Central document standards separate headers from repeating line details” supports the separate task “use document header and line table patterns with proper linked records”, not the reported problem: an extension writes directly to posted ledger entries to correct a business document. This case instead calls for “follow the documented posting and corrective-document patterns instead of editing immutable history”.

D:

“Document lifecycle states should distinguish tentative work from committed postings” concerns the alternative task “keep unposted documents and posted accounting entries separate in the lifecycle”, but the stated failure is that an extension writes directly to posted ledger entries to correct a business document. The required measure is to follow the documented posting and corrective-document patterns instead of editing immutable history.

Question 702

At fictional Maple Learning, the Business Central development team is supporting training enrollment finance and reviewing AL business logic and user experience during a localization review (MB820-4.2-138). The observed development issue is that an extension writes directly to posted ledger entries to correct a business document. Which observed result would most clearly show the intended correction works?

  1. Preferences persist independently of temporary transactional journal lines.
  2. Document numbers remain unique and traceable across posting operations.
  3. Repeated imports identify existing vendors rather than multiplying records.
  4. The adjustment is traceable through supported correction records without rewriting posted history.

Explanation

Correct Answer

D:

This is the outcome that directly verifies the intended correction: the adjustment is traceable through supported correction records without rewriting posted history. The related solution is to follow the documented posting and corrective-document patterns instead of editing immutable history; it is based on the principle that posted entries represent audited transactional history.

Incorrect Answers

A:

“Preferences persist independently of temporary transactional journal lines” supports the separate task “store stable customer attributes in an appropriate master-data table or extension field”, not the reported problem: an extension writes directly to posted ledger entries to correct a business document. This case instead calls for “The adjustment is traceable through supported correction records without rewriting posted history”.

B:

“Document numbers remain unique and traceable across posting operations” concerns the separate step “use supported numbering and posting design patterns for document identifiers”. The reported issue is that an extension writes directly to posted ledger entries to correct a business document, so the direct response is to the adjustment is traceable through supported correction records without rewriting posted history.

C:

“Repeated imports identify existing vendors rather than multiplying records” concerns the alternative task “use stable vendor identifiers and defined match/merge rules for master data”, but the stated failure is that an extension writes directly to posted ledger entries to correct a business document. The required measure is to the adjustment is traceable through supported correction records without rewriting posted history.

Question 703

At fictional Maple Learning, the Business Central development team is supporting training enrollment finance and reviewing AL business logic and user experience during a localization review (MB820-4.2-138). The observed development issue is that an extension writes directly to posted ledger entries to correct a business document. Which AL development or design response most directly addresses this issue?

  1. Represent repeating related records with an appropriate child table and explicit relationship.
  2. Use stable vendor identifiers and defined match/merge rules for master data.
  3. Follow the documented posting and corrective-document patterns instead of editing immutable history.
  4. Store stable customer attributes in an appropriate master-data table or extension field.

Explanation

Correct Answer

C:

The most direct corrective response is to follow the documented posting and corrective-document patterns instead of editing immutable history. This addresses the specific failure where an extension writes directly to posted ledger entries to correct a business document. Acceptance evidence is that the adjustment is traceable through supported correction records without rewriting posted history.

Incorrect Answers

A:

“Represent repeating related records with an appropriate child table and explicit relationship” concerns the separate step “represent repeating related records with an appropriate child table and explicit relationship”. The reported issue is that an extension writes directly to posted ledger entries to correct a business document, so the direct response is to follow the documented posting and corrective-document patterns instead of editing immutable history.

B:

“Use stable vendor identifiers and defined match/merge rules for master data” concerns the alternative task “use stable vendor identifiers and defined match/merge rules for master data”, but the stated failure is that an extension writes directly to posted ledger entries to correct a business document. The required measure is to follow the documented posting and corrective-document patterns instead of editing immutable history.

D:

“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: an extension writes directly to posted ledger entries to correct a business document. This case instead calls for “follow the documented posting and corrective-document patterns instead of editing immutable history”.

Question 704

At fictional Maple Learning, the Business Central development team is supporting training enrollment finance and reviewing AL business logic and user experience during a localization review (MB820-4.2-138). The observed development issue is that an extension writes directly to posted ledger entries to correct a business document. Which recurring engineering check would best prevent this issue from returning?

  1. Test multi-line posting and reporting after schema changes.
  2. Review schema for repeated fields before release.
  3. Block direct mutation of posted business records in code review.
  4. Test API-created and page-created records against the same rules.

Explanation

Correct Answer

C:

The ongoing check is to block direct mutation of posted business records in code review. This helps detect recurrence when an extension writes directly to posted ledger entries to correct a business document. The associated correction is to follow the documented posting and corrective-document patterns instead of editing immutable history; a confirming result is that the adjustment is traceable through supported correction records without rewriting posted history.

Incorrect Answers

A:

“Test multi-line posting and reporting after schema changes” concerns the alternative task “use document header and line table patterns with proper linked records”, but the stated failure is that an extension writes directly to posted ledger entries to correct a business document. The required measure is to block direct mutation of posted business records in code review.

B:

The proposed “Review schema for repeated fields before release” tests a different control: represent repeating related records with an appropriate child table and explicit relationship. The reported condition is that an extension writes directly to posted ledger entries to correct a business document; the more direct action is to block direct mutation of posted business records in code review.

D:

“Test API-created and page-created records against the same rules” concerns the separate step “use standard field validation and business rule entry points before database writes”. The reported issue is that an extension writes directly to posted ledger entries to correct a business document, so the direct response is to block direct mutation of posted business records in code review.

Question 705

At fictional Yorkshire Housing, the Business Central development team is supporting property service charges and reviewing extension environment and deployment preparation during an AL developer handoff (MB820-2.1-035). The observed development issue is that a developer adds a library but the compiler reports unresolved objects even after a successful AL package build. Which Business Central or AL development principle best explains the right response?

  1. Compilation compatibility requires deliberate runtime targeting.
  2. Development isolation reduces operational and data risks.
  3. Compilation depends on both symbol availability and declared app relationships.
  4. Development connection configuration must identify the target environment accurately.

Explanation

Correct Answer

C:

The governing principle is that compilation depends on both symbol availability and declared app relationships. The engineering response is to download current symbols and declare the required app dependency with compatible versions. Verification should show that intelliSense and the compiler resolve the referenced symbols from the intended libraries.

Incorrect Answers

A:

The proposed “Compilation compatibility requires deliberate runtime targeting” tests a different control: align the runtime and platform/application version fields with the supported target environment. The reported condition is that a developer adds a library but the compiler reports unresolved objects even after a successful AL package build; the more direct action is to download current symbols and declare the required app dependency with compatible versions.

B:

“Development isolation reduces operational and data risks” supports the separate task “create and target a dedicated sandbox environment with nonproduction data and restricted permissions”, not the reported problem: a developer adds a library but the compiler reports unresolved objects even after a successful AL package build. This case instead calls for “download current symbols and declare the required app dependency with compatible versions”.

D:

“Development connection configuration must identify the target environment accurately” concerns the alternative task “correct the server, environment name, tenant and authentication settings for the intended Business Central sandbox”, but the stated failure is that a developer adds a library but the compiler reports unresolved objects even after a successful AL package build. The required measure is to download current symbols and declare the required app dependency with compatible versions.

Question 706

At fictional Yorkshire Housing, the Business Central development team is supporting property service charges and reviewing extension environment and deployment preparation during an AL developer handoff (MB820-2.1-035). The observed development issue is that a developer adds a library but the compiler reports unresolved objects even after a successful AL package build. Which recurring engineering check would best prevent this issue from returning?

  1. Validate separate app versioning and compilation in CI.
  2. Verify sandbox URLs and profiles before enabling debugging.
  3. Block production endpoints in development launch profiles.
  4. Run clean symbol restoration on a fresh CI agent.

Explanation

Correct Answer

D:

The ongoing check is to run clean symbol restoration on a fresh CI agent. This helps detect recurrence when a developer adds a library but the compiler reports unresolved objects even after a successful AL package build. The associated correction is to download current symbols and declare the required app dependency with compatible versions; a confirming result is that intelliSense and the compiler resolve the referenced symbols from the intended libraries.

Incorrect Answers

A:

“Validate separate app versioning and compilation in CI” supports the separate task “configure an appropriate multi-root workspace and preserve distinct app manifests and dependencies”, not the reported problem: a developer adds a library but the compiler reports unresolved objects even after a successful AL package build. This case instead calls for “Run clean symbol restoration on a fresh CI agent”.

B:

“Verify sandbox URLs and profiles before enabling debugging” concerns the separate step “correct the server, environment name, tenant and authentication settings for the intended Business Central sandbox”. The reported issue is that a developer adds a library but the compiler reports unresolved objects even after a successful AL package build, so the direct response is to run clean symbol restoration on a fresh CI agent.

C:

“Block production endpoints in development launch profiles” concerns the alternative task “create and target a dedicated sandbox environment with nonproduction data and restricted permissions”, but the stated failure is that a developer adds a library but the compiler reports unresolved objects even after a successful AL package build. The required measure is to run clean symbol restoration on a fresh CI agent.

Question 707

At fictional Yorkshire Housing, the Business Central development team is supporting property service charges and reviewing extension environment and deployment preparation during an AL developer handoff (MB820-2.1-035). The observed development issue is that a developer adds a library but the compiler reports unresolved objects even after a successful AL package build. Which observed result would most clearly show the intended correction works?

  1. Experimental deployments do not modify live company data or affect productive users.
  2. IntelliSense and the compiler resolve the referenced symbols from the intended libraries.
  3. The extension compiles and deploys against the actual target version.
  4. Each developer connects only to the tenant and sandbox they are authorized to use.

Explanation

Correct Answer

B:

This is the outcome that directly verifies the intended correction: intelliSense and the compiler resolve the referenced symbols from the intended libraries. The related solution is to download current symbols and declare the required app dependency with compatible versions; it is based on the principle that compilation depends on both symbol availability and declared app relationships.

Incorrect Answers

A:

“Experimental deployments do not modify live company data or affect productive users” concerns the separate step “create and target a dedicated sandbox environment with nonproduction data and restricted permissions”. The reported issue is that a developer adds a library but the compiler reports unresolved objects even after a successful AL package build, so the direct response is to intelliSense and the compiler resolve the referenced symbols from the intended libraries.

C:

The proposed “The extension compiles and deploys against the actual target version” tests a different control: align the runtime and platform/application version fields with the supported target environment. The reported condition is that a developer adds a library but the compiler reports unresolved objects even after a successful AL package build; the more direct action is to intelliSense and the compiler resolve the referenced symbols from the intended libraries.

D:

“Each developer connects only to the tenant and sandbox they are authorized to use” supports the separate task “use separate, minimally scoped development configurations rather than shared cross-customer endpoints”, not the reported problem: a developer adds a library but the compiler reports unresolved objects even after a successful AL package build. This case instead calls for “IntelliSense and the compiler resolve the referenced symbols from the intended libraries”.

Question 708

At fictional Yorkshire Housing, the Business Central development team is supporting property service charges and reviewing extension environment and deployment preparation during an AL developer handoff (MB820-2.1-035). The observed development issue is that a developer adds a library but the compiler reports unresolved objects even after a successful AL package build. Which AL development or design response most directly addresses this issue?

  1. Align the runtime and platform/application version fields with the supported target environment.
  2. Configure an appropriate multi-root workspace and preserve distinct app manifests and dependencies.
  3. Install the current AL Language extension in Visual Studio Code and use its compiler and editor services.
  4. Download current symbols and declare the required app dependency with compatible versions.

Explanation

Correct Answer

D:

The most direct corrective response is to download current symbols and declare the required app dependency with compatible versions. This addresses the specific failure where a developer adds a library but the compiler reports unresolved objects even after a successful AL package build. Acceptance evidence is that intelliSense and the compiler resolve the referenced symbols from the intended libraries.

Incorrect Answers

A:

“Align the runtime and platform/application version fields with the supported target environment” concerns the alternative task “align the runtime and platform/application version fields with the supported target environment”, but the stated failure is that a developer adds a library but the compiler reports unresolved objects even after a successful AL package build. The required measure is to download current symbols and declare the required app dependency with compatible versions.

B:

The proposed “Configure an appropriate multi-root workspace and preserve distinct app manifests and dependencies” tests a different control: configure an appropriate multi-root workspace and preserve distinct app manifests and dependencies. The reported condition is that a developer adds a library but the compiler reports unresolved objects even after a successful AL package build; the more direct action is to download current symbols and declare the required app dependency with compatible versions.

C:

“Install the current AL Language extension in Visual Studio Code and use its compiler and editor services” 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 adds a library but the compiler reports unresolved objects even after a successful AL package build. This case instead calls for “download current symbols and declare the required app dependency with compatible versions”.

Question 709

At fictional Glenhaven Foods, the Business Central development team is supporting inventory traceability and purchasing and reviewing solution architecture design during a source-control pull request (MB820-1.1-005). The observed development issue is that a customer wants Microsoft to patch custom AL code during each cloud release. Which recurring engineering check would best prevent this issue from returning?

  1. Review object references and extension points for correct application layer ownership.
  2. Rehearse extension compatibility against preview or sandbox release environments.
  3. Verify authentication and data ownership before adding any Microsoft 365 integration.
  4. Check app dependencies during every automated build and upgrade.

Explanation

Correct Answer

B:

The ongoing check is to rehearse extension compatibility against preview or sandbox release environments. This helps detect recurrence when a customer wants Microsoft to patch custom AL code during each cloud release. The associated correction is to assign extension code ownership and compatibility testing to the publisher while Microsoft maintains the online platform; a confirming result is that the release plan distinguishes Microsoft-managed platform updates from customer-managed extension releases.

Incorrect Answers

A:

The proposed “Review object references and extension points for correct application layer ownership” tests a different control: use the System Application APIs for reusable system capabilities and extend the Base Application for business processes. The reported condition is that a customer wants Microsoft to patch custom AL code during each cloud release; the more direct action is to rehearse extension compatibility against preview or sandbox release environments.

C:

“Verify authentication and data ownership before adding any Microsoft 365 integration” concerns the separate step “select supported Business Central capabilities and explicit service integrations for Microsoft 365 workflows”. The reported issue is that a customer wants Microsoft to patch custom AL code during each cloud release, so the direct response is to rehearse extension compatibility against preview or sandbox release environments.

D:

“Check app dependencies during every automated build and upgrade” concerns the alternative task “separate independently maintained capabilities into versioned extension apps with explicit dependencies”, but the stated failure is that a customer wants Microsoft to patch custom AL code during each cloud release. The required measure is to rehearse extension compatibility against preview or sandbox release environments.

Question 710

At fictional Glenhaven Foods, the Business Central development team is supporting inventory traceability and purchasing and reviewing solution architecture design during a source-control pull request (MB820-1.1-005). The observed development issue is that a customer wants Microsoft to patch custom AL code during each cloud release. Which observed result would most clearly show the intended correction works?

  1. The release plan distinguishes Microsoft-managed platform updates from customer-managed extension releases.
  2. Architecture diagrams correctly locate server-side business logic and authoritative records.
  3. An isolated-tenant test shows no unintended cross-tenant records and approved integration transfers only permitted data.
  4. A sandbox update detects API incompatibility before the live environment is updated.

Explanation

Correct Answer

A:

This is the outcome that directly verifies the intended correction: the release plan distinguishes Microsoft-managed platform updates from customer-managed extension releases. The related solution is to assign extension code ownership and compatibility testing to the publisher while Microsoft maintains the online platform; it is based on the principle that saaS servicing does not transfer responsibility for third-party app quality.

Incorrect Answers

B:

“Architecture diagrams correctly locate server-side business logic and authoritative records” concerns the separate step “document how the browser client, service tier, AL extensions and managed data platform participate in operations”. The reported issue is that a customer wants Microsoft to patch custom AL code during each cloud release, so the direct response is to the release plan distinguishes Microsoft-managed platform updates from customer-managed extension releases.

C:

“An isolated-tenant test shows no unintended cross-tenant records and approved integration transfers only permitted data” concerns the alternative task “design explicit authorized integration rather than assuming Business Central tenant databases share company data”, but the stated failure is that a customer wants Microsoft to patch custom AL code during each cloud release. The required measure is to the release plan distinguishes Microsoft-managed platform updates from customer-managed extension releases.

D:

The proposed “A sandbox update detects API incompatibility before the live environment is updated” tests a different control: track the platform release cycle and qualify extension versions against available compatibility signals. The reported condition is that a customer wants Microsoft to patch custom AL code during each cloud release; the more direct action is to the release plan distinguishes Microsoft-managed platform updates from customer-managed extension releases.