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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 14

Question 130

At fictional Trinity Trading, the Business Central development team is supporting cross-border purchasing and reviewing AL business logic and user experience during a code quality review (MB820-4.2-139). The observed development issue is that a table stores multiple unrelated customer shipping addresses in repeated address1/address2 fields. Which observed result would most clearly show the intended correction works?

  1. Posted transactions update related entries and balances consistently.
  2. Multiple order lines retain identity, quantities and document-level relationships.
  3. Repeated imports identify existing vendors rather than multiplying records.
  4. A customer may have multiple addresses without overwriting unrelated entries.

Explanation

Correct Answer

D:

This is the outcome that directly verifies the intended correction: a customer may have multiple addresses without overwriting unrelated entries. The related solution is to represent repeating related records with an appropriate child table and explicit relationship; it is based on the principle that normalized relationships model one-to-many master data correctly.

Incorrect Answers

A:

“Posted transactions update related entries and balances consistently” supports the separate task “use supported posting codeunits and integration events to preserve core business invariants”, not the reported problem: a table stores multiple unrelated customer shipping addresses in repeated address1/address2 fields. This case instead calls for “A customer may have multiple addresses without overwriting unrelated entries”.

B:

“Multiple order lines retain identity, quantities and document-level relationships” concerns the separate step “use document header and line table patterns with proper linked records”. The reported issue is that a table stores multiple unrelated customer shipping addresses in repeated address1/address2 fields, so the direct response is to a customer may have multiple addresses without overwriting unrelated entries.

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 a table stores multiple unrelated customer shipping addresses in repeated address1/address2 fields. The required measure is to a customer may have multiple addresses without overwriting unrelated entries.

Question 131

At fictional Trinity Trading, the Business Central development team is supporting cross-border purchasing and reviewing AL business logic and user experience during a code quality review (MB820-4.2-139). The observed development issue is that a table stores multiple unrelated customer shipping addresses in repeated address1/address2 fields. 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. Follow the documented posting and corrective-document patterns instead of editing immutable history.
  3. Use an appropriate enum/state model with controlled business transitions.
  4. Use stable vendor identifiers and defined match/merge rules for master data.

Explanation

Correct Answer

A:

The most direct corrective response is to represent repeating related records with an appropriate child table and explicit relationship. This addresses the specific failure where a table stores multiple unrelated customer shipping addresses in repeated address1/address2 fields. Acceptance evidence is that a customer may have multiple addresses without overwriting unrelated entries.

Incorrect Answers

B:

“Follow the documented posting and corrective-document patterns instead of editing immutable history” concerns the alternative task “follow the documented posting and corrective-document patterns instead of editing immutable history”, but the stated failure is that a table stores multiple unrelated customer shipping addresses in repeated address1/address2 fields. The required measure is to represent repeating related records with an appropriate child table and explicit relationship.

C:

The proposed “Use an appropriate enum/state model with controlled business transitions” tests a different control: use an appropriate enum/state model with controlled business transitions. The reported condition is that a table stores multiple unrelated customer shipping addresses in repeated address1/address2 fields; the more direct action is to represent repeating related records with an appropriate child table and explicit relationship.

D:

“Use stable vendor identifiers and defined match/merge rules for master data” supports the separate task “use stable vendor identifiers and defined match/merge rules for master data”, not the reported problem: a table stores multiple unrelated customer shipping addresses in repeated address1/address2 fields. This case instead calls for “represent repeating related records with an appropriate child table and explicit relationship”.

Question 132

At fictional Trinity Trading, the Business Central development team is supporting cross-border purchasing and reviewing AL business logic and user experience during a code quality review (MB820-4.2-139). The observed development issue is that a table stores multiple unrelated customer shipping addresses in repeated address1/address2 fields. Which recurring engineering check would best prevent this issue from returning?

  1. Inspect posting transitions for premature financial mutations.
  2. Test API-created and page-created records against the same rules.
  3. Review schema for repeated fields before release.
  4. Validate state transition tests after adding status values.

Explanation

Correct Answer

C:

The ongoing check is to review schema for repeated fields before release. This helps detect recurrence when a table stores multiple unrelated customer shipping addresses in repeated address1/address2 fields. The associated correction is to represent repeating related records with an appropriate child table and explicit relationship; a confirming result is that a customer may have multiple addresses without overwriting unrelated entries.

Incorrect Answers

A:

“Inspect posting transitions for premature financial mutations” concerns the alternative task “keep unposted documents and posted accounting entries separate in the lifecycle”, but the stated failure is that a table stores multiple unrelated customer shipping addresses in repeated address1/address2 fields. The required measure is to review schema for repeated fields before release.

B:

The proposed “Test API-created and page-created records against the same rules” tests a different control: use standard field validation and business rule entry points before database writes. The reported condition is that a table stores multiple unrelated customer shipping addresses in repeated address1/address2 fields; the more direct action is to review schema for repeated fields before release.

D:

“Validate state transition tests after adding status values” concerns the separate step “use an appropriate enum/state model with controlled business transitions”. The reported issue is that a table stores multiple unrelated customer shipping addresses in repeated address1/address2 fields, so the direct response is to review schema for repeated fields before release.

Question 133

At fictional Upland Facilities, the Business Central development team is supporting service dispatch and support and reviewing automated testing and diagnostics during an extension upgrade rehearsal (MB820-5.1-167). The observed development issue is that a developer validates a posting extension by clicking through one happy-path page without testing failures. Which Business Central or AL development principle best explains the right response?

  1. Regression testing needs executable assertions, not only manual exploration.
  2. Test isolation must include the underlying business database.
  3. Testing infrastructure is valuable only when it gates delivery.
  4. Reusable test fixtures reduce validation drift.

Explanation

Correct Answer

A:

The governing principle is that regression testing needs executable assertions, not only manual exploration. The engineering response is to create AL test codeunits with [Test] procedures covering success and rejection branches. Verification should show that the automated suite catches both allowed and blocked transaction outcomes.

Incorrect Answers

B:

“Test isolation must include the underlying business database” supports the separate task “run Business Central tests using an isolated test environment and controlled fixtures”, not the reported problem: a developer validates a posting extension by clicking through one happy-path page without testing failures. This case instead calls for “create AL test codeunits with [Test] procedures covering success and rejection branches”.

C:

“Testing infrastructure is valuable only when it gates delivery” concerns the separate step “configure and execute supported Business Central tests in the Test Toolkit or automated test runner”. The reported issue is that a developer validates a posting extension by clicking through one happy-path page without testing failures, so the direct response is to create AL test codeunits with [Test] procedures covering success and rejection branches.

D:

“Reusable test fixtures reduce validation drift” concerns the alternative task “use shared test helpers and a clear arrange-act-assert structure”, but the stated failure is that a developer validates a posting extension by clicking through one happy-path page without testing failures. The required measure is to create AL test codeunits with [Test] procedures covering success and rejection branches.

Question 134

At fictional Upland Facilities, the Business Central development team is supporting service dispatch and support and reviewing automated testing and diagnostics during an extension upgrade rehearsal (MB820-5.1-167). The observed development issue is that a developer validates a posting extension by clicking through one happy-path page without testing failures. Which observed result would most clearly show the intended correction works?

  1. The automated suite catches both allowed and blocked transaction outcomes.
  2. A changed report that omits lines or totals fails the test.
  3. Historical records remain correct across the version change.
  4. Repeated test runs validate behavior without real financial side effects.

Explanation

Correct Answer

A:

This is the outcome that directly verifies the intended correction: the automated suite catches both allowed and blocked transaction outcomes. The related solution is to create AL test codeunits with [Test] procedures covering success and rejection branches; it is based on the principle that regression testing needs executable assertions, not only manual exploration.

Incorrect Answers

B:

“A changed report that omits lines or totals fails the test” concerns the separate step “assert expected dataset values or generated output with representative fixtures”. The reported issue is that a developer validates a posting extension by clicking through one happy-path page without testing failures, so the direct response is to the automated suite catches both allowed and blocked transaction outcomes.

C:

“Historical records remain correct across the version change” concerns the alternative task “seed an older app version with representative data then test upgrade preservation”, but the stated failure is that a developer validates a posting extension by clicking through one happy-path page without testing failures. The required measure is to the automated suite catches both allowed and blocked transaction outcomes.

D:

The proposed “Repeated test runs validate behavior without real financial side effects” tests a different control: use controlled HTTP mocks or supported test isolation and fixture responses. The reported condition is that a developer validates a posting extension by clicking through one happy-path page without testing failures; the more direct action is to the automated suite catches both allowed and blocked transaction outcomes.

Question 135

At fictional Upland Facilities, the Business Central development team is supporting service dispatch and support and reviewing automated testing and diagnostics during an extension upgrade rehearsal (MB820-5.1-167). The observed development issue is that a developer validates a posting extension by clicking through one happy-path page without testing failures. Which recurring engineering check would best prevent this issue from returning?

  1. Require tests for every new posting rule.
  2. Run report regression checks after dataset changes.
  3. Randomize test execution order periodically.
  4. Include state assertions after critical page actions.

Explanation

Correct Answer

A:

The ongoing check is to require tests for every new posting rule. This helps detect recurrence when a developer validates a posting extension by clicking through one happy-path page without testing failures. The associated correction is to create AL test codeunits with [Test] procedures covering success and rejection branches; a confirming result is that the automated suite catches both allowed and blocked transaction outcomes.

Incorrect Answers

B:

“Run report regression checks after dataset changes” concerns the alternative task “assert expected dataset values or generated output with representative fixtures”, but the stated failure is that a developer validates a posting extension by clicking through one happy-path page without testing failures. The required measure is to require tests for every new posting rule.

C:

The proposed “Randomize test execution order periodically” tests a different control: create independent fixtures for each test and use appropriate cleanup or transaction isolation. The reported condition is that a developer validates a posting extension by clicking through one happy-path page without testing failures; the more direct action is to require tests for every new posting rule.

D:

“Include state assertions after critical page actions” supports the separate task “use the appropriate TestPage interaction and assert resulting business state”, not the reported problem: a developer validates a posting extension by clicking through one happy-path page without testing failures. This case instead calls for “Require tests for every new posting rule”.

Question 136

At fictional Upland Facilities, the Business Central development team is supporting service dispatch and support and reviewing automated testing and diagnostics during an extension upgrade rehearsal (MB820-5.1-167). The observed development issue is that a developer validates a posting extension by clicking through one happy-path page without testing failures. Which AL development or design response most directly addresses this issue?

  1. Create AL test codeunits with [Test] procedures covering success and rejection branches.
  2. Create independent fixtures for each test and use appropriate cleanup or transaction isolation.
  3. Configure and execute supported Business Central tests in the Test Toolkit or automated test runner.
  4. Use shared test helpers and a clear arrange-act-assert structure.

Explanation

Correct Answer

A:

The most direct corrective response is to create AL test codeunits with [Test] procedures covering success and rejection branches. This addresses the specific failure where a developer validates a posting extension by clicking through one happy-path page without testing failures. Acceptance evidence is that the automated suite catches both allowed and blocked transaction outcomes.

Incorrect Answers

B:

The proposed “Create independent fixtures for each test and use appropriate cleanup or transaction isolation” tests a different control: create independent fixtures for each test and use appropriate cleanup or transaction isolation. The reported condition is that a developer validates a posting extension by clicking through one happy-path page without testing failures; the more direct action is to create AL test codeunits with [Test] procedures covering success and rejection branches.

C:

“Configure and execute supported Business Central tests in the Test Toolkit or automated test runner” supports the separate task “configure and execute supported Business Central tests in the Test Toolkit or automated test runner”, not the reported problem: a developer validates a posting extension by clicking through one happy-path page without testing failures. This case instead calls for “create AL test codeunits with [Test] procedures covering success and rejection branches”.

D:

“Use shared test helpers and a clear arrange-act-assert structure” concerns the separate step “use shared test helpers and a clear arrange-act-assert structure”. The reported issue is that a developer validates a posting extension by clicking through one happy-path page without testing failures, so the direct response is to create AL test codeunits with [Test] procedures covering success and rejection branches.

Question 137

At fictional Cedar Retail Group, the Business Central development team is supporting store procurement and finance and reviewing solution architecture design during a source-control pull request (MB820-1.1-009). The observed development issue is that a manufacturing tenant has developed one large custom application containing functions with incompatible release cycles. Which Business Central or AL development principle best explains the right response?

  1. The System Application and Base Application serve different architectural responsibilities.
  2. Deployment models differ in administrative and runtime capabilities.
  3. Modularity and dependency contracts reduce coupling between Business Central solutions.
  4. SaaS servicing does not transfer responsibility for third-party app quality.

Explanation

Correct Answer

C:

The governing principle is that modularity and dependency contracts reduce coupling between Business Central solutions. The engineering response is to separate independently maintained capabilities into versioned extension apps with explicit dependencies. Verification should show that a small module can be updated without rebuilding unrelated modules and dependency versions stay valid.

Incorrect Answers

A:

The proposed “The System Application and Base Application serve different architectural responsibilities” 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 manufacturing tenant has developed one large custom application containing functions with incompatible release cycles; the more direct action is to separate independently maintained capabilities into versioned extension apps with explicit dependencies.

B:

“Deployment models differ in administrative and runtime capabilities” supports the separate task “assess deployment-specific restrictions and select cloud-compatible APIs when SaaS must be supported”, not the reported problem: a manufacturing tenant has developed one large custom application containing functions with incompatible release cycles. This case instead calls for “separate independently maintained capabilities into versioned extension apps with explicit dependencies”.

D:

“SaaS servicing does not transfer responsibility for third-party app quality” concerns the alternative task “assign extension code ownership and compatibility testing to the publisher while Microsoft maintains the online platform”, but the stated failure is that a manufacturing tenant has developed one large custom application containing functions with incompatible release cycles. The required measure is to separate independently maintained capabilities into versioned extension apps with explicit dependencies.

Question 138

At fictional Cedar Retail Group, the Business Central development team is supporting store procurement and finance and reviewing solution architecture design during a source-control pull request (MB820-1.1-009). The observed development issue is that a manufacturing tenant has developed one large custom application containing functions with incompatible release cycles. Which recurring engineering check would best prevent this issue from returning?

  1. Check app dependencies during every automated build and upgrade.
  2. Regression-test critical integrations before major environment upgrades.
  3. Test extension deployment in each supported environment mode.
  4. Rehearse extension compatibility against preview or sandbox release environments.

Explanation

Correct Answer

A:

The ongoing check is to check app dependencies during every automated build and upgrade. This helps detect recurrence when a manufacturing tenant has developed one large custom application containing functions with incompatible release cycles. The associated correction is to separate independently maintained capabilities into versioned extension apps with explicit dependencies; a confirming result is that a small module can be updated without rebuilding unrelated modules and dependency versions stay valid.

Incorrect Answers

B:

“Regression-test critical integrations before major environment upgrades” concerns the separate step “track the platform release cycle and qualify extension versions against available compatibility signals”. The reported issue is that a manufacturing tenant has developed one large custom application containing functions with incompatible release cycles, so the direct response is to check app dependencies during every automated build and upgrade.

C:

“Test extension deployment in each supported environment mode” concerns the alternative task “assess deployment-specific restrictions and select cloud-compatible APIs when SaaS must be supported”, but the stated failure is that a manufacturing tenant has developed one large custom application containing functions with incompatible release cycles. The required measure is to check app dependencies during every automated build and upgrade.

D:

The proposed “Rehearse extension compatibility against preview or sandbox release environments” tests a different control: assign extension code ownership and compatibility testing to the publisher while Microsoft maintains the online platform. The reported condition is that a manufacturing tenant has developed one large custom application containing functions with incompatible release cycles; the more direct action is to check app dependencies during every automated build and upgrade.

Question 139

At fictional Cedar Retail Group, the Business Central development team is supporting store procurement and finance and reviewing solution architecture design during a source-control pull request (MB820-1.1-009). The observed development issue is that a manufacturing tenant has developed one large custom application containing functions with incompatible release cycles. Which observed result would most clearly show the intended correction works?

  1. A sandbox update detects API incompatibility before the live environment is updated.
  2. The feature runs without file-system or server-administration privileges in the online target.
  3. An isolated-tenant test shows no unintended cross-tenant records and approved integration transfers only permitted data.
  4. A small module can be updated without rebuilding unrelated modules and dependency versions stay valid.

Explanation

Correct Answer

D:

This is the outcome that directly verifies the intended correction: a small module can be updated without rebuilding unrelated modules and dependency versions stay valid. The related solution is to separate independently maintained capabilities into versioned extension apps with explicit dependencies; it is based on the principle that modularity and dependency contracts reduce coupling between Business Central solutions.

Incorrect Answers

A:

“A sandbox update detects API incompatibility before the live environment is updated” concerns the separate step “track the platform release cycle and qualify extension versions against available compatibility signals”. The reported issue is that a manufacturing tenant has developed one large custom application containing functions with incompatible release cycles, so the direct response is to a small module can be updated without rebuilding unrelated modules and dependency versions stay valid.

B:

“The feature runs without file-system or server-administration privileges in the online target” concerns the alternative task “assess deployment-specific restrictions and select cloud-compatible APIs when SaaS must be supported”, but the stated failure is that a manufacturing tenant has developed one large custom application containing functions with incompatible release cycles. The required measure is to a small module can be updated without rebuilding unrelated modules and dependency versions stay valid.

C:

The proposed “An isolated-tenant test shows no unintended cross-tenant records and approved integration transfers only permitted data” tests a different control: design explicit authorized integration rather than assuming Business Central tenant databases share company data. The reported condition is that a manufacturing tenant has developed one large custom application containing functions with incompatible release cycles; the more direct action is to a small module can be updated without rebuilding unrelated modules and dependency versions stay valid.

Question 140

At fictional Cedar Retail Group, the Business Central development team is supporting store procurement and finance and reviewing solution architecture design during a source-control pull request (MB820-1.1-009). The observed development issue is that a manufacturing tenant has developed one large custom application containing functions with incompatible release cycles. Which AL development or design response most directly addresses this issue?

  1. Assess deployment-specific restrictions and select cloud-compatible APIs when SaaS must be supported.
  2. Separate independently maintained capabilities into versioned extension apps with explicit dependencies.
  3. Design explicit authorized integration rather than assuming Business Central tenant databases share company data.
  4. Replace the server-specific .NET dependency with supported AL or external service integration appropriate to cloud execution.

Explanation

Correct Answer

B:

The most direct corrective response is to separate independently maintained capabilities into versioned extension apps with explicit dependencies. This addresses the specific failure where a manufacturing tenant has developed one large custom application containing functions with incompatible release cycles. Acceptance evidence is that a small module can be updated without rebuilding unrelated modules and dependency versions stay valid.

Incorrect Answers

A:

“Assess deployment-specific restrictions and select cloud-compatible APIs when SaaS must be supported” concerns the alternative task “assess deployment-specific restrictions and select cloud-compatible APIs when SaaS must be supported”, but the stated failure is that a manufacturing tenant has developed one large custom application containing functions with incompatible release cycles. The required measure is to separate independently maintained capabilities into versioned extension apps with explicit dependencies.

C:

“Design explicit authorized integration rather than assuming Business Central tenant databases share company data” supports the separate task “design explicit authorized integration rather than assuming Business Central tenant databases share company data”, not the reported problem: a manufacturing tenant has developed one large custom application containing functions with incompatible release cycles. This case instead calls for “separate independently maintained capabilities into versioned extension apps with explicit dependencies”.

D:

“Replace the server-specific .NET dependency with supported AL or external service integration appropriate to cloud execution” concerns the separate step “replace the server-specific .NET dependency with supported AL or external service integration appropriate to cloud execution”. The reported issue is that a manufacturing tenant has developed one large custom application containing functions with incompatible release cycles, so the direct response is to separate independently maintained capabilities into versioned extension apps with explicit dependencies.