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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 MB-820 Practice Test 44

Question 430

At fictional Cedar Retail Group, the Business Central development team is supporting store procurement and finance and reviewing external-service integration during a troubleshooting exercise (MB820-6.2-196). The observed development issue is that a read-heavy API integration slows down transactional writes because it competes with primary operations. Which AL development or design response most directly addresses this issue?

  1. Evaluate supported read scale-out patterns for appropriate read workloads without compromising consistency needs.
  2. Publish a compatible new API contract or supported API page design rather than assuming API page extension is available.
  3. Design appropriate API page parts or supported related entity navigation with stable keys.
  4. Expose only the minimal approved fields and apply entitlement and permission rules.

Explanation

Correct Answer

A:

The most direct corrective response is to evaluate supported read scale-out patterns for appropriate read workloads without compromising consistency needs. This addresses the specific failure where a read-heavy API integration slows down transactional writes because it competes with primary operations. Acceptance evidence is that read traffic is routed as intended while write operations remain correct.

Incorrect Answers

B:

“Publish a compatible new API contract or supported API page design rather than assuming API page extension is available” 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 a read-heavy API integration slows down transactional writes because it competes with primary operations, so the direct response is to evaluate supported read scale-out patterns for appropriate read workloads without compromising consistency needs.

C:

“Design appropriate API page parts or supported related entity navigation with stable keys” concerns the alternative task “design appropriate API page parts or supported related entity navigation with stable keys”, but the stated failure is that a read-heavy API integration slows down transactional writes because it competes with primary operations. The required measure is to evaluate supported read scale-out patterns for appropriate read workloads without compromising consistency needs.

D:

The proposed “Expose only the minimal approved fields and apply entitlement and permission rules” tests a different control: expose only the minimal approved fields and apply entitlement and permission rules. The reported condition is that a read-heavy API integration slows down transactional writes because it competes with primary operations; the more direct action is to evaluate supported read scale-out patterns for appropriate read workloads without compromising consistency needs.

Question 431

At fictional Cedar Retail Group, the Business Central development team is supporting store procurement and finance and reviewing external-service integration during a troubleshooting exercise (MB820-6.2-196). The observed development issue is that a read-heavy API integration slows down transactional writes because it competes with primary operations. Which observed result would most clearly show the intended correction works?

  1. The consumer sees a documented field in the supported API version.
  2. Read traffic is routed as intended while write operations remain correct.
  3. The caller gets the intended action outcome without bypassing document posting rules.
  4. Unauthorized requests are denied even when callers know the endpoint URL.

Explanation

Correct Answer

B:

This is the outcome that directly verifies the intended correction: read traffic is routed as intended while write operations remain correct. The related solution is to evaluate supported read scale-out patterns for appropriate read workloads without compromising consistency needs; it is based on the principle that read scale-out is an optimization for suitable reads, not a license for stale transactional decisions.

Incorrect Answers

A:

“The consumer sees a documented field in the supported API version” 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 a read-heavy API integration slows down transactional writes because it competes with primary operations, so the direct response is to read traffic is routed as intended while write operations remain correct.

C:

The proposed “The caller gets the intended action outcome without bypassing document posting rules” tests a different control: implement or expose an appropriate supported bound/unbound action that invokes validated posting logic. The reported condition is that a read-heavy API integration slows down transactional writes because it competes with primary operations; the more direct action is to read traffic is routed as intended while write operations remain correct.

D:

“Unauthorized requests are denied even when callers know the endpoint URL” supports the separate task “expose only approved actions and enforce permissions and validation at the service boundary”, not the reported problem: a read-heavy API integration slows down transactional writes because it competes with primary operations. This case instead calls for “Read traffic is routed as intended while write operations remain correct”.

Question 432

At fictional Cedar Retail Group, the Business Central development team is supporting store procurement and finance and reviewing external-service integration during a troubleshooting exercise (MB820-6.2-196). The observed development issue is that a read-heavy API integration slows down transactional writes because it competes with primary operations. Which recurring engineering check would best prevent this issue from returning?

  1. Test action permissions and posting effects.
  2. Test data freshness and consistency assumptions before enabling read scale-out.
  3. Test duplicate submission and late response scenarios.
  4. Diff published schemas before deployment.

Explanation

Correct Answer

B:

The ongoing check is to test data freshness and consistency assumptions before enabling read scale-out. This helps detect recurrence when a read-heavy API integration slows down transactional writes because it competes with primary operations. The associated correction is to evaluate supported read scale-out patterns for appropriate read workloads without compromising consistency needs; a confirming result is that read traffic is routed as intended while write operations remain correct.

Incorrect Answers

A:

“Test action permissions and posting effects” concerns the alternative task “implement or expose an appropriate supported bound/unbound action that invokes validated posting logic”, but the stated failure is that a read-heavy API integration slows down transactional writes because it competes with primary operations. The required measure is to test data freshness and consistency assumptions before enabling read scale-out.

C:

“Test duplicate submission and late response scenarios” supports the separate task “define idempotency and stable external reference handling in the API-backed business process”, not the reported problem: a read-heavy API integration slows down transactional writes because it competes with primary operations. This case instead calls for “Test data freshness and consistency assumptions before enabling read scale-out”.

D:

“Diff published schemas before deployment” concerns the separate step “preserve compatible contracts or introduce a deliberate versioned API and migration path”. The reported issue is that a read-heavy API integration slows down transactional writes because it competes with primary operations, so the direct response is to test data freshness and consistency assumptions before enabling read scale-out.

Question 433

At fictional Evergreen Print, the Business Central development team is supporting print production scheduling and reviewing external-service integration during a sandbox design review (MB820-6.1-182). The observed development issue is that a remote API returns HTTP 503 but the extension treats any completed HttpClient.Send call as business success. Which Business Central or AL development principle best explains the right response?

  1. Remote request construction must preserve input-data boundaries.
  2. HTTP integrations require aligned payload and content-type contracts.
  3. External service latency must not create unbounded transactional dependency.
  4. Transport completion does not guarantee a successful HTTP response.

Explanation

Correct Answer

D:

The governing principle is that transport completion does not guarantee a successful HTTP response. The engineering response is to check both transport execution and HTTP response status before accepting returned data. Verification should show that simulated 503 yields a visible failure or safe fallback without a fake quote.

Incorrect Answers

A:

The proposed “Remote request construction must preserve input-data boundaries” tests a different control: validate input and use appropriate URI encoding for outbound requests. The reported condition is that a remote API returns HTTP 503 but the extension treats any completed HttpClient.Send call as business success; the more direct action is to check both transport execution and HTTP response status before accepting returned data.

B:

“HTTP integrations require aligned payload and content-type contracts” supports the separate task “build a JsonObject/JsonToken payload and set the appropriate content headers”, not the reported problem: a remote API returns HTTP 503 but the extension treats any completed HttpClient.Send call as business success. This case instead calls for “check both transport execution and HTTP response status before accepting returned data”.

C:

“External service latency must not create unbounded transactional dependency” concerns the separate step “set an appropriate request timeout and implement a bounded failure path or asynchronous design where needed”. The reported issue is that a remote API returns HTTP 503 but the extension treats any completed HttpClient.Send call as business success, so the direct response is to check both transport execution and HTTP response status before accepting returned data.

Question 434

At fictional Evergreen Print, the Business Central development team is supporting print production scheduling and reviewing external-service integration during a sandbox design review (MB820-6.1-182). The observed development issue is that a remote API returns HTTP 503 but the extension treats any completed HttpClient.Send call as business success. Which observed result would most clearly show the intended correction works?

  1. Simulated 503 yields a visible failure or safe fallback without a fake quote.
  2. The integration authenticates while the package and logs contain no secret.
  3. Special characters do not change the endpoint or insert unexpected parameters.
  4. All shipment entries are parsed without truncation or runtime conversion errors.

Explanation

Correct Answer

A:

This is the outcome that directly verifies the intended correction: simulated 503 yields a visible failure or safe fallback without a fake quote. The related solution is to check both transport execution and HTTP response status before accepting returned data; it is based on the principle that transport completion does not guarantee a successful HTTP response.

Incorrect Answers

B:

“The integration authenticates while the package and logs contain no secret” concerns the separate step “use supported secret storage or secure authorization flow rather than embedding the token in source”. The reported issue is that a remote API returns HTTP 503 but the extension treats any completed HttpClient.Send call as business success, so the direct response is to simulated 503 yields a visible failure or safe fallback without a fake quote.

C:

“Special characters do not change the endpoint or insert unexpected parameters” concerns the alternative task “validate input and use appropriate URI encoding for outbound requests”, but the stated failure is that a remote API returns HTTP 503 but the extension treats any completed HttpClient.Send call as business success. The required measure is to simulated 503 yields a visible failure or safe fallback without a fake quote.

D:

The proposed “All shipment entries are parsed without truncation or runtime conversion errors” tests a different control: inspect JSON token types and iterate JsonArray elements using supported AL JSON APIs. The reported condition is that a remote API returns HTTP 503 but the extension treats any completed HttpClient.Send call as business success; the more direct action is to simulated 503 yields a visible failure or safe fallback without a fake quote.

Question 435

At fictional Evergreen Print, the Business Central development team is supporting print production scheduling and reviewing external-service integration during a sandbox design review (MB820-6.1-182). The observed development issue is that a remote API returns HTTP 503 but the extension treats any completed HttpClient.Send call as business success. Which AL development or design response most directly addresses this issue?

  1. Configure the required request headers and validated HTTP method before calling.
  2. Check both transport execution and HTTP response status before accepting returned data.
  3. Use AL HttpClient/HttpRequestMessage to invoke the authorized REST endpoint and parse its response.
  4. Set an appropriate request timeout and implement a bounded failure path or asynchronous design where needed.

Explanation

Correct Answer

B:

The most direct corrective response is to check both transport execution and HTTP response status before accepting returned data. This addresses the specific failure where a remote API returns HTTP 503 but the extension treats any completed HttpClient.Send call as business success. Acceptance evidence is that simulated 503 yields a visible failure or safe fallback without a fake quote.

Incorrect Answers

A:

“Configure the required request headers and validated HTTP method before calling” concerns the separate step “configure the required request headers and validated HTTP method before calling”. The reported issue is that a remote API returns HTTP 503 but the extension treats any completed HttpClient.Send call as business success, so the direct response is to check both transport execution and HTTP response status before accepting returned data.

C:

The proposed “Use AL HttpClient/HttpRequestMessage to invoke the authorized REST endpoint and parse its response” tests a different control: use AL HttpClient/HttpRequestMessage to invoke the authorized REST endpoint and parse its response. The reported condition is that a remote API returns HTTP 503 but the extension treats any completed HttpClient.Send call as business success; the more direct action is to check both transport execution and HTTP response status before accepting returned data.

D:

“Set an appropriate request timeout and implement a bounded failure path or asynchronous design where needed” supports the separate task “set an appropriate request timeout and implement a bounded failure path or asynchronous design where needed”, not the reported problem: a remote API returns HTTP 503 but the extension treats any completed HttpClient.Send call as business success. This case instead calls for “check both transport execution and HTTP response status before accepting returned data”.

Question 436

At fictional Evergreen Print, the Business Central development team is supporting print production scheduling and reviewing external-service integration during a sandbox design review (MB820-6.1-182). The observed development issue is that a remote API returns HTTP 503 but the extension treats any completed HttpClient.Send call as business success. Which recurring engineering check would best prevent this issue from returning?

  1. Verify headers with a controlled mock endpoint.
  2. Scan extension packages and telemetry for credential material.
  3. Test timeouts and authorization failures for external calls.
  4. Monitor non-2xx response handling and retry limits.

Explanation

Correct Answer

D:

The ongoing check is to monitor non-2xx response handling and retry limits. This helps detect recurrence when a remote API returns HTTP 503 but the extension treats any completed HttpClient.Send call as business success. The associated correction is to check both transport execution and HTTP response status before accepting returned data; a confirming result is that simulated 503 yields a visible failure or safe fallback without a fake quote.

Incorrect Answers

A:

“Verify headers with a controlled mock endpoint” concerns the alternative task “configure the required request headers and validated HTTP method before calling”, but the stated failure is that a remote API returns HTTP 503 but the extension treats any completed HttpClient.Send call as business success. The required measure is to monitor non-2xx response handling and retry limits.

B:

The proposed “Scan extension packages and telemetry for credential material” tests a different control: use supported secret storage or secure authorization flow rather than embedding the token in source. The reported condition is that a remote API returns HTTP 503 but the extension treats any completed HttpClient.Send call as business success; the more direct action is to monitor non-2xx response handling and retry limits.

C:

“Test timeouts and authorization failures for external calls” supports the separate task “use AL HttpClient/HttpRequestMessage to invoke the authorized REST endpoint and parse its response”, not the reported problem: a remote API returns HTTP 503 but the extension treats any completed HttpClient.Send call as business success. This case instead calls for “Monitor non-2xx response handling and retry limits”.

Question 437

At fictional Dovetail Services, the Business Central development team is supporting customer service agreements and reviewing extension environment and deployment preparation during an extension upgrade rehearsal (MB820-2.1-032). The observed development issue is that a team sends developers one hard-coded launch.json file with other tenants' environment IDs. Which AL development or design response most directly addresses this issue?

  1. Download current symbols and declare the required app dependency with compatible versions.
  2. Configure an appropriate multi-root workspace and preserve distinct app manifests and dependencies.
  3. Use separate, minimally scoped development configurations rather than shared cross-customer endpoints.
  4. Install the current AL Language extension in Visual Studio Code and use its compiler and editor services.

Explanation

Correct Answer

C:

The most direct corrective response is to use separate, minimally scoped development configurations rather than shared cross-customer endpoints. This addresses the specific failure where a team sends developers one hard-coded launch.json file with other tenants' environment IDs. Acceptance evidence is that each developer connects only to the tenant and sandbox they are authorized to use.

Incorrect Answers

A:

The proposed “Download current symbols and declare the required app dependency with compatible versions” tests a different control: download current symbols and declare the required app dependency with compatible versions. The reported condition is that a team sends developers one hard-coded launch.json file with other tenants' environment IDs; the more direct action is to use separate, minimally scoped development configurations rather than shared cross-customer endpoints.

B:

“Configure an appropriate multi-root workspace and preserve distinct app manifests and dependencies” supports the separate task “configure an appropriate multi-root workspace and preserve distinct app manifests and dependencies”, not the reported problem: a team sends developers one hard-coded launch.json file with other tenants' environment IDs. This case instead calls for “use separate, minimally scoped development configurations rather than shared cross-customer endpoints”.

D:

“Install the current AL Language extension in Visual Studio Code and use its compiler and editor services” concerns the alternative task “install the current AL Language extension in Visual Studio Code and use its compiler and editor services”, but the stated failure is that a team sends developers one hard-coded launch.json file with other tenants' environment IDs. The required measure is to use separate, minimally scoped development configurations rather than shared cross-customer endpoints.

Question 438

At fictional Dovetail Services, the Business Central development team is supporting customer service agreements and reviewing extension environment and deployment preparation during an extension upgrade rehearsal (MB820-2.1-032). The observed development issue is that a team sends developers one hard-coded launch.json file with other tenants' environment IDs. Which Business Central or AL development principle best explains the right response?

  1. Environment targeting is an authorization and isolation concern.
  2. Manifest metadata and debugger settings serve separate functions.
  3. Supported developer tooling shortens the feedback loop for AL errors.
  4. Compilation depends on both symbol availability and declared app relationships.

Explanation

Correct Answer

A:

The governing principle is that environment targeting is an authorization and isolation concern. The engineering response is to use separate, minimally scoped development configurations rather than shared cross-customer endpoints. Verification should show that each developer connects only to the tenant and sandbox they are authorized to use.

Incorrect Answers

B:

“Manifest metadata and debugger settings serve separate functions” concerns the separate step “separate app package identity/version metadata in app.json from run and attach configuration in launch.json”. The reported issue is that a team sends developers one hard-coded launch.json file with other tenants' environment IDs, so the direct response is to use separate, minimally scoped development configurations rather than shared cross-customer endpoints.

C:

“Supported developer tooling shortens the feedback loop for AL errors” concerns the alternative task “install the current AL Language extension in Visual Studio Code and use its compiler and editor services”, but the stated failure is that a team sends developers one hard-coded launch.json file with other tenants' environment IDs. The required measure is to use separate, minimally scoped development configurations rather than shared cross-customer endpoints.

D:

The proposed “Compilation depends on both symbol availability and declared app relationships” tests a different control: download current symbols and declare the required app dependency with compatible versions. The reported condition is that a team sends developers one hard-coded launch.json file with other tenants' environment IDs; the more direct action is to use separate, minimally scoped development configurations rather than shared cross-customer endpoints.

Question 439

At fictional Dovetail Services, the Business Central development team is supporting customer service agreements and reviewing extension environment and deployment preparation during an extension upgrade rehearsal (MB820-2.1-032). The observed development issue is that a team sends developers one hard-coded launch.json file with other tenants' environment IDs. Which observed result would most clearly show the intended correction works?

  1. Package versioning and debug connection behave independently under correct files.
  2. Object syntax diagnostics and AL-specific completion appear in the workspace.
  3. Each developer connects only to the tenant and sandbox they are authorized to use.
  4. Experimental deployments do not modify live company data or affect productive users.

Explanation

Correct Answer

C:

This is the outcome that directly verifies the intended correction: each developer connects only to the tenant and sandbox they are authorized to use. The related solution is to use separate, minimally scoped development configurations rather than shared cross-customer endpoints; it is based on the principle that environment targeting is an authorization and isolation concern.

Incorrect Answers

A:

“Package versioning and debug connection behave independently under correct files” concerns the separate step “separate app package identity/version metadata in app.json from run and attach configuration in launch.json”. The reported issue is that a team sends developers one hard-coded launch.json file with other tenants' environment IDs, so the direct response is to each developer connects only to the tenant and sandbox they are authorized to use.

B:

“Object syntax diagnostics and AL-specific completion appear in the workspace” concerns the alternative task “install the current AL Language extension in Visual Studio Code and use its compiler and editor services”, but the stated failure is that a team sends developers one hard-coded launch.json file with other tenants' environment IDs. The required measure is to each developer connects only to the tenant and sandbox they are authorized to use.

D:

“Experimental deployments do not modify live company data or affect productive users” supports the separate task “create and target a dedicated sandbox environment with nonproduction data and restricted permissions”, not the reported problem: a team sends developers one hard-coded launch.json file with other tenants' environment IDs. This case instead calls for “Each developer connects only to the tenant and sandbox they are authorized to use”.

Question 440

At fictional Dovetail Services, the Business Central development team is supporting customer service agreements and reviewing extension environment and deployment preparation during an extension upgrade rehearsal (MB820-2.1-032). The observed development issue is that a team sends developers one hard-coded launch.json file with other tenants' environment IDs. Which recurring engineering check would best prevent this issue from returning?

  1. Review environment connection settings before shared-workspace adoption.
  2. Lint project configuration for misplaced connection properties.
  3. Run clean symbol restoration on a fresh CI agent.
  4. Perform clean builds when target platform versions change.

Explanation

Correct Answer

A:

The ongoing check is to review environment connection settings before shared-workspace adoption. This helps detect recurrence when a team sends developers one hard-coded launch.json file with other tenants' environment IDs. The associated correction is to use separate, minimally scoped development configurations rather than shared cross-customer endpoints; a confirming result is that each developer connects only to the tenant and sandbox they are authorized to use.

Incorrect Answers

B:

The proposed “Lint project configuration for misplaced connection properties” tests a different control: separate app package identity/version metadata in app.json from run and attach configuration in launch.json. The reported condition is that a team sends developers one hard-coded launch.json file with other tenants' environment IDs; the more direct action is to review environment connection settings before shared-workspace adoption.

C:

“Run clean symbol restoration on a fresh CI agent” supports the separate task “download current symbols and declare the required app dependency with compatible versions”, not the reported problem: a team sends developers one hard-coded launch.json file with other tenants' environment IDs. This case instead calls for “Review environment connection settings before shared-workspace adoption”.

D:

“Perform clean builds when target platform versions change” concerns the separate step “refresh downloaded symbols and resolve dependency versions against the new application target”. The reported issue is that a team sends developers one hard-coded launch.json file with other tenants' environment IDs, so the direct response is to review environment connection settings before shared-workspace adoption.