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Microsoft MB-820 Premium Bundle

MB-820 Premium File: 131 Questions & Answers

Last Update: Oct 12, 2026

MB-820 PDF Study Guide: 948 Pages

$74.99

MB-820 Bundle gives you unlimited access to "MB-820" files. However, this does not replace the need for a .vce exam simulator. To download your .vce exam simulator click here

Microsoft MB-820 Practice Test 71

Question 700

A support engineer sees frequent exception events but cannot isolate whether they came from the latest extension deployment. A targeted trial still reproduces the original gap after the team attempted this change: Analyze Application Insights traces using KQL filters for environment, app ID, version and time. Which repair directly addresses the remaining defect?

  1. Reproduce with telemetry, identify the expensive operation and optimize that path before retesting
  2. Correct the KQL dimensions and time window so relevant traces are included and unrelated ones excluded
  3. Correct the environment Application Insights connection settings and ingestion access then verify signals
  4. Correct the app manifest telemetry configuration and verify emitted events carry the right app identity

Explanation

Correct Answer

B:

Correct the KQL dimensions and time window so relevant traces are included and unrelated ones excluded. This directly addresses the remaining defect for the requirement—A support engineer sees frequent exception events but cannot isolate whether they came from the latest extension deployment. It restores the mechanism described here: structured telemetry dimensions let investigators narrow events to a deployment and correlate performance or errors.

Incorrect Answers

A:

This correction is for the separate condition: A warehouse application sometimes times out and engineers guess which database operation is expensive. It would not directly restore the intended behavior in this situation: A support engineer sees frequent exception events but cannot isolate whether they came from the latest extension deployment. Here, correct the kql dimensions and time window so relevant traces are included and unrelated ones excluded, because structured telemetry dimensions let investigators narrow events to a deployment and correlate performance or errors.

C:

This correction is for the separate condition: A support team wants error and latency signals from an on-premises Business Central instance into Azure Monitor. It would not directly restore the intended behavior in this situation: A support engineer sees frequent exception events but cannot isolate whether they came from the latest extension deployment. Here, correct the kql dimensions and time window so relevant traces are included and unrelated ones excluded, because structured telemetry dimensions let investigators narrow events to a deployment and correlate performance or errors.

D:

This correction is for the separate condition: A partner needs platform-generated diagnostics for only one extension across tenants, rather than new manual feature telemetry or whole-environment traces. It would not directly restore the intended behavior in this situation: A support engineer sees frequent exception events but cannot isolate whether they came from the latest extension deployment. Here, correct the kql dimensions and time window so relevant traces are included and unrelated ones excluded, because structured telemetry dimensions let investigators narrow events to a deployment and correlate performance or errors.

Question 701

A regional operations team needs to compare latency for two app versions using structured telemetry fields. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Use timing and performance telemetry to locate the measured slow operation before optimizing
  2. Enable and verify environment-level telemetry to the intended Application Insights resource
  3. Configure supported app-level Application Insights telemetry for the extension
  4. Analyze Application Insights traces using KQL filters for environment, app ID, version and time

Explanation

Correct Answer

D:

This targets the concrete requirement—A regional operations team needs to compare latency for two app versions using structured telemetry fields. Structured telemetry dimensions let investigators narrow events to a deployment and correlate performance or errors. The team can establish success when a filtered query returns the known failed operation in the correct release window without mixing other apps.

Incorrect Answers

A:

This choice primarily fits a different requirement: A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck. There, performance work should target observed long-running calls rather than speculative components. In the current situation, A regional operations team needs to compare latency for two app versions using structured telemetry fields. Structured telemetry dimensions let investigators narrow events to a deployment and correlate performance or errors. Acceptance requires a filtered query returns the known failed operation in the correct release window without mixing other apps.

B:

This choice primarily fits a different requirement: An administrator needs diagnostic telemetry from a Business Central online production environment that currently has no Application Insights connection. There, environment-level telemetry sends service operation events to azure application insights for monitoring and troubleshooting. In the current situation, A regional operations team needs to compare latency for two app versions using structured telemetry fields. Structured telemetry dimensions let investigators narrow events to a deployment and correlate performance or errors. Acceptance requires a filtered query returns the known failed operation in the correct release window without mixing other apps.

C:

This choice primarily fits a different requirement: A marketplace app publisher wants platform-emitted runtime errors and app lifecycle telemetry from only its extension across customer tenants, without adding new feature-specific events. There, application-level telemetry can emit extension-related events to an app publisher's resource separately from general environment telemetry. In the current situation, A regional operations team needs to compare latency for two app versions using structured telemetry fields. Structured telemetry dimensions let investigators narrow events to a deployment and correlate performance or errors. Acceptance requires a filtered query returns the known failed operation in the correct release window without mixing other apps.

Question 702

A regional operations team needs to compare latency for two app versions using structured telemetry fields. The developer recommends the following change: Analyze Application Insights traces using KQL filters for environment, app ID, version and time. Which technical explanation most directly justifies it in this case?

  1. Structured telemetry dimensions let investigators narrow events to a deployment and correlate performance or errors
  2. Performance work should target observed long-running calls rather than speculative components
  3. Environment-level telemetry sends service operation events to Azure Application Insights for monitoring and troubleshooting
  4. Application-level telemetry can emit extension-related events to an app publisher's resource separately from general environment telemetry

Explanation

Correct Answer

A:

Structured telemetry dimensions let investigators narrow events to a deployment and correlate performance or errors. It connects the proposed action to the exact failure or requirement—A regional operations team needs to compare latency for two app versions using structured telemetry fields. Confirmation would be a filtered query returns the known failed operation in the correct release window without mixing other apps.

Incorrect Answers

B:

That mechanism explains why the alternative action—use timing and performance telemetry to locate the measured slow operation before optimizing—helps in another case. It does not justify the proposed fix here; structured telemetry dimensions let investigators narrow events to a deployment and correlate performance or errors. The distinguishing requirement is: A regional operations team needs to compare latency for two app versions using structured telemetry fields.

C:

That mechanism explains why the alternative action—enable and verify environment-level telemetry to the intended application insights resource—helps in another case. It does not justify the proposed fix here; structured telemetry dimensions let investigators narrow events to a deployment and correlate performance or errors. The distinguishing requirement is: A regional operations team needs to compare latency for two app versions using structured telemetry fields.

D:

That mechanism explains why the alternative action—configure supported app-level application insights telemetry for the extension—helps in another case. It does not justify the proposed fix here; structured telemetry dimensions let investigators narrow events to a deployment and correlate performance or errors. The distinguishing requirement is: A regional operations team needs to compare latency for two app versions using structured telemetry fields.

Question 703

A regional operations team needs to compare latency for two app versions using structured telemetry fields. The team implemented a change aligned with this plan: Analyze Application Insights traces using KQL filters for environment, app ID, version and time. Which acceptance result specifically verifies that the reported problem is resolved?

  1. Instrumented measurements identify a slow code path and show reduced duration after a controlled fix
  2. A filtered query returns the known failed operation in the correct release window without mixing other apps
  3. Test operations produce expected environment events in the designated resource and environment dimension
  4. Publisher diagnostics show extension-specific operations and failures attributed to the expected app ID

Explanation

Correct Answer

B:

A filtered query returns the known failed operation in the correct release window without mixing other apps. This is stronger than an unrelated health check because the desired design action is analyze application insights traces using kql filters for environment, app id, version and time, and structured telemetry dimensions let investigators narrow events to a deployment and correlate performance or errors. The local requirement is: A regional operations team needs to compare latency for two app versions using structured telemetry fields.

Incorrect Answers

A:

This would verify use timing and performance telemetry to locate the measured slow operation before optimizing, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A regional operations team needs to compare latency for two app versions using structured telemetry fields. The decisive local proof is a filtered query returns the known failed operation in the correct release window without mixing other apps.

C:

This would verify enable and verify environment-level telemetry to the intended application insights resource, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A regional operations team needs to compare latency for two app versions using structured telemetry fields. The decisive local proof is a filtered query returns the known failed operation in the correct release window without mixing other apps.

D:

This would verify configure supported app-level application insights telemetry for the extension, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A regional operations team needs to compare latency for two app versions using structured telemetry fields. The decisive local proof is a filtered query returns the known failed operation in the correct release window without mixing other apps.

Question 704

A regional operations team needs to compare latency for two app versions using structured telemetry fields. A targeted trial still reproduces the original gap after the team attempted this change: Analyze Application Insights traces using KQL filters for environment, app ID, version and time. Which repair directly addresses the remaining defect?

  1. Reproduce with telemetry, identify the expensive operation and optimize that path before retesting
  2. Correct the environment Application Insights connection settings and ingestion access then verify signals
  3. Correct the KQL dimensions and time window so relevant traces are included and unrelated ones excluded
  4. Correct the app manifest telemetry configuration and verify emitted events carry the right app identity

Explanation

Correct Answer

C:

Correct the KQL dimensions and time window so relevant traces are included and unrelated ones excluded. This directly addresses the remaining defect for the requirement—A regional operations team needs to compare latency for two app versions using structured telemetry fields. It restores the mechanism described here: structured telemetry dimensions let investigators narrow events to a deployment and correlate performance or errors.

Incorrect Answers

A:

This correction is for the separate condition: A warehouse application sometimes times out and engineers guess which database operation is expensive. It would not directly restore the intended behavior in this situation: A regional operations team needs to compare latency for two app versions using structured telemetry fields. Here, correct the kql dimensions and time window so relevant traces are included and unrelated ones excluded, because structured telemetry dimensions let investigators narrow events to a deployment and correlate performance or errors.

B:

This correction is for the separate condition: A support team wants error and latency signals from an on-premises Business Central instance into Azure Monitor. It would not directly restore the intended behavior in this situation: A regional operations team needs to compare latency for two app versions using structured telemetry fields. Here, correct the kql dimensions and time window so relevant traces are included and unrelated ones excluded, because structured telemetry dimensions let investigators narrow events to a deployment and correlate performance or errors.

D:

This correction is for the separate condition: A partner needs platform-generated diagnostics for only one extension across tenants, rather than new manual feature telemetry or whole-environment traces. It would not directly restore the intended behavior in this situation: A regional operations team needs to compare latency for two app versions using structured telemetry fields. Here, correct the kql dimensions and time window so relevant traces are included and unrelated ones excluded, because structured telemetry dimensions let investigators narrow events to a deployment and correlate performance or errors.

Question 705

A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Use timing and performance telemetry to locate the measured slow operation before optimizing
  2. Enable and verify environment-level telemetry to the intended Application Insights resource
  3. Configure supported app-level Application Insights telemetry for the extension
  4. Emit purposeful custom feature telemetry such as usage, uptake and error signals

Explanation

Correct Answer

A:

This targets the concrete requirement—A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck. Performance work should target observed long-running calls rather than speculative components. The team can establish success when instrumented measurements identify a slow code path and show reduced duration after a controlled fix.

Incorrect Answers

B:

This choice primarily fits a different requirement: An administrator needs diagnostic telemetry from a Business Central online production environment that currently has no Application Insights connection. There, environment-level telemetry sends service operation events to azure application insights for monitoring and troubleshooting. In the current situation, A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck. Performance work should target observed long-running calls rather than speculative components. Acceptance requires instrumented measurements identify a slow code path and show reduced duration after a controlled fix.

C:

This choice primarily fits a different requirement: A marketplace app publisher wants platform-emitted runtime errors and app lifecycle telemetry from only its extension across customer tenants, without adding new feature-specific events. There, application-level telemetry can emit extension-related events to an app publisher's resource separately from general environment telemetry. In the current situation, A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck. Performance work should target observed long-running calls rather than speculative components. Acceptance requires instrumented measurements identify a slow code path and show reduced duration after a controlled fix.

D:

This choice primarily fits a different requirement: A custom discount capability needs a measurable signal when users discover, activate and successfully use it. There, custom feature telemetry records application-specific behavior that generic infrastructure events may not reveal. In the current situation, A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck. Performance work should target observed long-running calls rather than speculative components. Acceptance requires instrumented measurements identify a slow code path and show reduced duration after a controlled fix.

Question 706

A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck. The developer recommends the following change: Use timing and performance telemetry to locate the measured slow operation before optimizing. Which technical explanation most directly justifies it in this case?

  1. Environment-level telemetry sends service operation events to Azure Application Insights for monitoring and troubleshooting
  2. Performance work should target observed long-running calls rather than speculative components
  3. Application-level telemetry can emit extension-related events to an app publisher's resource separately from general environment telemetry
  4. Custom feature telemetry records application-specific behavior that generic infrastructure events may not reveal

Explanation

Correct Answer

B:

Performance work should target observed long-running calls rather than speculative components. It connects the proposed action to the exact failure or requirement—A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck. Confirmation would be instrumented measurements identify a slow code path and show reduced duration after a controlled fix.

Incorrect Answers

A:

That mechanism explains why the alternative action—enable and verify environment-level telemetry to the intended application insights resource—helps in another case. It does not justify the proposed fix here; performance work should target observed long-running calls rather than speculative components. The distinguishing requirement is: A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck.

C:

That mechanism explains why the alternative action—configure supported app-level application insights telemetry for the extension—helps in another case. It does not justify the proposed fix here; performance work should target observed long-running calls rather than speculative components. The distinguishing requirement is: A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck.

D:

That mechanism explains why the alternative action—emit purposeful custom feature telemetry such as usage, uptake and error signals—helps in another case. It does not justify the proposed fix here; performance work should target observed long-running calls rather than speculative components. The distinguishing requirement is: A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck.

Question 707

A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck. The team implemented a change aligned with this plan: Use timing and performance telemetry to locate the measured slow operation before optimizing. Which acceptance result specifically verifies that the reported problem is resolved?

  1. Test operations produce expected environment events in the designated resource and environment dimension
  2. Publisher diagnostics show extension-specific operations and failures attributed to the expected app ID
  3. Instrumented measurements identify a slow code path and show reduced duration after a controlled fix
  4. Sample business actions produce identifiable feature events with useful non-sensitive dimensions

Explanation

Correct Answer

C:

Instrumented measurements identify a slow code path and show reduced duration after a controlled fix. This is stronger than an unrelated health check because the desired design action is use timing and performance telemetry to locate the measured slow operation before optimizing, and performance work should target observed long-running calls rather than speculative components. The local requirement is: A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck.

Incorrect Answers

A:

This would verify enable and verify environment-level telemetry to the intended application insights resource, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck. The decisive local proof is instrumented measurements identify a slow code path and show reduced duration after a controlled fix.

B:

This would verify configure supported app-level application insights telemetry for the extension, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck. The decisive local proof is instrumented measurements identify a slow code path and show reduced duration after a controlled fix.

D:

This would verify emit purposeful custom feature telemetry such as usage, uptake and error signals, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck. The decisive local proof is instrumented measurements identify a slow code path and show reduced duration after a controlled fix.

Question 708

A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck. A targeted trial still reproduces the original gap after the team attempted this change: Use timing and performance telemetry to locate the measured slow operation before optimizing. Which repair directly addresses the remaining defect?

  1. Correct the environment Application Insights connection settings and ingestion access then verify signals
  2. Correct the app manifest telemetry configuration and verify emitted events carry the right app identity
  3. Instrument the missing business paths with appropriate feature telemetry and exclude confidential field values
  4. Reproduce with telemetry, identify the expensive operation and optimize that path before retesting

Explanation

Correct Answer

D:

Reproduce with telemetry, identify the expensive operation and optimize that path before retesting. This directly addresses the remaining defect for the requirement—A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck. It restores the mechanism described here: performance work should target observed long-running calls rather than speculative components.

Incorrect Answers

A:

This correction is for the separate condition: A support team wants error and latency signals from an on-premises Business Central instance into Azure Monitor. It would not directly restore the intended behavior in this situation: A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck. Here, reproduce with telemetry, identify the expensive operation and optimize that path before retesting, because performance work should target observed long-running calls rather than speculative components.

B:

This correction is for the separate condition: A partner needs platform-generated diagnostics for only one extension across tenants, rather than new manual feature telemetry or whole-environment traces. It would not directly restore the intended behavior in this situation: A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck. Here, reproduce with telemetry, identify the expensive operation and optimize that path before retesting, because performance work should target observed long-running calls rather than speculative components.

C:

This correction is for the separate condition: An invoice approval extension needs explicit business-level counters beyond generic page-open telemetry. It would not directly restore the intended behavior in this situation: A large extension's posting route is slow but the team optimizes UI rendering without evidence of the bottleneck. Here, reproduce with telemetry, identify the expensive operation and optimize that path before retesting, because performance work should target observed long-running calls rather than speculative components.

Question 709

A warehouse application sometimes times out and engineers guess which database operation is expensive. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Enable and verify environment-level telemetry to the intended Application Insights resource
  2. Use timing and performance telemetry to locate the measured slow operation before optimizing
  3. Configure supported app-level Application Insights telemetry for the extension
  4. Emit purposeful custom feature telemetry such as usage, uptake and error signals

Explanation

Correct Answer

B:

This targets the concrete requirement—A warehouse application sometimes times out and engineers guess which database operation is expensive. Performance work should target observed long-running calls rather than speculative components. The team can establish success when instrumented measurements identify a slow code path and show reduced duration after a controlled fix.

Incorrect Answers

A:

This choice primarily fits a different requirement: An administrator needs diagnostic telemetry from a Business Central online production environment that currently has no Application Insights connection. There, environment-level telemetry sends service operation events to azure application insights for monitoring and troubleshooting. In the current situation, A warehouse application sometimes times out and engineers guess which database operation is expensive. Performance work should target observed long-running calls rather than speculative components. Acceptance requires instrumented measurements identify a slow code path and show reduced duration after a controlled fix.

C:

This choice primarily fits a different requirement: A marketplace app publisher wants platform-emitted runtime errors and app lifecycle telemetry from only its extension across customer tenants, without adding new feature-specific events. There, application-level telemetry can emit extension-related events to an app publisher's resource separately from general environment telemetry. In the current situation, A warehouse application sometimes times out and engineers guess which database operation is expensive. Performance work should target observed long-running calls rather than speculative components. Acceptance requires instrumented measurements identify a slow code path and show reduced duration after a controlled fix.

D:

This choice primarily fits a different requirement: A custom discount capability needs a measurable signal when users discover, activate and successfully use it. There, custom feature telemetry records application-specific behavior that generic infrastructure events may not reveal. In the current situation, A warehouse application sometimes times out and engineers guess which database operation is expensive. Performance work should target observed long-running calls rather than speculative components. Acceptance requires instrumented measurements identify a slow code path and show reduced duration after a controlled fix.

Question 710

A warehouse application sometimes times out and engineers guess which database operation is expensive. The developer recommends the following change: Use timing and performance telemetry to locate the measured slow operation before optimizing. Which technical explanation most directly justifies it in this case?

  1. Environment-level telemetry sends service operation events to Azure Application Insights for monitoring and troubleshooting
  2. Application-level telemetry can emit extension-related events to an app publisher's resource separately from general environment telemetry
  3. Performance work should target observed long-running calls rather than speculative components
  4. Custom feature telemetry records application-specific behavior that generic infrastructure events may not reveal

Explanation

Correct Answer

C:

Performance work should target observed long-running calls rather than speculative components. It connects the proposed action to the exact failure or requirement—A warehouse application sometimes times out and engineers guess which database operation is expensive. Confirmation would be instrumented measurements identify a slow code path and show reduced duration after a controlled fix.

Incorrect Answers

A:

That mechanism explains why the alternative action—enable and verify environment-level telemetry to the intended application insights resource—helps in another case. It does not justify the proposed fix here; performance work should target observed long-running calls rather than speculative components. The distinguishing requirement is: A warehouse application sometimes times out and engineers guess which database operation is expensive.

B:

That mechanism explains why the alternative action—configure supported app-level application insights telemetry for the extension—helps in another case. It does not justify the proposed fix here; performance work should target observed long-running calls rather than speculative components. The distinguishing requirement is: A warehouse application sometimes times out and engineers guess which database operation is expensive.

D:

That mechanism explains why the alternative action—emit purposeful custom feature telemetry such as usage, uptake and error signals—helps in another case. It does not justify the proposed fix here; performance work should target observed long-running calls rather than speculative components. The distinguishing requirement is: A warehouse application sometimes times out and engineers guess which database operation is expensive.


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