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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 19

Question 180

A data field changes structure in an extension update while existing invoice records must be migrated. A targeted trial still reproduces the original gap after the team attempted this change: Implement an upgrade codeunit and rehearse migration on representative historical records. Which repair directly addresses the remaining defect?

  1. Repair dependency pinning and artifact promotion so the pipeline deploys only its validated build
  2. Point the debugger at the correct environment and executable path, then reproduce and inspect the failing AL call
  3. Rebuild from the approved source revision and deploy that package rather than an untracked local copy
  4. Fix the upgrade codeunit's data conversion and validate the migration against a restored old-version dataset

Explanation

Correct Answer

D:

Fix the upgrade codeunit's data conversion and validate the migration against a restored old-version dataset. This directly addresses the remaining defect for the requirement—A data field changes structure in an extension update while existing invoice records must be migrated. It restores the mechanism described here: upgrade logic maps existing tenant data to the new schema during an app version transition.

Incorrect Answers

A:

This correction is for the separate condition: An extension build generated from one commit works locally but deployment carries an older artifact from another branch. It would not directly restore the intended behavior in this situation: A data field changes structure in an extension update while existing invoice records must be migrated. Here, fix the upgrade codeunit's data conversion and validate the migration against a restored old-version dataset, because upgrade logic maps existing tenant data to the new schema during an app version transition.

B:

This correction is for the separate condition: A supplier rebate extension fails only in a particular codeunit path and support needs to inspect live variables safely in a sandbox. It would not directly restore the intended behavior in this situation: A data field changes structure in an extension update while existing invoice records must be migrated. Here, fix the upgrade codeunit's data conversion and validate the migration against a restored old-version dataset, because upgrade logic maps existing tenant data to the new schema during an app version transition.

C:

This correction is for the separate condition: A release engineer must move a tested finance extension into a managed deployment pipeline from source control. It would not directly restore the intended behavior in this situation: A data field changes structure in an extension update while existing invoice records must be migrated. Here, fix the upgrade codeunit's data conversion and validate the migration against a restored old-version dataset, because upgrade logic maps existing tenant data to the new schema during an app version transition.

Question 181

An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Use a reproducible AL build and release pipeline with fixed source revision and dependency versions
  2. Implement an upgrade codeunit and rehearse migration on representative historical records
  3. Set VS Code breakpoints and debug the extension execution path in the sandbox
  4. Build the AL project into an .app package and promote the tested artifact through the release process

Explanation

Correct Answer

B:

This targets the concrete requirement—An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings. Upgrade logic maps existing tenant data to the new schema during an app version transition. The team can establish success when an upgraded sandbox retains expected historical records and new lookups work after the migration.

Incorrect Answers

A:

This choice primarily fits a different requirement: A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies. There, continuous integration should produce the same versioned package from controlled source and dependencies for promotion. In the current situation, An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings. Upgrade logic maps existing tenant data to the new schema during an app version transition. Acceptance requires an upgraded sandbox retains expected historical records and new lookups work after the migration.

C:

This choice primarily fits a different requirement: An AL developer needs to inspect a record value while a purchase posting subscriber unexpectedly throws an error. There, the al debugger exposes call flow and variable state at the problematic trigger or subscriber. In the current situation, An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings. Upgrade logic maps existing tenant data to the new schema during an app version transition. Acceptance requires an upgraded sandbox retains expected historical records and new lookups work after the migration.

D:

This choice primarily fits a different requirement: A partner needs to deliver a signed-off AL extension binary to an administrator without deploying from a developer workstation. There, al packaging provides a deployable extension artifact decoupled from the developer's interactive editor session. In the current situation, An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings. Upgrade logic maps existing tenant data to the new schema during an app version transition. Acceptance requires an upgraded sandbox retains expected historical records and new lookups work after the migration.

Question 182

An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings. The developer recommends the following change: Implement an upgrade codeunit and rehearse migration on representative historical records. Which technical explanation most directly justifies it in this case?

  1. Continuous integration should produce the same versioned package from controlled source and dependencies for promotion
  2. The AL debugger exposes call flow and variable state at the problematic trigger or subscriber
  3. Upgrade logic maps existing tenant data to the new schema during an app version transition
  4. AL packaging provides a deployable extension artifact decoupled from the developer's interactive editor session

Explanation

Correct Answer

C:

Upgrade logic maps existing tenant data to the new schema during an app version transition. It connects the proposed action to the exact failure or requirement—An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings. Confirmation would be an upgraded sandbox retains expected historical records and new lookups work after the migration.

Incorrect Answers

A:

That mechanism explains why the alternative action—use a reproducible al build and release pipeline with fixed source revision and dependency versions—helps in another case. It does not justify the proposed fix here; upgrade logic maps existing tenant data to the new schema during an app version transition. The distinguishing requirement is: An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings.

B:

That mechanism explains why the alternative action—set vs code breakpoints and debug the extension execution path in the sandbox—helps in another case. It does not justify the proposed fix here; upgrade logic maps existing tenant data to the new schema during an app version transition. The distinguishing requirement is: An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings.

D:

That mechanism explains why the alternative action—build the al project into an .app package and promote the tested artifact through the release process—helps in another case. It does not justify the proposed fix here; upgrade logic maps existing tenant data to the new schema during an app version transition. The distinguishing requirement is: An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings.

Question 183

An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings. The team implemented a change aligned with this plan: Implement an upgrade codeunit and rehearse migration on representative historical records. Which acceptance result specifically verifies that the reported problem is resolved?

  1. Artifact metadata, test results, and release logs all trace to the same approved source commit
  2. A reproducing transaction reaches the breakpoint and the inspected values explain the failing branch
  3. The promoted package ID and version match the tested build and installation passes smoke checks
  4. An upgraded sandbox retains expected historical records and new lookups work after the migration

Explanation

Correct Answer

D:

An upgraded sandbox retains expected historical records and new lookups work after the migration. This is stronger than an unrelated health check because the desired design action is implement an upgrade codeunit and rehearse migration on representative historical records, and upgrade logic maps existing tenant data to the new schema during an app version transition. The local requirement is: An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings.

Incorrect Answers

A:

This would verify use a reproducible al build and release pipeline with fixed source revision and dependency versions, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings. The decisive local proof is an upgraded sandbox retains expected historical records and new lookups work after the migration.

B:

This would verify set vs code breakpoints and debug the extension execution path in the sandbox, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings. The decisive local proof is an upgraded sandbox retains expected historical records and new lookups work after the migration.

C:

This would verify build the al project into an .app package and promote the tested artifact through the release process, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings. The decisive local proof is an upgraded sandbox retains expected historical records and new lookups work after the migration.

Question 184

An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings. A targeted trial still reproduces the original gap after the team attempted this change: Implement an upgrade codeunit and rehearse migration on representative historical records. Which repair directly addresses the remaining defect?

  1. Fix the upgrade codeunit's data conversion and validate the migration against a restored old-version dataset
  2. Repair dependency pinning and artifact promotion so the pipeline deploys only its validated build
  3. Point the debugger at the correct environment and executable path, then reproduce and inspect the failing AL call
  4. Rebuild from the approved source revision and deploy that package rather than an untracked local copy

Explanation

Correct Answer

A:

Fix the upgrade codeunit's data conversion and validate the migration against a restored old-version dataset. This directly addresses the remaining defect for the requirement—An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings. It restores the mechanism described here: upgrade logic maps existing tenant data to the new schema during an app version transition.

Incorrect Answers

B:

This correction is for the separate condition: An extension build generated from one commit works locally but deployment carries an older artifact from another branch. It would not directly restore the intended behavior in this situation: An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings. Here, fix the upgrade codeunit's data conversion and validate the migration against a restored old-version dataset, because upgrade logic maps existing tenant data to the new schema during an app version transition.

C:

This correction is for the separate condition: A supplier rebate extension fails only in a particular codeunit path and support needs to inspect live variables safely in a sandbox. It would not directly restore the intended behavior in this situation: An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings. Here, fix the upgrade codeunit's data conversion and validate the migration against a restored old-version dataset, because upgrade logic maps existing tenant data to the new schema during an app version transition.

D:

This correction is for the separate condition: A release engineer must move a tested finance extension into a managed deployment pipeline from source control. It would not directly restore the intended behavior in this situation: An add-on introduces a revised subscription key and upgrading a populated tenant loses legacy mappings. Here, fix the upgrade codeunit's data conversion and validate the migration against a restored old-version dataset, because upgrade logic maps existing tenant data to the new schema during an app version transition.

Question 185

A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Set VS Code breakpoints and debug the extension execution path in the sandbox
  2. Build the AL project into an .app package and promote the tested artifact through the release process
  3. Use a reproducible AL build and release pipeline with fixed source revision and dependency versions
  4. Generate and maintain XLF translations and use translatable AL captions and labels

Explanation

Correct Answer

C:

This targets the concrete requirement—A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies. Continuous integration should produce the same versioned package from controlled source and dependencies for promotion. The team can establish success when artifact metadata, test results, and release logs all trace to the same approved source commit.

Incorrect Answers

A:

This choice primarily fits a different requirement: An AL developer needs to inspect a record value while a purchase posting subscriber unexpectedly throws an error. There, the al debugger exposes call flow and variable state at the problematic trigger or subscriber. In the current situation, A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies. Continuous integration should produce the same versioned package from controlled source and dependencies for promotion. Acceptance requires artifact metadata, test results, and release logs all trace to the same approved source commit.

B:

This choice primarily fits a different requirement: A partner needs to deliver a signed-off AL extension binary to an administrator without deploying from a developer workstation. There, al packaging provides a deployable extension artifact decoupled from the developer's interactive editor session. In the current situation, A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies. Continuous integration should produce the same versioned package from controlled source and dependencies for promotion. Acceptance requires artifact metadata, test results, and release logs all trace to the same approved source commit.

D:

This choice primarily fits a different requirement: A published translation file shows English labels for a Spanish rollout despite translated captions being available. There, al multilingual support relies on resources that map caption/label identifiers to localized translations. In the current situation, A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies. Continuous integration should produce the same versioned package from controlled source and dependencies for promotion. Acceptance requires artifact metadata, test results, and release logs all trace to the same approved source commit.

Question 186

A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies. The developer recommends the following change: Use a reproducible AL build and release pipeline with fixed source revision and dependency versions. Which technical explanation most directly justifies it in this case?

  1. The AL debugger exposes call flow and variable state at the problematic trigger or subscriber
  2. AL packaging provides a deployable extension artifact decoupled from the developer's interactive editor session
  3. AL multilingual support relies on resources that map caption/label identifiers to localized translations
  4. Continuous integration should produce the same versioned package from controlled source and dependencies for promotion

Explanation

Correct Answer

D:

Continuous integration should produce the same versioned package from controlled source and dependencies for promotion. It connects the proposed action to the exact failure or requirement—A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies. Confirmation would be artifact metadata, test results, and release logs all trace to the same approved source commit.

Incorrect Answers

A:

That mechanism explains why the alternative action—set vs code breakpoints and debug the extension execution path in the sandbox—helps in another case. It does not justify the proposed fix here; continuous integration should produce the same versioned package from controlled source and dependencies for promotion. The distinguishing requirement is: A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies.

B:

That mechanism explains why the alternative action—build the al project into an .app package and promote the tested artifact through the release process—helps in another case. It does not justify the proposed fix here; continuous integration should produce the same versioned package from controlled source and dependencies for promotion. The distinguishing requirement is: A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies.

C:

That mechanism explains why the alternative action—generate and maintain xlf translations and use translatable al captions and labels—helps in another case. It does not justify the proposed fix here; continuous integration should produce the same versioned package from controlled source and dependencies for promotion. The distinguishing requirement is: A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies.

Question 187

A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies. The team implemented a change aligned with this plan: Use a reproducible AL build and release pipeline with fixed source revision and dependency versions. Which acceptance result specifically verifies that the reported problem is resolved?

  1. Artifact metadata, test results, and release logs all trace to the same approved source commit
  2. A reproducing transaction reaches the breakpoint and the inspected values explain the failing branch
  3. The promoted package ID and version match the tested build and installation passes smoke checks
  4. The published language pack shows translated labels for the selected user language and no untranslated hardcoded strings in scope

Explanation

Correct Answer

A:

Artifact metadata, test results, and release logs all trace to the same approved source commit. This is stronger than an unrelated health check because the desired design action is use a reproducible al build and release pipeline with fixed source revision and dependency versions, and continuous integration should produce the same versioned package from controlled source and dependencies for promotion. The local requirement is: A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies.

Incorrect Answers

B:

This would verify set vs code breakpoints and debug the extension execution path in the sandbox, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies. The decisive local proof is artifact metadata, test results, and release logs all trace to the same approved source commit.

C:

This would verify build the al project into an .app package and promote the tested artifact through the release process, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies. The decisive local proof is artifact metadata, test results, and release logs all trace to the same approved source commit.

D:

This would verify generate and maintain xlf translations and use translatable al captions and labels, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies. The decisive local proof is artifact metadata, test results, and release logs all trace to the same approved source commit.

Question 188

A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies. A targeted trial still reproduces the original gap after the team attempted this change: Use a reproducible AL build and release pipeline with fixed source revision and dependency versions. Which repair directly addresses the remaining defect?

  1. Point the debugger at the correct environment and executable path, then reproduce and inspect the failing AL call
  2. Repair dependency pinning and artifact promotion so the pipeline deploys only its validated build
  3. Rebuild from the approved source revision and deploy that package rather than an untracked local copy
  4. Regenerate or correct translation units, remove hardcoded UI text, and ship matching XLF resources

Explanation

Correct Answer

B:

Repair dependency pinning and artifact promotion so the pipeline deploys only its validated build. This directly addresses the remaining defect for the requirement—A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies. It restores the mechanism described here: continuous integration should produce the same versioned package from controlled source and dependencies for promotion.

Incorrect Answers

A:

This correction is for the separate condition: A supplier rebate extension fails only in a particular codeunit path and support needs to inspect live variables safely in a sandbox. It would not directly restore the intended behavior in this situation: A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies. Here, repair dependency pinning and artifact promotion so the pipeline deploys only its validated build, because continuous integration should produce the same versioned package from controlled source and dependencies for promotion.

C:

This correction is for the separate condition: A release engineer must move a tested finance extension into a managed deployment pipeline from source control. It would not directly restore the intended behavior in this situation: A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies. Here, repair dependency pinning and artifact promotion so the pipeline deploys only its validated build, because continuous integration should produce the same versioned package from controlled source and dependencies for promotion.

D:

This correction is for the separate condition: A regional service team updates an AL UI app but German users still see hardcoded help strings. It would not directly restore the intended behavior in this situation: A package passes interactive deployment but fails after a CI build because the pipeline uses inconsistent dependencies. Here, repair dependency pinning and artifact promotion so the pipeline deploys only its validated build, because continuous integration should produce the same versioned package from controlled source and dependencies for promotion.

Question 189

An extension build generated from one commit works locally but deployment carries an older artifact from another branch. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Set VS Code breakpoints and debug the extension execution path in the sandbox
  2. Build the AL project into an .app package and promote the tested artifact through the release process
  3. Generate and maintain XLF translations and use translatable AL captions and labels
  4. Use a reproducible AL build and release pipeline with fixed source revision and dependency versions

Explanation

Correct Answer

D:

This targets the concrete requirement—An extension build generated from one commit works locally but deployment carries an older artifact from another branch. Continuous integration should produce the same versioned package from controlled source and dependencies for promotion. The team can establish success when artifact metadata, test results, and release logs all trace to the same approved source commit.

Incorrect Answers

A:

This choice primarily fits a different requirement: An AL developer needs to inspect a record value while a purchase posting subscriber unexpectedly throws an error. There, the al debugger exposes call flow and variable state at the problematic trigger or subscriber. In the current situation, An extension build generated from one commit works locally but deployment carries an older artifact from another branch. Continuous integration should produce the same versioned package from controlled source and dependencies for promotion. Acceptance requires artifact metadata, test results, and release logs all trace to the same approved source commit.

B:

This choice primarily fits a different requirement: A partner needs to deliver a signed-off AL extension binary to an administrator without deploying from a developer workstation. There, al packaging provides a deployable extension artifact decoupled from the developer's interactive editor session. In the current situation, An extension build generated from one commit works locally but deployment carries an older artifact from another branch. Continuous integration should produce the same versioned package from controlled source and dependencies for promotion. Acceptance requires artifact metadata, test results, and release logs all trace to the same approved source commit.

C:

This choice primarily fits a different requirement: A published translation file shows English labels for a Spanish rollout despite translated captions being available. There, al multilingual support relies on resources that map caption/label identifiers to localized translations. In the current situation, An extension build generated from one commit works locally but deployment carries an older artifact from another branch. Continuous integration should produce the same versioned package from controlled source and dependencies for promotion. Acceptance requires artifact metadata, test results, and release logs all trace to the same approved source commit.

Question 190

An extension build generated from one commit works locally but deployment carries an older artifact from another branch. The developer recommends the following change: Use a reproducible AL build and release pipeline with fixed source revision and dependency versions. Which technical explanation most directly justifies it in this case?

  1. Continuous integration should produce the same versioned package from controlled source and dependencies for promotion
  2. The AL debugger exposes call flow and variable state at the problematic trigger or subscriber
  3. AL packaging provides a deployable extension artifact decoupled from the developer's interactive editor session
  4. AL multilingual support relies on resources that map caption/label identifiers to localized translations

Explanation

Correct Answer

A:

Continuous integration should produce the same versioned package from controlled source and dependencies for promotion. It connects the proposed action to the exact failure or requirement—An extension build generated from one commit works locally but deployment carries an older artifact from another branch. Confirmation would be artifact metadata, test results, and release logs all trace to the same approved source commit.

Incorrect Answers

B:

That mechanism explains why the alternative action—set vs code breakpoints and debug the extension execution path in the sandbox—helps in another case. It does not justify the proposed fix here; continuous integration should produce the same versioned package from controlled source and dependencies for promotion. The distinguishing requirement is: An extension build generated from one commit works locally but deployment carries an older artifact from another branch.

C:

That mechanism explains why the alternative action—build the al project into an .app package and promote the tested artifact through the release process—helps in another case. It does not justify the proposed fix here; continuous integration should produce the same versioned package from controlled source and dependencies for promotion. The distinguishing requirement is: An extension build generated from one commit works locally but deployment carries an older artifact from another branch.

D:

That mechanism explains why the alternative action—generate and maintain xlf translations and use translatable al captions and labels—helps in another case. It does not justify the proposed fix here; continuous integration should produce the same versioned package from controlled source and dependencies for promotion. The distinguishing requirement is: An extension build generated from one commit works locally but deployment carries an older artifact from another branch.


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