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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 67

Question 660

A test reports success even when a returned amount is off by one because it checks only that execution completed. A targeted trial still reproduces the original gap after the team attempted this change: Add explicit value and record-state assertions for the expected business outcome. Which repair directly addresses the remaining defect?

  1. Correct the pipeline gate so failed tests block promotion and artifacts come from the validated revision
  2. Add or repair the Test method and assertions in the test codeunit for the actual business rule
  3. Adjust test isolation or fixture cleanup so each test begins from a known database state
  4. Add the missing expected-value checks and negative fixtures instead of testing only for lack of exceptions

Explanation

Correct Answer

D:

Add the missing expected-value checks and negative fixtures instead of testing only for lack of exceptions. This directly addresses the remaining defect for the requirement—A test reports success even when a returned amount is off by one because it checks only that execution completed. It restores the mechanism described here: test execution without assertions can miss incorrect results; assertions compare measured state against the rule.

Incorrect Answers

A:

This correction is for the separate condition: A partner automatically promotes a payment add-on without retaining its test-run report or source revision. It would not directly restore the intended behavior in this situation: A test reports success even when a returned amount is off by one because it checks only that execution completed. Here, add the missing expected-value checks and negative fixtures instead of testing only for lack of exceptions, because test execution without assertions can miss incorrect results; assertions compare measured state against the rule.

B:

This correction is for the separate condition: A shipping add-on needs regression tests for a codeunit's charge calculation after deployment. It would not directly restore the intended behavior in this situation: A test reports success even when a returned amount is off by one because it checks only that execution completed. Here, add the missing expected-value checks and negative fixtures instead of testing only for lack of exceptions, because test execution without assertions can miss incorrect results; assertions compare measured state against the rule.

C:

This correction is for the separate condition: Two warehouse tests pass separately but fail together because one test leaves mutated records behind. It would not directly restore the intended behavior in this situation: A test reports success even when a returned amount is off by one because it checks only that execution completed. Here, add the missing expected-value checks and negative fixtures instead of testing only for lack of exceptions, because test execution without assertions can miss incorrect results; assertions compare measured state against the rule.

Question 661

A warehouse integration test has no assertion about actual records written after the service call. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Gate release promotion on the relevant automated test results and traceable artifact version
  2. Add explicit value and record-state assertions for the expected business outcome
  3. Create a SubType Test codeunit with Test methods that assert expected results
  4. Use suitable test transaction isolation and controlled fixture setup

Explanation

Correct Answer

B:

This targets the concrete requirement—A warehouse integration test has no assertion about actual records written after the service call. Test execution without assertions can miss incorrect results; assertions compare measured state against the rule. The team can establish success when a seeded incorrect result makes the test fail and a correct result passes with an observable assertion.

Incorrect Answers

A:

This choice primarily fits a different requirement: A release pipeline packages an AL app even though the regression suite has failing validation tests. There, a controlled ci/cd quality gate ties a deployable package to tested source and an acceptable test run. In the current situation, A warehouse integration test has no assertion about actual records written after the service call. Test execution without assertions can miss incorrect results; assertions compare measured state against the rule. Acceptance requires a seeded incorrect result makes the test fail and a correct result passes with an observable assertion.

C:

This choice primarily fits a different requirement: A customer pricing extension requires automated AL verification that its discount rule calculates correctly. There, Business Central al test codeunits execute test methods to verify business behavior under controlled input. In the current situation, A warehouse integration test has no assertion about actual records written after the service call. Test execution without assertions can miss incorrect results; assertions compare measured state against the rule. Acceptance requires a seeded incorrect result makes the test fail and a correct result passes with an observable assertion.

D:

This choice primarily fits a different requirement: A test changes a customer record and contaminates the next test's expected data. There, independent test transactions and deliberate isolation prevent one test's data changes from corrupting later test outcomes. In the current situation, A warehouse integration test has no assertion about actual records written after the service call. Test execution without assertions can miss incorrect results; assertions compare measured state against the rule. Acceptance requires a seeded incorrect result makes the test fail and a correct result passes with an observable assertion.

Question 662

A warehouse integration test has no assertion about actual records written after the service call. The developer recommends the following change: Add explicit value and record-state assertions for the expected business outcome. Which technical explanation most directly justifies it in this case?

  1. A controlled CI/CD quality gate ties a deployable package to tested source and an acceptable test run
  2. Business Central AL Test codeunits execute test methods to verify business behavior under controlled input
  3. Test execution without assertions can miss incorrect results; assertions compare measured state against the rule
  4. Independent test transactions and deliberate isolation prevent one test's data changes from corrupting later test outcomes

Explanation

Correct Answer

C:

Test execution without assertions can miss incorrect results; assertions compare measured state against the rule. It connects the proposed action to the exact failure or requirement—A warehouse integration test has no assertion about actual records written after the service call. Confirmation would be a seeded incorrect result makes the test fail and a correct result passes with an observable assertion.

Incorrect Answers

A:

That mechanism explains why the alternative action—gate release promotion on the relevant automated test results and traceable artifact version—helps in another case. It does not justify the proposed fix here; test execution without assertions can miss incorrect results; assertions compare measured state against the rule. The distinguishing requirement is: A warehouse integration test has no assertion about actual records written after the service call.

B:

That mechanism explains why the alternative action—create a subtype test codeunit with test methods that assert expected results—helps in another case. It does not justify the proposed fix here; test execution without assertions can miss incorrect results; assertions compare measured state against the rule. The distinguishing requirement is: A warehouse integration test has no assertion about actual records written after the service call.

D:

That mechanism explains why the alternative action—use suitable test transaction isolation and controlled fixture setup—helps in another case. It does not justify the proposed fix here; test execution without assertions can miss incorrect results; assertions compare measured state against the rule. The distinguishing requirement is: A warehouse integration test has no assertion about actual records written after the service call.

Question 663

A warehouse integration test has no assertion about actual records written after the service call. The team implemented a change aligned with this plan: Add explicit value and record-state assertions for the expected business outcome. Which acceptance result specifically verifies that the reported problem is resolved?

  1. Only a passing test build is promoted, with a verifiable build ID and test evidence
  2. A test fixture passes for the valid input and fails for a deliberately incorrect computed amount
  3. Tests pass in isolation and as a suite with consistent starting records
  4. A seeded incorrect result makes the test fail and a correct result passes with an observable assertion

Explanation

Correct Answer

D:

A seeded incorrect result makes the test fail and a correct result passes with an observable assertion. This is stronger than an unrelated health check because the desired design action is add explicit value and record-state assertions for the expected business outcome, and test execution without assertions can miss incorrect results; assertions compare measured state against the rule. The local requirement is: A warehouse integration test has no assertion about actual records written after the service call.

Incorrect Answers

A:

This would verify gate release promotion on the relevant automated test results and traceable artifact version, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A warehouse integration test has no assertion about actual records written after the service call. The decisive local proof is a seeded incorrect result makes the test fail and a correct result passes with an observable assertion.

B:

This would verify create a subtype test codeunit with test methods that assert expected results, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A warehouse integration test has no assertion about actual records written after the service call. The decisive local proof is a seeded incorrect result makes the test fail and a correct result passes with an observable assertion.

C:

This would verify use suitable test transaction isolation and controlled fixture setup, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A warehouse integration test has no assertion about actual records written after the service call. The decisive local proof is a seeded incorrect result makes the test fail and a correct result passes with an observable assertion.

Question 664

A warehouse integration test has no assertion about actual records written after the service call. A targeted trial still reproduces the original gap after the team attempted this change: Add explicit value and record-state assertions for the expected business outcome. Which repair directly addresses the remaining defect?

  1. Add the missing expected-value checks and negative fixtures instead of testing only for lack of exceptions
  2. Correct the pipeline gate so failed tests block promotion and artifacts come from the validated revision
  3. Add or repair the Test method and assertions in the test codeunit for the actual business rule
  4. Adjust test isolation or fixture cleanup so each test begins from a known database state

Explanation

Correct Answer

A:

Add the missing expected-value checks and negative fixtures instead of testing only for lack of exceptions. This directly addresses the remaining defect for the requirement—A warehouse integration test has no assertion about actual records written after the service call. It restores the mechanism described here: test execution without assertions can miss incorrect results; assertions compare measured state against the rule.

Incorrect Answers

B:

This correction is for the separate condition: A partner automatically promotes a payment add-on without retaining its test-run report or source revision. It would not directly restore the intended behavior in this situation: A warehouse integration test has no assertion about actual records written after the service call. Here, add the missing expected-value checks and negative fixtures instead of testing only for lack of exceptions, because test execution without assertions can miss incorrect results; assertions compare measured state against the rule.

C:

This correction is for the separate condition: A shipping add-on needs regression tests for a codeunit's charge calculation after deployment. It would not directly restore the intended behavior in this situation: A warehouse integration test has no assertion about actual records written after the service call. Here, add the missing expected-value checks and negative fixtures instead of testing only for lack of exceptions, because test execution without assertions can miss incorrect results; assertions compare measured state against the rule.

D:

This correction is for the separate condition: Two warehouse tests pass separately but fail together because one test leaves mutated records behind. It would not directly restore the intended behavior in this situation: A warehouse integration test has no assertion about actual records written after the service call. Here, add the missing expected-value checks and negative fixtures instead of testing only for lack of exceptions, because test execution without assertions can miss incorrect results; assertions compare measured state against the rule.

Question 665

A release pipeline packages an AL app even though the regression suite has failing validation tests. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Create a SubType Test codeunit with Test methods that assert expected results
  2. Use suitable test transaction isolation and controlled fixture setup
  3. Gate release promotion on the relevant automated test results and traceable artifact version
  4. Add the appropriate handler methods to simulate expected user interaction in tests

Explanation

Correct Answer

C:

This targets the concrete requirement—A release pipeline packages an AL app even though the regression suite has failing validation tests. A controlled CI/CD quality gate ties a deployable package to tested source and an acceptable test run. The team can establish success when only a passing test build is promoted, with a verifiable build id and test evidence.

Incorrect Answers

A:

This choice primarily fits a different requirement: A customer pricing extension requires automated AL verification that its discount rule calculates correctly. There, Business Central al test codeunits execute test methods to verify business behavior under controlled input. In the current situation, A release pipeline packages an AL app even though the regression suite has failing validation tests. A controlled CI/CD quality gate ties a deployable package to tested source and an acceptable test run. Acceptance requires only a passing test build is promoted, with a verifiable build id and test evidence.

B:

This choice primarily fits a different requirement: A test changes a customer record and contaminates the next test's expected data. There, independent test transactions and deliberate isolation prevent one test's data changes from corrupting later test outcomes. In the current situation, A release pipeline packages an AL app even though the regression suite has failing validation tests. A controlled CI/CD quality gate ties a deployable package to tested source and an acceptable test run. Acceptance requires only a passing test build is promoted, with a verifiable build id and test evidence.

D:

This choice primarily fits a different requirement: An AL test for an approval workflow hangs waiting for a confirmation dialog no human can answer in CI. There, al handler methods can respond to pages, dialogs or confirmations that require user interaction during test execution. In the current situation, A release pipeline packages an AL app even though the regression suite has failing validation tests. A controlled CI/CD quality gate ties a deployable package to tested source and an acceptable test run. Acceptance requires only a passing test build is promoted, with a verifiable build id and test evidence.

Question 666

A release pipeline packages an AL app even though the regression suite has failing validation tests. The developer recommends the following change: Gate release promotion on the relevant automated test results and traceable artifact version. Which technical explanation most directly justifies it in this case?

  1. Business Central AL Test codeunits execute test methods to verify business behavior under controlled input
  2. Independent test transactions and deliberate isolation prevent one test's data changes from corrupting later test outcomes
  3. AL handler methods can respond to pages, dialogs or confirmations that require user interaction during test execution
  4. A controlled CI/CD quality gate ties a deployable package to tested source and an acceptable test run

Explanation

Correct Answer

D:

A controlled CI/CD quality gate ties a deployable package to tested source and an acceptable test run. It connects the proposed action to the exact failure or requirement—A release pipeline packages an AL app even though the regression suite has failing validation tests. Confirmation would be only a passing test build is promoted, with a verifiable build id and test evidence.

Incorrect Answers

A:

That mechanism explains why the alternative action—create a subtype test codeunit with test methods that assert expected results—helps in another case. It does not justify the proposed fix here; a controlled ci/cd quality gate ties a deployable package to tested source and an acceptable test run. The distinguishing requirement is: A release pipeline packages an AL app even though the regression suite has failing validation tests.

B:

That mechanism explains why the alternative action—use suitable test transaction isolation and controlled fixture setup—helps in another case. It does not justify the proposed fix here; a controlled ci/cd quality gate ties a deployable package to tested source and an acceptable test run. The distinguishing requirement is: A release pipeline packages an AL app even though the regression suite has failing validation tests.

C:

That mechanism explains why the alternative action—add the appropriate handler methods to simulate expected user interaction in tests—helps in another case. It does not justify the proposed fix here; a controlled ci/cd quality gate ties a deployable package to tested source and an acceptable test run. The distinguishing requirement is: A release pipeline packages an AL app even though the regression suite has failing validation tests.

Question 667

A release pipeline packages an AL app even though the regression suite has failing validation tests. The team implemented a change aligned with this plan: Gate release promotion on the relevant automated test results and traceable artifact version. Which acceptance result specifically verifies that the reported problem is resolved?

  1. Only a passing test build is promoted, with a verifiable build ID and test evidence
  2. A test fixture passes for the valid input and fails for a deliberately incorrect computed amount
  3. Tests pass in isolation and as a suite with consistent starting records
  4. The test follows the intended dialog branch automatically and verifies the resulting business action

Explanation

Correct Answer

A:

Only a passing test build is promoted, with a verifiable build ID and test evidence. This is stronger than an unrelated health check because the desired design action is gate release promotion on the relevant automated test results and traceable artifact version, and a controlled ci/cd quality gate ties a deployable package to tested source and an acceptable test run. The local requirement is: A release pipeline packages an AL app even though the regression suite has failing validation tests.

Incorrect Answers

B:

This would verify create a subtype test codeunit with test methods that assert expected results, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A release pipeline packages an AL app even though the regression suite has failing validation tests. The decisive local proof is only a passing test build is promoted, with a verifiable build id and test evidence.

C:

This would verify use suitable test transaction isolation and controlled fixture setup, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A release pipeline packages an AL app even though the regression suite has failing validation tests. The decisive local proof is only a passing test build is promoted, with a verifiable build id and test evidence.

D:

This would verify add the appropriate handler methods to simulate expected user interaction in tests, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A release pipeline packages an AL app even though the regression suite has failing validation tests. The decisive local proof is only a passing test build is promoted, with a verifiable build id and test evidence.

Question 668

A release pipeline packages an AL app even though the regression suite has failing validation tests. A targeted trial still reproduces the original gap after the team attempted this change: Gate release promotion on the relevant automated test results and traceable artifact version. Which repair directly addresses the remaining defect?

  1. Add or repair the Test method and assertions in the test codeunit for the actual business rule
  2. Correct the pipeline gate so failed tests block promotion and artifacts come from the validated revision
  3. Adjust test isolation or fixture cleanup so each test begins from a known database state
  4. Add or correct the handler attribute and expected response for the specific UI interaction

Explanation

Correct Answer

B:

Correct the pipeline gate so failed tests block promotion and artifacts come from the validated revision. This directly addresses the remaining defect for the requirement—A release pipeline packages an AL app even though the regression suite has failing validation tests. It restores the mechanism described here: a controlled ci/cd quality gate ties a deployable package to tested source and an acceptable test run.

Incorrect Answers

A:

This correction is for the separate condition: A shipping add-on needs regression tests for a codeunit's charge calculation after deployment. It would not directly restore the intended behavior in this situation: A release pipeline packages an AL app even though the regression suite has failing validation tests. Here, correct the pipeline gate so failed tests block promotion and artifacts come from the validated revision, because a controlled ci/cd quality gate ties a deployable package to tested source and an acceptable test run.

C:

This correction is for the separate condition: Two warehouse tests pass separately but fail together because one test leaves mutated records behind. It would not directly restore the intended behavior in this situation: A release pipeline packages an AL app even though the regression suite has failing validation tests. Here, correct the pipeline gate so failed tests block promotion and artifacts come from the validated revision, because a controlled ci/cd quality gate ties a deployable package to tested source and an acceptable test run.

D:

This correction is for the separate condition: A codeunit test triggers a lookup dialog and fails without a UI session. It would not directly restore the intended behavior in this situation: A release pipeline packages an AL app even though the regression suite has failing validation tests. Here, correct the pipeline gate so failed tests block promotion and artifacts come from the validated revision, because a controlled ci/cd quality gate ties a deployable package to tested source and an acceptable test run.

Question 669

A partner automatically promotes a payment add-on without retaining its test-run report or source revision. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Create a SubType Test codeunit with Test methods that assert expected results
  2. Use suitable test transaction isolation and controlled fixture setup
  3. Add the appropriate handler methods to simulate expected user interaction in tests
  4. Gate release promotion on the relevant automated test results and traceable artifact version

Explanation

Correct Answer

D:

This targets the concrete requirement—A partner automatically promotes a payment add-on without retaining its test-run report or source revision. A controlled CI/CD quality gate ties a deployable package to tested source and an acceptable test run. The team can establish success when only a passing test build is promoted, with a verifiable build id and test evidence.

Incorrect Answers

A:

This choice primarily fits a different requirement: A customer pricing extension requires automated AL verification that its discount rule calculates correctly. There, Business Central al test codeunits execute test methods to verify business behavior under controlled input. In the current situation, A partner automatically promotes a payment add-on without retaining its test-run report or source revision. A controlled CI/CD quality gate ties a deployable package to tested source and an acceptable test run. Acceptance requires only a passing test build is promoted, with a verifiable build id and test evidence.

B:

This choice primarily fits a different requirement: A test changes a customer record and contaminates the next test's expected data. There, independent test transactions and deliberate isolation prevent one test's data changes from corrupting later test outcomes. In the current situation, A partner automatically promotes a payment add-on without retaining its test-run report or source revision. A controlled CI/CD quality gate ties a deployable package to tested source and an acceptable test run. Acceptance requires only a passing test build is promoted, with a verifiable build id and test evidence.

C:

This choice primarily fits a different requirement: An AL test for an approval workflow hangs waiting for a confirmation dialog no human can answer in CI. There, al handler methods can respond to pages, dialogs or confirmations that require user interaction during test execution. In the current situation, A partner automatically promotes a payment add-on without retaining its test-run report or source revision. A controlled CI/CD quality gate ties a deployable package to tested source and an acceptable test run. Acceptance requires only a passing test build is promoted, with a verifiable build id and test evidence.

Question 670

A partner automatically promotes a payment add-on without retaining its test-run report or source revision. The developer recommends the following change: Gate release promotion on the relevant automated test results and traceable artifact version. Which technical explanation most directly justifies it in this case?

  1. A controlled CI/CD quality gate ties a deployable package to tested source and an acceptable test run
  2. Business Central AL Test codeunits execute test methods to verify business behavior under controlled input
  3. Independent test transactions and deliberate isolation prevent one test's data changes from corrupting later test outcomes
  4. AL handler methods can respond to pages, dialogs or confirmations that require user interaction during test execution

Explanation

Correct Answer

A:

A controlled CI/CD quality gate ties a deployable package to tested source and an acceptable test run. It connects the proposed action to the exact failure or requirement—A partner automatically promotes a payment add-on without retaining its test-run report or source revision. Confirmation would be only a passing test build is promoted, with a verifiable build id and test evidence.

Incorrect Answers

B:

That mechanism explains why the alternative action—create a subtype test codeunit with test methods that assert expected results—helps in another case. It does not justify the proposed fix here; a controlled ci/cd quality gate ties a deployable package to tested source and an acceptable test run. The distinguishing requirement is: A partner automatically promotes a payment add-on without retaining its test-run report or source revision.

C:

That mechanism explains why the alternative action—use suitable test transaction isolation and controlled fixture setup—helps in another case. It does not justify the proposed fix here; a controlled ci/cd quality gate ties a deployable package to tested source and an acceptable test run. The distinguishing requirement is: A partner automatically promotes a payment add-on without retaining its test-run report or source revision.

D:

That mechanism explains why the alternative action—add the appropriate handler methods to simulate expected user interaction in tests—helps in another case. It does not justify the proposed fix here; a controlled ci/cd quality gate ties a deployable package to tested source and an acceptable test run. The distinguishing requirement is: A partner automatically promotes a payment add-on without retaining its test-run report or source revision.


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