McAfee Secure

Microsoft MB-820 Bundle

Exam Code: MB-820

Exam Name Microsoft Dynamics 365 Business Central Developer

Certification Provider: Microsoft

Corresponding Certification: Microsoft Certified: Dynamics 365 Business Central Developer Associate

Microsoft MB-820 Bundle $19.99

100% Microsoft MB-820 Guaranteed Success With Testking Training Materials

Get Real MB-820 Exam Questions & Expert Verified Answers as Experienced on the Real Exam!

  • Questions & Answers

    MB-820 Questions & Answers

    131 Questions & Answers

    The ultimate exam preparation tool, Questions & Answers mirrors the actual MB-820 exam while allowing you to hone and measure every aspect of your test-taking ability.

  • Study Guide

    MB-820 Study Guide

    948 PDF Pages

    Developed by industry experts, this 948-page guide spells out in painstaking detail all of the information you need to ace MB-820 exam.

Microsoft Dynamics 365 Business Central Developer (MB-820) Practice Tests

Satisfaction Guaranteed

Money Back Guarantee

Testking provides hassle-free money back guarantee with our products. That is because we have 100% trust in the abilities of our professional and experience product team, and our record is a proof of that.

99.6% PASS RATE
Total Cost: $154.98
Bundle Price: $134.99

Purchase Individually

  • Questions & Answers

    Questions & Answers

    131 Questions

    $124.99
  • Study Guide

    Study Guide

    948 PDF Pages

    $29.99

Microsoft MB-820 Practice Test 66

Question 650

At fictional Evergreen Print, the Business Central development team is supporting print production scheduling and reviewing object model and application extensibility during a sandbox design review (MB820-3.4-103). The observed development issue is that a business process needs initial setup data on first install and updated configuration during an app version change. Which recurring engineering check would best prevent this issue from returning?

  1. Test all business entry points for the rule.
  2. Test both zero-data and historical-data upgrade paths.
  3. Use unit tests to detect divergent calculation paths.
  4. Scan high-impact extension code for unexpected commits.

Explanation

Correct Answer

B:

The ongoing check is to test both zero-data and historical-data upgrade paths. This helps detect recurrence when a business process needs initial setup data on first install and updated configuration during an app version change. The associated correction is to use distinct Install and Upgrade codeunits, implementing the appropriate lifecycle triggers; a confirming result is that fresh installations and upgrades apply only their intended initialization or migration actions. Applied here, the relevant facts are: The observed development issue is that a business process needs initial setup data on first install and updated configuration during an app version change. The question asks which recurring engineering check would best prevent this issue from returning.

Incorrect Answers

A:

“Test all business entry points for the rule” supports the separate task “subscribe to an appropriate published business event or design a reusable codeunit validation at the relevant process boundary”, not the reported problem: a business process needs initial setup data on first install and updated configuration during an app version change. This case instead calls for “Test both zero-data and historical-data upgrade paths”.

C:

“Use unit tests to detect divergent calculation paths” concerns the alternative task “move reusable logic to an appropriate codeunit and call it through a stable interface”, but the stated failure is that a business process needs initial setup data on first install and updated configuration during an app version change. The required measure is to test both zero-data and historical-data upgrade paths.

D:

The proposed “Scan high-impact extension code for unexpected commits” tests a different control: review transaction boundaries and remove unintended commits from reusable business logic. The reported condition is that a business process needs initial setup data on first install and updated configuration during an app version change; the more direct action is to test both zero-data and historical-data upgrade paths.

Question 651

At fictional Evergreen Print, the Business Central development team is supporting print production scheduling and reviewing object model and application extensibility during a sandbox design review (MB820-3.4-103). The observed development issue is that a business process needs initial setup data on first install and updated configuration during an app version change. Which observed result would most clearly show the intended correction works?

  1. Repeated calls with the same inputs produce consistent values.
  2. Fresh installations and upgrades apply only their intended initialization or migration actions.
  3. The rule is applied consistently across UI and API posting paths where the event is invoked.
  4. The extension does not crash on supported event variants.

Explanation

Correct Answer

B:

This is the outcome that directly verifies the intended correction: fresh installations and upgrades apply only their intended initialization or migration actions. The related solution is to use distinct Install and Upgrade codeunits, implementing the appropriate lifecycle triggers; it is based on the principle that app installation and data upgrade are different lifecycle events. Applied here, the relevant facts are: The observed development issue is that a business process needs initial setup data on first install and updated configuration during an app version change. The question asks which observed result would most clearly show the intended correction works.

Incorrect Answers

A:

“Repeated calls with the same inputs produce consistent values” concerns the separate step “refactor it to accept explicit inputs and return a well-defined result without hidden mutable dependencies”. The reported issue is that a business process needs initial setup data on first install and updated configuration during an app version change, so the direct response is to fresh installations and upgrades apply only their intended initialization or migration actions.

C:

The proposed “The rule is applied consistently across UI and API posting paths where the event is invoked” tests a different control: subscribe to an appropriate published business event or design a reusable codeunit validation at the relevant process boundary. The reported condition is that a business process needs initial setup data on first install and updated configuration during an app version change; the more direct action is to fresh installations and upgrades apply only their intended initialization or migration actions.

D:

“The extension does not crash on supported event variants” supports the separate task “inspect the event signature and handle missing or incomplete values according to contract”, not the reported problem: a business process needs initial setup data on first install and updated configuration during an app version change. This case instead calls for “Fresh installations and upgrades apply only their intended initialization or migration actions”.

Question 652

At fictional Evergreen Print, the Business Central development team is supporting print production scheduling and reviewing object model and application extensibility during a sandbox design review (MB820-3.4-103). The observed development issue is that a business process needs initial setup data on first install and updated configuration during an app version change. Which AL development or design response most directly addresses this issue?

  1. Preserve error meaning and stop or compensate the transaction rather than falsely reporting success.
  2. Restrict the procedure's access with appropriate AL access modifiers and resource permissions.
  3. Use distinct Install and Upgrade codeunits, implementing the appropriate lifecycle triggers.
  4. Inspect the event signature and handle missing or incomplete values according to contract.

Explanation

Correct Answer

C:

The most direct corrective response is to use distinct Install and Upgrade codeunits, implementing the appropriate lifecycle triggers. This addresses the specific failure where a business process needs initial setup data on first install and updated configuration during an app version change. Acceptance evidence is that fresh installations and upgrades apply only their intended initialization or migration actions. Applied here, the relevant facts are: The observed development issue is that a business process needs initial setup data on first install and updated configuration during an app version change. The question asks which AL development or design response most directly addresses this issue.

Incorrect Answers

A:

“Preserve error meaning and stop or compensate the transaction rather than falsely reporting success” concerns the alternative task “preserve error meaning and stop or compensate the transaction rather than falsely reporting success”, but the stated failure is that a business process needs initial setup data on first install and updated configuration during an app version change. The required measure is to use distinct Install and Upgrade codeunits, implementing the appropriate lifecycle triggers.

B:

The proposed “Restrict the procedure's access with appropriate AL access modifiers and resource permissions” tests a different control: restrict the procedure's access with appropriate AL access modifiers and resource permissions. The reported condition is that a business process needs initial setup data on first install and updated configuration during an app version change; the more direct action is to use distinct Install and Upgrade codeunits, implementing the appropriate lifecycle triggers.

D:

“Inspect the event signature and handle missing or incomplete values according to contract” concerns the separate step “inspect the event signature and handle missing or incomplete values according to contract”. The reported issue is that a business process needs initial setup data on first install and updated configuration during an app version change, so the direct response is to use distinct Install and Upgrade codeunits, implementing the appropriate lifecycle triggers.

Question 653

At fictional Valley Media, the Business Central development team is supporting advertising orders and invoices and reviewing AL business logic and user experience during a source-control pull request (MB820-4.3-148). The observed development issue is that a custom procedure accepts an account number as free text and silently stores invalid values. Which observed result would most clearly show the intended correction works?

  1. The update runs field validation and prevents inconsistent business state.
  2. A missing record yields a defined outcome instead of an unexpected runtime error.
  3. Only records matching the verified customer criteria are processed.
  4. Invalid values are rejected before record mutation and valid values are stored consistently.

Explanation

Correct Answer

D:

This is the outcome that directly verifies the intended correction: invalid values are rejected before record mutation and valid values are stored consistently. The related solution is to use appropriate AL types, validation logic and explicit procedure parameters; it is based on the principle that typed inputs and validated procedures protect data integrity. Applied here, the relevant facts are: pull request (MB820-4.3-148). The observed development issue is that a custom procedure accepts an account number as free text and silently stores invalid values. The question asks which observed result would most clearly show the intended correction works.

Incorrect Answers

A:

The proposed “The update runs field validation and prevents inconsistent business state” tests a different control: use appropriate Validate calls or supported update APIs before committing the record change. The reported condition is that a custom procedure accepts an account number as free text and silently stores invalid values; the more direct action is to invalid values are rejected before record mutation and valid values are stored consistently.

B:

“A missing record yields a defined outcome instead of an unexpected runtime error” supports the separate task “check the Boolean result of the record lookup and handle not-found cases deliberately”, not the reported problem: a custom procedure accepts an account number as free text and silently stores invalid values. This case instead calls for “Invalid values are rejected before record mutation and valid values are stored consistently”.

C:

“Only records matching the verified customer criteria are processed” concerns the separate step “apply the intended record filter and validate current filter groups when composing queries”. The reported issue is that a custom procedure accepts an account number as free text and silently stores invalid values, so the direct response is to invalid values are rejected before record mutation and valid values are stored consistently.

Question 654

At fictional Valley Media, the Business Central development team is supporting advertising orders and invoices and reviewing AL business logic and user experience during a source-control pull request (MB820-4.3-148). The observed development issue is that a custom procedure accepts an account number as free text and silently stores invalid values. Which Business Central or AL development principle best explains the right response?

  1. Shared business records need concurrency-aware mutation logic.
  2. Record API success conditions must be handled explicitly.
  3. Typed inputs and validated procedures protect data integrity.
  4. Explicit scope and parameters make AL behavior reusable.

Explanation

Correct Answer

C:

The governing principle is that typed inputs and validated procedures protect data integrity. The engineering response is to use appropriate AL types, validation logic and explicit procedure parameters. Verification should show that invalid values are rejected before record mutation and valid values are stored consistently. Applied here, the relevant facts are: pull request (MB820-4.3-148). The observed development issue is that a custom procedure accepts an account number as free text and silently stores invalid values. The question asks which Business Central or AL development principle best explains the right response.

Incorrect Answers

A:

“Shared business records need concurrency-aware mutation logic” supports the separate task “use a controlled concurrency/locking strategy and validate expected record state before updating”, not the reported problem: a custom procedure accepts an account number as free text and silently stores invalid values. This case instead calls for “use appropriate AL types, validation logic and explicit procedure parameters”.

B:

“Record API success conditions must be handled explicitly” concerns the separate step “check the Boolean result of the record lookup and handle not-found cases deliberately”. The reported issue is that a custom procedure accepts an account number as free text and silently stores invalid values, so the direct response is to use appropriate AL types, validation logic and explicit procedure parameters.

D:

The proposed “Explicit scope and parameters make AL behavior reusable” tests a different control: refactor it into a procedure with explicit parameters and local state. The reported condition is that a custom procedure accepts an account number as free text and silently stores invalid values; the more direct action is to use appropriate AL types, validation logic and explicit procedure parameters.

Question 655

At fictional Valley Media, the Business Central development team is supporting advertising orders and invoices and reviewing AL business logic and user experience during a source-control pull request (MB820-4.3-148). The observed development issue is that a custom procedure accepts an account number as free text and silently stores invalid values. Which AL development or design response most directly addresses this issue?

  1. Check the Boolean result of the record lookup and handle not-found cases deliberately.
  2. Refactor it into a procedure with explicit parameters and local state.
  3. Use appropriate AL types, validation logic and explicit procedure parameters.
  4. Use local/internal/protected access boundaries as appropriate to the AL object and intended consumers.

Explanation

Correct Answer

C:

The most direct corrective response is to use appropriate AL types, validation logic and explicit procedure parameters. This addresses the specific failure where a custom procedure accepts an account number as free text and silently stores invalid values. Acceptance evidence is that invalid values are rejected before record mutation and valid values are stored consistently. Applied here, the relevant facts are: pull request (MB820-4.3-148). The observed development issue is that a custom procedure accepts an account number as free text and silently stores invalid values. The question asks which AL development or design response most directly addresses this issue.

Incorrect Answers

A:

“Check the Boolean result of the record lookup and handle not-found cases deliberately” concerns the separate step “check the Boolean result of the record lookup and handle not-found cases deliberately”. The reported issue is that a custom procedure accepts an account number as free text and silently stores invalid values, so the direct response is to use appropriate AL types, validation logic and explicit procedure parameters.

B:

“Refactor it into a procedure with explicit parameters and local state” concerns the alternative task “refactor it into a procedure with explicit parameters and local state”, but the stated failure is that a custom procedure accepts an account number as free text and silently stores invalid values. The required measure is to use appropriate AL types, validation logic and explicit procedure parameters.

D:

“Use local/internal/protected access boundaries as appropriate to the AL object and intended consumers” supports the separate task “use local/internal/protected access boundaries as appropriate to the AL object and intended consumers”, not the reported problem: a custom procedure accepts an account number as free text and silently stores invalid values. This case instead calls for “use appropriate AL types, validation logic and explicit procedure parameters”.

Question 656

At fictional Valley Media, the Business Central development team is supporting advertising orders and invoices and reviewing AL business logic and user experience during a source-control pull request (MB820-4.3-148). The observed development issue is that a custom procedure accepts an account number as free text and silently stores invalid values. Which recurring engineering check would best prevent this issue from returning?

  1. Review data mutation calls for missing validation paths.
  2. Test calculations under multiple client cultures.
  3. Review externally visible procedures in every release.
  4. Test valid and invalid value boundaries.

Explanation

Correct Answer

D:

The ongoing check is to test valid and invalid value boundaries. This helps detect recurrence when a custom procedure accepts an account number as free text and silently stores invalid values. The associated correction is to use appropriate AL types, validation logic and explicit procedure parameters; a confirming result is that invalid values are rejected before record mutation and valid values are stored consistently. Applied here, the relevant facts are: pull request (MB820-4.3-148). The observed development issue is that a custom procedure accepts an account number as free text and silently stores invalid values. The question asks which recurring engineering check would best prevent this issue from returning.

Incorrect Answers

A:

“Review data mutation calls for missing validation paths” concerns the alternative task “use appropriate Validate calls or supported update APIs before committing the record change”, but the stated failure is that a custom procedure accepts an account number as free text and silently stores invalid values. The required measure is to test valid and invalid value boundaries.

B:

The proposed “Test calculations under multiple client cultures” tests a different control: use a suitable Decimal variable and numeric expressions, formatting only at display boundaries. The reported condition is that a custom procedure accepts an account number as free text and silently stores invalid values; the more direct action is to test valid and invalid value boundaries.

C:

“Review externally visible procedures in every release” supports the separate task “use local/internal/protected access boundaries as appropriate to the AL object and intended consumers”, not the reported problem: a custom procedure accepts an account number as free text and silently stores invalid values. This case instead calls for “Test valid and invalid value boundaries”.

Question 657

At fictional Keystone Apparel, the Business Central development team is supporting product catalog and fulfillment and reviewing extension environment and deployment preparation during a production readiness review (MB820-2.1-033). The observed development issue is that a teammate checks secrets directly into app.json to authenticate a development workspace. Which observed result would most clearly show the intended correction works?

  1. The repository contains no credentials while the extension still builds and deploys.
  2. AL symbol download and debugging connect to the approved sandbox rather than production.
  3. Experimental deployments do not modify live company data or affect productive users.
  4. The same app builds with the current system and base app symbols.

Explanation

Correct Answer

A:

This is the outcome that directly verifies the intended correction: the repository contains no credentials while the extension still builds and deploys. The related solution is to keep application metadata separate from secret-bearing connection profiles and use supported secure sign-in; it is based on the principle that source-controlled manifests must not become credential stores. Applied here, the relevant facts are: readiness review (MB820-2.1-033). The observed development issue is that a teammate checks secrets directly into app.json to authenticate a development workspace. The question asks which observed result would most clearly show the intended correction works.

Incorrect Answers

B:

“AL symbol download and debugging connect to the approved sandbox rather than production” supports the separate task “correct the server, environment name, tenant and authentication settings for the intended Business Central sandbox”, not the reported problem: a teammate checks secrets directly into app.json to authenticate a development workspace. This case instead calls for “The repository contains no credentials while the extension still builds and deploys”.

C:

“Experimental deployments do not modify live company data or affect productive users” concerns the separate step “create and target a dedicated sandbox environment with nonproduction data and restricted permissions”. The reported issue is that a teammate checks secrets directly into app.json to authenticate a development workspace, so the direct response is to the repository contains no credentials while the extension still builds and deploys.

D:

“The same app builds with the current system and base app symbols” concerns the alternative task “refresh downloaded symbols and resolve dependency versions against the new application target”, but the stated failure is that a teammate checks secrets directly into app.json to authenticate a development workspace. The required measure is to the repository contains no credentials while the extension still builds and deploys.

Question 658

At fictional Keystone Apparel, the Business Central development team is supporting product catalog and fulfillment and reviewing extension environment and deployment preparation during a production readiness review (MB820-2.1-033). The observed development issue is that a teammate checks secrets directly into app.json to authenticate a development workspace. Which recurring engineering check would best prevent this issue from returning?

  1. Review runtime changes before upgrading compiler tooling.
  2. Lint project configuration for misplaced connection properties.
  3. Run clean symbol restoration on a fresh CI agent.
  4. Scan project configuration for access tokens and connection secrets.

Explanation

Correct Answer

D:

The ongoing check is to scan project configuration for access tokens and connection secrets. This helps detect recurrence when a teammate checks secrets directly into app.json to authenticate a development workspace. The associated correction is to keep application metadata separate from secret-bearing connection profiles and use supported secure sign-in; a confirming result is that the repository contains no credentials while the extension still builds and deploys. Applied here, the relevant facts are: readiness review (MB820-2.1-033). The observed development issue is that a teammate checks secrets directly into app.json to authenticate a development workspace. The question asks which recurring engineering check would best prevent this issue from returning.

Incorrect Answers

A:

“Review runtime changes before upgrading compiler tooling” supports the separate task “align the runtime and platform/application version fields with the supported target environment”, not the reported problem: a teammate checks secrets directly into app.json to authenticate a development workspace. This case instead calls for “Scan project configuration for access tokens and connection secrets”.

B:

“Lint project configuration for misplaced connection properties” concerns the separate step “separate app package identity/version metadata in app.json from run and attach configuration in launch.json”. The reported issue is that a teammate checks secrets directly into app.json to authenticate a development workspace, so the direct response is to scan project configuration for access tokens and connection secrets.

C:

“Run clean symbol restoration on a fresh CI agent” concerns the alternative task “download current symbols and declare the required app dependency with compatible versions”, but the stated failure is that a teammate checks secrets directly into app.json to authenticate a development workspace. The required measure is to scan project configuration for access tokens and connection secrets.

Question 659

At fictional Keystone Apparel, the Business Central development team is supporting product catalog and fulfillment and reviewing extension environment and deployment preparation during a production readiness review (MB820-2.1-033). The observed development issue is that a teammate checks secrets directly into app.json to authenticate a development workspace. Which AL development or design response most directly addresses this issue?

  1. Download current symbols and declare the required app dependency with compatible versions.
  2. Refresh downloaded symbols and resolve dependency versions against the new application target.
  3. Create and target a dedicated sandbox environment with nonproduction data and restricted permissions.
  4. Keep application metadata separate from secret-bearing connection profiles and use supported secure sign-in.

Explanation

Correct Answer

D:

The most direct corrective response is to keep application metadata separate from secret-bearing connection profiles and use supported secure sign-in. This addresses the specific failure where a teammate checks secrets directly into app.json to authenticate a development workspace. Acceptance evidence is that the repository contains no credentials while the extension still builds and deploys. Applied here, the relevant facts are: readiness review (MB820-2.1-033). The observed development issue is that a teammate checks secrets directly into app.json to authenticate a development workspace. The question asks which AL development or design response most directly addresses this issue.

Incorrect Answers

A:

“Download current symbols and declare the required app dependency with compatible versions” concerns the separate step “download current symbols and declare the required app dependency with compatible versions”. The reported issue is that a teammate checks secrets directly into app.json to authenticate a development workspace, so the direct response is to keep application metadata separate from secret-bearing connection profiles and use supported secure sign-in.

B:

“Refresh downloaded symbols and resolve dependency versions against the new application target” concerns the alternative task “refresh downloaded symbols and resolve dependency versions against the new application target”, but the stated failure is that a teammate checks secrets directly into app.json to authenticate a development workspace. The required measure is to keep application metadata separate from secret-bearing connection profiles and use supported secure sign-in.

C:

The proposed “Create and target a dedicated sandbox environment with nonproduction data and restricted permissions” tests a different control: create and target a dedicated sandbox environment with nonproduction data and restricted permissions. The reported condition is that a teammate checks secrets directly into app.json to authenticate a development workspace; the more direct action is to keep application metadata separate from secret-bearing connection profiles and use supported secure sign-in.

Question 660

At fictional Keystone Apparel, the Business Central development team is supporting product catalog and fulfillment and reviewing extension environment and deployment preparation during a production readiness review (MB820-2.1-033). The observed development issue is that a teammate checks secrets directly into app.json to authenticate a development workspace. Which Business Central or AL development principle best explains the right response?

  1. Stale symbol caches can mask compatibility problems.
  2. A multi-app workspace does not imply one combined app identity.
  3. Development connection configuration must identify the target environment accurately.
  4. Source-controlled manifests must not become credential stores.

Explanation

Correct Answer

D:

The governing principle is that source-controlled manifests must not become credential stores. The engineering response is to keep application metadata separate from secret-bearing connection profiles and use supported secure sign-in. Verification should show that the repository contains no credentials while the extension still builds and deploys. Applied here, the relevant facts are: readiness review (MB820-2.1-033). The observed development issue is that a teammate checks secrets directly into app.json to authenticate a development workspace. The question asks which Business Central or AL development principle best explains the right response.

Incorrect Answers

A:

“Stale symbol caches can mask compatibility problems” concerns the alternative task “refresh downloaded symbols and resolve dependency versions against the new application target”, but the stated failure is that a teammate checks secrets directly into app.json to authenticate a development workspace. The required measure is to keep application metadata separate from secret-bearing connection profiles and use supported secure sign-in.

B:

The proposed “A multi-app workspace does not imply one combined app identity” tests a different control: configure an appropriate multi-root workspace and preserve distinct app manifests and dependencies. The reported condition is that a teammate checks secrets directly into app.json to authenticate a development workspace; the more direct action is to keep application metadata separate from secret-bearing connection profiles and use supported secure sign-in.

C:

“Development connection configuration must identify the target environment accurately” supports the separate task “correct the server, environment name, tenant and authentication settings for the intended Business Central sandbox”, not the reported problem: a teammate checks secrets directly into app.json to authenticate a development workspace. This case instead calls for “keep application metadata separate from secret-bearing connection profiles and use supported secure sign-in”.