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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 79

Question 780

An extension releases a breaking response-shape change and existing API clients must remain on the previous contract. A targeted trial still reproduces the original gap after the team attempted this change: Maintain explicit API versions and add a new compatible API version for the changed contract. Which repair directly addresses the remaining defect?

  1. Correct the bound action registration and handler implementation so it targets the record safely
  2. Restore the old contract and publish the changed schema through a distinct supported API version
  3. Correct the API read-only configuration and workload routing, and verify platform-specific read-scale-out support
  4. Define a new API page with the correct entity properties and operations instead of extending a standard API page

Explanation

Correct Answer

B:

Restore the old contract and publish the changed schema through a distinct supported API version. This directly addresses the remaining defect for the requirement—An extension releases a breaking response-shape change and existing API clients must remain on the previous contract. It restores the mechanism described here: published api versions allow consumers to migrate deliberately without silently breaking existing calls.

Incorrect Answers

A:

This correction is for the separate condition: A logistics integration must request a controlled operation that applies business validation to an existing record. It would not directly restore the intended behavior in this situation: An extension releases a breaking response-shape change and existing API clients must remain on the previous contract. Here, restore the old contract and publish the changed schema through a distinct supported api version, because published api versions allow consumers to migrate deliberately without silently breaking existing calls.

C:

This correction is for the separate condition: A finance analytics integration wants to read committed reporting data from an appropriate secondary replica where supported. It would not directly restore the intended behavior in this situation: An extension releases a breaking response-shape change and existing API clients must remain on the previous contract. Here, restore the old contract and publish the changed schema through a distinct supported api version, because published api versions allow consumers to migrate deliberately without silently breaking existing calls.

D:

This correction is for the separate condition: A field service app needs a writable Business Central API for an extension's custom maintenance records. It would not directly restore the intended behavior in this situation: An extension releases a breaking response-shape change and existing API clients must remain on the previous contract. Here, restore the old contract and publish the changed schema through a distinct supported api version, because published api versions allow consumers to migrate deliberately without silently breaking existing calls.

Question 781

A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Expose a suitable bound OData action with business logic for the target entity
  2. Evaluate supported read scale-out configuration for compatible Business Central API read traffic
  3. Create an appropriate PageType API page with stable publisher, group, version and entity definitions
  4. Maintain explicit API versions and add a new compatible API version for the changed contract

Explanation

Correct Answer

D:

This targets the concrete requirement—A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract. Published API versions allow consumers to migrate deliberately without silently breaking existing calls. The team can establish success when both approved versions return the documented shapes while clients can opt in to the new version.

Incorrect Answers

A:

This choice primarily fits a different requirement: A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields. There, a bound action associates an operation with a specific entity and executes logic beyond direct field crud. In the current situation, A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract. Published API versions allow consumers to migrate deliberately without silently breaking existing calls. Acceptance requires both approved versions return the documented shapes while clients can opt in to the new version.

B:

This choice primarily fits a different requirement: A high-volume external reporting client produces unnecessary primary-database load with read-heavy API queries. There, read scale-out can direct suitable read requests to a secondary database replica where the deployment supports it. In the current situation, A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract. Published API versions allow consumers to migrate deliberately without silently breaking existing calls. Acceptance requires both approved versions return the documented shapes while clients can opt in to the new version.

C:

This choice primarily fits a different requirement: A customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. There, api pages provide versioned restful odata endpoints supporting entity crud for a source table. In the current situation, A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract. Published API versions allow consumers to migrate deliberately without silently breaking existing calls. Acceptance requires both approved versions return the documented shapes while clients can opt in to the new version.

Question 782

A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract. The developer recommends the following change: Maintain explicit API versions and add a new compatible API version for the changed contract. Which technical explanation most directly justifies it in this case?

  1. Published API versions allow consumers to migrate deliberately without silently breaking existing calls
  2. A bound action associates an operation with a specific entity and executes logic beyond direct field CRUD
  3. Read scale-out can direct suitable read requests to a secondary database replica where the deployment supports it
  4. API pages provide versioned RESTful OData endpoints supporting entity CRUD for a source table

Explanation

Correct Answer

A:

Published API versions allow consumers to migrate deliberately without silently breaking existing calls. It connects the proposed action to the exact failure or requirement—A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract. Confirmation would be both approved versions return the documented shapes while clients can opt in to the new version.

Incorrect Answers

B:

That mechanism explains why the alternative action—expose a suitable bound odata action with business logic for the target entity—helps in another case. It does not justify the proposed fix here; published api versions allow consumers to migrate deliberately without silently breaking existing calls. The distinguishing requirement is: A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract.

C:

That mechanism explains why the alternative action—evaluate supported read scale-out configuration for compatible Business Central api read traffic—helps in another case. It does not justify the proposed fix here; published api versions allow consumers to migrate deliberately without silently breaking existing calls. The distinguishing requirement is: A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract.

D:

That mechanism explains why the alternative action—create an appropriate pagetype api page with stable publisher, group, version and entity definitions—helps in another case. It does not justify the proposed fix here; published api versions allow consumers to migrate deliberately without silently breaking existing calls. The distinguishing requirement is: A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract.

Question 783

A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract. The team implemented a change aligned with this plan: Maintain explicit API versions and add a new compatible API version for the changed contract. Which acceptance result specifically verifies that the reported problem is resolved?

  1. Calling the action against a permitted record runs the intended validation and returns the expected response
  2. Both approved versions return the documented shapes while clients can opt in to the new version
  3. Supported read-only requests return consistent allowed data while primary write operations remain on the proper path
  4. Authorized GET, POST and PATCH tests satisfy the endpoint's entity contract and enforced business rules

Explanation

Correct Answer

B:

Both approved versions return the documented shapes while clients can opt in to the new version. This is stronger than an unrelated health check because the desired design action is maintain explicit api versions and add a new compatible api version for the changed contract, and published api versions allow consumers to migrate deliberately without silently breaking existing calls. The local requirement is: A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract.

Incorrect Answers

A:

This would verify expose a suitable bound odata action with business logic for the target entity, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract. The decisive local proof is both approved versions return the documented shapes while clients can opt in to the new version.

C:

This would verify evaluate supported read scale-out configuration for compatible Business Central api read traffic, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract. The decisive local proof is both approved versions return the documented shapes while clients can opt in to the new version.

D:

This would verify create an appropriate pagetype api page with stable publisher, group, version and entity definitions, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract. The decisive local proof is both approved versions return the documented shapes while clients can opt in to the new version.

Question 784

A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract. A targeted trial still reproduces the original gap after the team attempted this change: Maintain explicit API versions and add a new compatible API version for the changed contract. Which repair directly addresses the remaining defect?

  1. Correct the bound action registration and handler implementation so it targets the record safely
  2. Correct the API read-only configuration and workload routing, and verify platform-specific read-scale-out support
  3. Restore the old contract and publish the changed schema through a distinct supported API version
  4. Define a new API page with the correct entity properties and operations instead of extending a standard API page

Explanation

Correct Answer

C:

Restore the old contract and publish the changed schema through a distinct supported API version. This directly addresses the remaining defect for the requirement—A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract. It restores the mechanism described here: published api versions allow consumers to migrate deliberately without silently breaking existing calls.

Incorrect Answers

A:

This correction is for the separate condition: A logistics integration must request a controlled operation that applies business validation to an existing record. It would not directly restore the intended behavior in this situation: A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract. Here, restore the old contract and publish the changed schema through a distinct supported api version, because published api versions allow consumers to migrate deliberately without silently breaking existing calls.

B:

This correction is for the separate condition: A finance analytics integration wants to read committed reporting data from an appropriate secondary replica where supported. It would not directly restore the intended behavior in this situation: A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract. Here, restore the old contract and publish the changed schema through a distinct supported api version, because published api versions allow consumers to migrate deliberately without silently breaking existing calls.

D:

This correction is for the separate condition: A field service app needs a writable Business Central API for an extension's custom maintenance records. It would not directly restore the intended behavior in this situation: A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract. Here, restore the old contract and publish the changed schema through a distinct supported api version, because published api versions allow consumers to migrate deliberately without silently breaking existing calls.

Question 785

A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Expose a suitable bound OData action with business logic for the target entity
  2. Evaluate supported read scale-out configuration for compatible Business Central API read traffic
  3. Create an appropriate PageType API page with stable publisher, group, version and entity definitions
  4. Use an API query object for read-only combined or aggregated data exposure

Explanation

Correct Answer

A:

This targets the concrete requirement—A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields. A bound action associates an operation with a specific entity and executes logic beyond direct field CRUD. The team can establish success when calling the action against a permitted record runs the intended validation and returns the expected response.

Incorrect Answers

B:

This choice primarily fits a different requirement: A high-volume external reporting client produces unnecessary primary-database load with read-heavy API queries. There, read scale-out can direct suitable read requests to a secondary database replica where the deployment supports it. In the current situation, A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields. A bound action associates an operation with a specific entity and executes logic beyond direct field CRUD. Acceptance requires calling the action against a permitted record runs the intended validation and returns the expected response.

C:

This choice primarily fits a different requirement: A customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. There, api pages provide versioned restful odata endpoints supporting entity crud for a source table. In the current situation, A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields. A bound action associates an operation with a specific entity and executes logic beyond direct field CRUD. Acceptance requires calling the action against a permitted record runs the intended validation and returns the expected response.

D:

This choice primarily fits a different requirement: An external BI platform needs joined purchase and vendor values as read-only aggregated data over REST. There, api queries support versioned read-only rest datasets including joins or aggregation across relevant dataitems. In the current situation, A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields. A bound action associates an operation with a specific entity and executes logic beyond direct field CRUD. Acceptance requires calling the action against a permitted record runs the intended validation and returns the expected response.

Question 786

A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields. The developer recommends the following change: Expose a suitable bound OData action with business logic for the target entity. Which technical explanation most directly justifies it in this case?

  1. Read scale-out can direct suitable read requests to a secondary database replica where the deployment supports it
  2. A bound action associates an operation with a specific entity and executes logic beyond direct field CRUD
  3. API pages provide versioned RESTful OData endpoints supporting entity CRUD for a source table
  4. API queries support versioned read-only REST datasets including joins or aggregation across relevant dataitems

Explanation

Correct Answer

B:

A bound action associates an operation with a specific entity and executes logic beyond direct field CRUD. It connects the proposed action to the exact failure or requirement—A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields. Confirmation would be calling the action against a permitted record runs the intended validation and returns the expected response.

Incorrect Answers

A:

That mechanism explains why the alternative action—evaluate supported read scale-out configuration for compatible Business Central api read traffic—helps in another case. It does not justify the proposed fix here; a bound action associates an operation with a specific entity and executes logic beyond direct field crud. The distinguishing requirement is: A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields.

C:

That mechanism explains why the alternative action—create an appropriate pagetype api page with stable publisher, group, version and entity definitions—helps in another case. It does not justify the proposed fix here; a bound action associates an operation with a specific entity and executes logic beyond direct field crud. The distinguishing requirement is: A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields.

D:

That mechanism explains why the alternative action—use an api query object for read-only combined or aggregated data exposure—helps in another case. It does not justify the proposed fix here; a bound action associates an operation with a specific entity and executes logic beyond direct field crud. The distinguishing requirement is: A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields.

Question 787

A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields. The team implemented a change aligned with this plan: Expose a suitable bound OData action with business logic for the target entity. Which acceptance result specifically verifies that the reported problem is resolved?

  1. Supported read-only requests return consistent allowed data while primary write operations remain on the proper path
  2. Authorized GET, POST and PATCH tests satisfy the endpoint's entity contract and enforced business rules
  3. Calling the action against a permitted record runs the intended validation and returns the expected response
  4. The endpoint returns expected joined or grouped records and does not offer mutation semantics

Explanation

Correct Answer

C:

Calling the action against a permitted record runs the intended validation and returns the expected response. This is stronger than an unrelated health check because the desired design action is expose a suitable bound odata action with business logic for the target entity, and a bound action associates an operation with a specific entity and executes logic beyond direct field crud. The local requirement is: A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields.

Incorrect Answers

A:

This would verify evaluate supported read scale-out configuration for compatible Business Central api read traffic, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields. The decisive local proof is calling the action against a permitted record runs the intended validation and returns the expected response.

B:

This would verify create an appropriate pagetype api page with stable publisher, group, version and entity definitions, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields. The decisive local proof is calling the action against a permitted record runs the intended validation and returns the expected response.

D:

This would verify use an api query object for read-only combined or aggregated data exposure, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields. The decisive local proof is calling the action against a permitted record runs the intended validation and returns the expected response.

Question 788

A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields. A targeted trial still reproduces the original gap after the team attempted this change: Expose a suitable bound OData action with business logic for the target entity. Which repair directly addresses the remaining defect?

  1. Correct the API read-only configuration and workload routing, and verify platform-specific read-scale-out support
  2. Define a new API page with the correct entity properties and operations instead of extending a standard API page
  3. Replace a write-oriented API page design with a properly structured API query and correct grouping
  4. Correct the bound action registration and handler implementation so it targets the record safely

Explanation

Correct Answer

D:

Correct the bound action registration and handler implementation so it targets the record safely. This directly addresses the remaining defect for the requirement—A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields. It restores the mechanism described here: a bound action associates an operation with a specific entity and executes logic beyond direct field crud.

Incorrect Answers

A:

This correction is for the separate condition: A finance analytics integration wants to read committed reporting data from an appropriate secondary replica where supported. It would not directly restore the intended behavior in this situation: A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields. Here, correct the bound action registration and handler implementation so it targets the record safely, because a bound action associates an operation with a specific entity and executes logic beyond direct field crud.

B:

This correction is for the separate condition: A field service app needs a writable Business Central API for an extension's custom maintenance records. It would not directly restore the intended behavior in this situation: A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields. Here, correct the bound action registration and handler implementation so it targets the record safely, because a bound action associates an operation with a specific entity and executes logic beyond direct field crud.

C:

This correction is for the separate condition: An external dashboard wants grouped sales totals from several tables but no write access through the endpoint. It would not directly restore the intended behavior in this situation: A client needs to trigger a Business Central business action on a specific document rather than directly editing many fields. Here, correct the bound action registration and handler implementation so it targets the record safely, because a bound action associates an operation with a specific entity and executes logic beyond direct field crud.

Question 789

A logistics integration must request a controlled operation that applies business validation to an existing record. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Evaluate supported read scale-out configuration for compatible Business Central API read traffic
  2. Expose a suitable bound OData action with business logic for the target entity
  3. Create an appropriate PageType API page with stable publisher, group, version and entity definitions
  4. Use an API query object for read-only combined or aggregated data exposure

Explanation

Correct Answer

B:

This targets the concrete requirement—A logistics integration must request a controlled operation that applies business validation to an existing record. A bound action associates an operation with a specific entity and executes logic beyond direct field CRUD. The team can establish success when calling the action against a permitted record runs the intended validation and returns the expected response.

Incorrect Answers

A:

This choice primarily fits a different requirement: A high-volume external reporting client produces unnecessary primary-database load with read-heavy API queries. There, read scale-out can direct suitable read requests to a secondary database replica where the deployment supports it. In the current situation, A logistics integration must request a controlled operation that applies business validation to an existing record. A bound action associates an operation with a specific entity and executes logic beyond direct field CRUD. Acceptance requires calling the action against a permitted record runs the intended validation and returns the expected response.

C:

This choice primarily fits a different requirement: A customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. There, api pages provide versioned restful odata endpoints supporting entity crud for a source table. In the current situation, A logistics integration must request a controlled operation that applies business validation to an existing record. A bound action associates an operation with a specific entity and executes logic beyond direct field CRUD. Acceptance requires calling the action against a permitted record runs the intended validation and returns the expected response.

D:

This choice primarily fits a different requirement: An external BI platform needs joined purchase and vendor values as read-only aggregated data over REST. There, api queries support versioned read-only rest datasets including joins or aggregation across relevant dataitems. In the current situation, A logistics integration must request a controlled operation that applies business validation to an existing record. A bound action associates an operation with a specific entity and executes logic beyond direct field CRUD. Acceptance requires calling the action against a permitted record runs the intended validation and returns the expected response.

Question 790

A logistics integration must request a controlled operation that applies business validation to an existing record. The developer recommends the following change: Expose a suitable bound OData action with business logic for the target entity. Which technical explanation most directly justifies it in this case?

  1. Read scale-out can direct suitable read requests to a secondary database replica where the deployment supports it
  2. API pages provide versioned RESTful OData endpoints supporting entity CRUD for a source table
  3. A bound action associates an operation with a specific entity and executes logic beyond direct field CRUD
  4. API queries support versioned read-only REST datasets including joins or aggregation across relevant dataitems

Explanation

Correct Answer

C:

A bound action associates an operation with a specific entity and executes logic beyond direct field CRUD. It connects the proposed action to the exact failure or requirement—A logistics integration must request a controlled operation that applies business validation to an existing record. Confirmation would be calling the action against a permitted record runs the intended validation and returns the expected response.

Incorrect Answers

A:

That mechanism explains why the alternative action—evaluate supported read scale-out configuration for compatible Business Central api read traffic—helps in another case. It does not justify the proposed fix here; a bound action associates an operation with a specific entity and executes logic beyond direct field crud. The distinguishing requirement is: A logistics integration must request a controlled operation that applies business validation to an existing record.

B:

That mechanism explains why the alternative action—create an appropriate pagetype api page with stable publisher, group, version and entity definitions—helps in another case. It does not justify the proposed fix here; a bound action associates an operation with a specific entity and executes logic beyond direct field crud. The distinguishing requirement is: A logistics integration must request a controlled operation that applies business validation to an existing record.

D:

That mechanism explains why the alternative action—use an api query object for read-only combined or aggregated data exposure—helps in another case. It does not justify the proposed fix here; a bound action associates an operation with a specific entity and executes logic beyond direct field crud. The distinguishing requirement is: A logistics integration must request a controlled operation that applies business validation to an existing record.


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