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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

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Microsoft MB-820 Practice Test 77

Question 760

A supplier sync process risks logging live access tokens when the remote service returns an error. A targeted trial still reproduces the original gap after the team attempted this change: Keep sensitive credentials in secured configuration and scrub diagnostics around outbound HTTP. Which repair directly addresses the remaining defect?

  1. Remove logged secrets, rotate compromised credentials and move authentication into protected request headers
  2. Correct the request construction or outbound-call permission and inspect response status/content on failure
  3. Fix credential retrieval and the Authorization header format without exposing secrets in logs
  4. Correct the JSON token traversal and type checks and handle absent optional properties explicitly

Explanation

Correct Answer

A:

Remove logged secrets, rotate compromised credentials and move authentication into protected request headers. This directly addresses the remaining defect for the requirement—A supplier sync process risks logging live access tokens when the remote service returns an error. It restores the mechanism described here: secure integration design limits credential exposure in query strings, published source and support traces.

Incorrect Answers

B:

This correction is for the separate condition: A tax extension must submit a structured request to an authorized external tax engine and read its response. It would not directly restore the intended behavior in this situation: A supplier sync process risks logging live access tokens when the remote service returns an error. Here, remove logged secrets, rotate compromised credentials and move authentication into protected request headers, because secure integration design limits credential exposure in query strings, published source and support traces.

C:

This correction is for the separate condition: A reporting endpoint refuses an AL integration because it is missing its approved API credential header. It would not directly restore the intended behavior in this situation: A supplier sync process risks logging live access tokens when the remote service returns an error. Here, remove logged secrets, rotate compromised credentials and move authentication into protected request headers, because secure integration design limits credential exposure in query strings, published source and support traces.

D:

This correction is for the separate condition: A tax service returns structured JSON totals and the extension must extract nested values safely. It would not directly restore the intended behavior in this situation: A supplier sync process risks logging live access tokens when the remote service returns an error. Here, remove logged secrets, rotate compromised credentials and move authentication into protected request headers, because secure integration design limits credential exposure in query strings, published source and support traces.

Question 761

A customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Use an API query object for read-only combined or aggregated data exposure
  2. Maintain explicit API versions and add a new compatible API version for the changed contract
  3. Create an appropriate PageType API page with stable publisher, group, version and entity definitions
  4. Expose a suitable bound OData action with business logic for the target entity

Explanation

Correct Answer

C:

This targets the concrete requirement—A customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. API pages provide versioned RESTful OData endpoints supporting entity CRUD for a source table. The team can establish success when authorized get, post and patch tests satisfy the endpoint's entity contract and enforced business rules.

Incorrect Answers

A:

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 customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. API pages provide versioned RESTful OData endpoints supporting entity CRUD for a source table. Acceptance requires authorized get, post and patch tests satisfy the endpoint's entity contract and enforced business rules.

B:

This choice primarily fits a different requirement: An extension releases a breaking response-shape change and existing API clients must remain on the previous contract. There, published api versions allow consumers to migrate deliberately without silently breaking existing calls. In the current situation, A customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. API pages provide versioned RESTful OData endpoints supporting entity CRUD for a source table. Acceptance requires authorized get, post and patch tests satisfy the endpoint's entity contract and enforced business rules.

D:

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 customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. API pages provide versioned RESTful OData endpoints supporting entity CRUD for a source table. Acceptance requires authorized get, post and patch tests satisfy the endpoint's entity contract and enforced business rules.

Question 762

A customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. The developer recommends the following change: Create an appropriate PageType API page with stable publisher, group, version and entity definitions. Which technical explanation most directly justifies it in this case?

  1. API queries support versioned read-only REST datasets including joins or aggregation across relevant dataitems
  2. Published API versions allow consumers to migrate deliberately without silently breaking existing calls
  3. A bound action associates an operation with a specific entity and executes logic beyond direct field CRUD
  4. API pages provide versioned RESTful OData endpoints supporting entity CRUD for a source table

Explanation

Correct Answer

D:

API pages provide versioned RESTful OData endpoints supporting entity CRUD for a source table. It connects the proposed action to the exact failure or requirement—A customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. Confirmation would be authorized get, post and patch tests satisfy the endpoint's entity contract and enforced business rules.

Incorrect Answers

A:

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; api pages provide versioned restful odata endpoints supporting entity crud for a source table. The distinguishing requirement is: A customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records.

B:

That mechanism explains why the alternative action—maintain explicit api versions and add a new compatible api version for the changed contract—helps in another case. It does not justify the proposed fix here; api pages provide versioned restful odata endpoints supporting entity crud for a source table. The distinguishing requirement is: A customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records.

C:

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; api pages provide versioned restful odata endpoints supporting entity crud for a source table. The distinguishing requirement is: A customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records.

Question 763

A customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. The team implemented a change aligned with this plan: Create an appropriate PageType API page with stable publisher, group, version and entity definitions. Which acceptance result specifically verifies that the reported problem is resolved?

  1. Authorized GET, POST and PATCH tests satisfy the endpoint's entity contract and enforced business rules
  2. The endpoint returns expected joined or grouped records and does not offer mutation semantics
  3. Both approved versions return the documented shapes while clients can opt in to the new version
  4. Calling the action against a permitted record runs the intended validation and returns the expected response

Explanation

Correct Answer

A:

Authorized GET, POST and PATCH tests satisfy the endpoint's entity contract and enforced business rules. This is stronger than an unrelated health check because the desired design action is create an appropriate pagetype api page with stable publisher, group, version and entity definitions, and api pages provide versioned restful odata endpoints supporting entity crud for a source table. The local requirement is: A customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records.

Incorrect Answers

B:

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 customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. The decisive local proof is authorized get, post and patch tests satisfy the endpoint's entity contract and enforced business rules.

C:

This would verify maintain explicit api versions and add a new compatible api version for the changed contract, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. The decisive local proof is authorized get, post and patch tests satisfy the endpoint's entity contract and enforced business rules.

D:

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 customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. The decisive local proof is authorized get, post and patch tests satisfy the endpoint's entity contract and enforced business rules.

Question 764

A customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. A targeted trial still reproduces the original gap after the team attempted this change: Create an appropriate PageType API page with stable publisher, group, version and entity definitions. Which repair directly addresses the remaining defect?

  1. Replace a write-oriented API page design with a properly structured API query and correct grouping
  2. Define a new API page with the correct entity properties and operations instead of extending a standard API page
  3. Restore the old contract and publish the changed schema through a distinct supported API version
  4. Correct the bound action registration and handler implementation so it targets the record safely

Explanation

Correct Answer

B:

Define a new API page with the correct entity properties and operations instead of extending a standard API page. This directly addresses the remaining defect for the requirement—A customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. It restores the mechanism described here: api pages provide versioned restful odata endpoints supporting entity crud for a source table.

Incorrect Answers

A:

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 customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. Here, define a new api page with the correct entity properties and operations instead of extending a standard api page, because api pages provide versioned restful odata endpoints supporting entity crud for a source table.

C:

This correction is for the separate condition: A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract. It would not directly restore the intended behavior in this situation: A customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. Here, define a new api page with the correct entity properties and operations instead of extending a standard api page, because api pages provide versioned restful odata endpoints supporting entity crud for a source table.

D:

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 customer-facing system needs a versioned Business Central REST endpoint to create and update shipment confirmation records. Here, define a new api page with the correct entity properties and operations instead of extending a standard api page, because api pages provide versioned restful odata endpoints supporting entity crud for a source table.

Question 765

A field service app needs a writable Business Central API for an extension's custom maintenance records. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Use an API query object for read-only combined or aggregated data exposure
  2. Maintain explicit API versions and add a new compatible API version for the changed contract
  3. Expose a suitable bound OData action with business logic for the target entity
  4. Create an appropriate PageType API page with stable publisher, group, version and entity definitions

Explanation

Correct Answer

D:

This targets the concrete requirement—A field service app needs a writable Business Central API for an extension's custom maintenance records. API pages provide versioned RESTful OData endpoints supporting entity CRUD for a source table. The team can establish success when authorized get, post and patch tests satisfy the endpoint's entity contract and enforced business rules.

Incorrect Answers

A:

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 field service app needs a writable Business Central API for an extension's custom maintenance records. API pages provide versioned RESTful OData endpoints supporting entity CRUD for a source table. Acceptance requires authorized get, post and patch tests satisfy the endpoint's entity contract and enforced business rules.

B:

This choice primarily fits a different requirement: An extension releases a breaking response-shape change and existing API clients must remain on the previous contract. There, published api versions allow consumers to migrate deliberately without silently breaking existing calls. In the current situation, A field service app needs a writable Business Central API for an extension's custom maintenance records. API pages provide versioned RESTful OData endpoints supporting entity CRUD for a source table. Acceptance requires authorized get, post and patch tests satisfy the endpoint's entity contract and enforced business rules.

C:

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 field service app needs a writable Business Central API for an extension's custom maintenance records. API pages provide versioned RESTful OData endpoints supporting entity CRUD for a source table. Acceptance requires authorized get, post and patch tests satisfy the endpoint's entity contract and enforced business rules.

Question 766

A field service app needs a writable Business Central API for an extension's custom maintenance records. The developer recommends the following change: Create an appropriate PageType API page with stable publisher, group, version and entity definitions. Which technical explanation most directly justifies it in this case?

  1. API pages provide versioned RESTful OData endpoints supporting entity CRUD for a source table
  2. API queries support versioned read-only REST datasets including joins or aggregation across relevant dataitems
  3. Published API versions allow consumers to migrate deliberately without silently breaking existing calls
  4. A bound action associates an operation with a specific entity and executes logic beyond direct field CRUD

Explanation

Correct Answer

A:

API pages provide versioned RESTful OData endpoints supporting entity CRUD for a source table. It connects the proposed action to the exact failure or requirement—A field service app needs a writable Business Central API for an extension's custom maintenance records. Confirmation would be authorized get, post and patch tests satisfy the endpoint's entity contract and enforced business rules.

Incorrect Answers

B:

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; api pages provide versioned restful odata endpoints supporting entity crud for a source table. The distinguishing requirement is: A field service app needs a writable Business Central API for an extension's custom maintenance records.

C:

That mechanism explains why the alternative action—maintain explicit api versions and add a new compatible api version for the changed contract—helps in another case. It does not justify the proposed fix here; api pages provide versioned restful odata endpoints supporting entity crud for a source table. The distinguishing requirement is: A field service app needs a writable Business Central API for an extension's custom maintenance records.

D:

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; api pages provide versioned restful odata endpoints supporting entity crud for a source table. The distinguishing requirement is: A field service app needs a writable Business Central API for an extension's custom maintenance records.

Question 767

A field service app needs a writable Business Central API for an extension's custom maintenance records. The team implemented a change aligned with this plan: Create an appropriate PageType API page with stable publisher, group, version and entity definitions. Which acceptance result specifically verifies that the reported problem is resolved?

  1. The endpoint returns expected joined or grouped records and does not offer mutation semantics
  2. Authorized GET, POST and PATCH tests satisfy the endpoint's entity contract and enforced business rules
  3. Both approved versions return the documented shapes while clients can opt in to the new version
  4. Calling the action against a permitted record runs the intended validation and returns the expected response

Explanation

Correct Answer

B:

Authorized GET, POST and PATCH tests satisfy the endpoint's entity contract and enforced business rules. This is stronger than an unrelated health check because the desired design action is create an appropriate pagetype api page with stable publisher, group, version and entity definitions, and api pages provide versioned restful odata endpoints supporting entity crud for a source table. The local requirement is: A field service app needs a writable Business Central API for an extension's custom maintenance records.

Incorrect Answers

A:

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 field service app needs a writable Business Central API for an extension's custom maintenance records. The decisive local proof is authorized get, post and patch tests satisfy the endpoint's entity contract and enforced business rules.

C:

This would verify maintain explicit api versions and add a new compatible api version for the changed contract, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A field service app needs a writable Business Central API for an extension's custom maintenance records. The decisive local proof is authorized get, post and patch tests satisfy the endpoint's entity contract and enforced business rules.

D:

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 field service app needs a writable Business Central API for an extension's custom maintenance records. The decisive local proof is authorized get, post and patch tests satisfy the endpoint's entity contract and enforced business rules.

Question 768

A field service app needs a writable Business Central API for an extension's custom maintenance records. A targeted trial still reproduces the original gap after the team attempted this change: Create an appropriate PageType API page with stable publisher, group, version and entity definitions. Which repair directly addresses the remaining defect?

  1. Replace a write-oriented API page design with a properly structured API query and correct grouping
  2. Restore the old contract and publish the changed schema through a distinct supported API version
  3. Define a new API page with the correct entity properties and operations instead of extending a standard API page
  4. Correct the bound action registration and handler implementation so it targets the record safely

Explanation

Correct Answer

C:

Define a new API page with the correct entity properties and operations instead of extending a standard API page. This directly addresses the remaining defect for the requirement—A field service app needs a writable Business Central API for an extension's custom maintenance records. It restores the mechanism described here: api pages provide versioned restful odata endpoints supporting entity crud for a source table.

Incorrect Answers

A:

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 field service app needs a writable Business Central API for an extension's custom maintenance records. Here, define a new api page with the correct entity properties and operations instead of extending a standard api page, because api pages provide versioned restful odata endpoints supporting entity crud for a source table.

B:

This correction is for the separate condition: A shipping integration adds new fields but a legacy partner still depends on the old endpoint contract. It would not directly restore the intended behavior in this situation: A field service app needs a writable Business Central API for an extension's custom maintenance records. Here, define a new api page with the correct entity properties and operations instead of extending a standard api page, because api pages provide versioned restful odata endpoints supporting entity crud for a source table.

D:

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 field service app needs a writable Business Central API for an extension's custom maintenance records. Here, define a new api page with the correct entity properties and operations instead of extending a standard api page, because api pages provide versioned restful odata endpoints supporting entity crud for a source table.

Question 769

An external BI platform needs joined purchase and vendor values as read-only aggregated data over REST. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Use an API query object for read-only combined or aggregated data exposure
  2. Maintain explicit API versions and add a new compatible API version for the changed contract
  3. Expose a suitable bound OData action with business logic for the target entity
  4. Evaluate supported read scale-out configuration for compatible Business Central API read traffic

Explanation

Correct Answer

A:

This targets the concrete requirement—An external BI platform needs joined purchase and vendor values as read-only aggregated data over REST. API queries support versioned read-only REST datasets including joins or aggregation across relevant dataitems. The team can establish success when the endpoint returns expected joined or grouped records and does not offer mutation semantics.

Incorrect Answers

B:

This choice primarily fits a different requirement: An extension releases a breaking response-shape change and existing API clients must remain on the previous contract. There, published api versions allow consumers to migrate deliberately without silently breaking existing calls. In the current situation, An external BI platform needs joined purchase and vendor values as read-only aggregated data over REST. API queries support versioned read-only REST datasets including joins or aggregation across relevant dataitems. Acceptance requires the endpoint returns expected joined or grouped records and does not offer mutation semantics.

C:

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, An external BI platform needs joined purchase and vendor values as read-only aggregated data over REST. API queries support versioned read-only REST datasets including joins or aggregation across relevant dataitems. Acceptance requires the endpoint returns expected joined or grouped records and does not offer mutation semantics.

D:

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, An external BI platform needs joined purchase and vendor values as read-only aggregated data over REST. API queries support versioned read-only REST datasets including joins or aggregation across relevant dataitems. Acceptance requires the endpoint returns expected joined or grouped records and does not offer mutation semantics.

Question 770

An external BI platform needs joined purchase and vendor values as read-only aggregated data over REST. The developer recommends the following change: Use an API query object for read-only combined or aggregated data exposure. 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. API queries support versioned read-only REST datasets including joins or aggregation across relevant dataitems
  3. A bound action associates an operation with a specific entity and executes logic beyond direct field CRUD
  4. Read scale-out can direct suitable read requests to a secondary database replica where the deployment supports it

Explanation

Correct Answer

B:

API queries support versioned read-only REST datasets including joins or aggregation across relevant dataitems. It connects the proposed action to the exact failure or requirement—An external BI platform needs joined purchase and vendor values as read-only aggregated data over REST. Confirmation would be the endpoint returns expected joined or grouped records and does not offer mutation semantics.

Incorrect Answers

A:

That mechanism explains why the alternative action—maintain explicit api versions and add a new compatible api version for the changed contract—helps in another case. It does not justify the proposed fix here; api queries support versioned read-only rest datasets including joins or aggregation across relevant dataitems. The distinguishing requirement is: An external BI platform needs joined purchase and vendor values as read-only aggregated data over REST.

C:

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; api queries support versioned read-only rest datasets including joins or aggregation across relevant dataitems. The distinguishing requirement is: An external BI platform needs joined purchase and vendor values as read-only aggregated data over REST.

D:

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; api queries support versioned read-only rest datasets including joins or aggregation across relevant dataitems. The distinguishing requirement is: An external BI platform needs joined purchase and vendor values as read-only aggregated data over REST.


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