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Microsoft MB-820 Premium Bundle

MB-820 Premium File: 131 Questions & Answers

Last Update: Oct 12, 2026

MB-820 PDF Study Guide: 948 Pages

$74.99

MB-820 Bundle gives you unlimited access to "MB-820" files. However, this does not replace the need for a .vce exam simulator. To download your .vce exam simulator click here

Microsoft MB-820 Practice Test 48

Question 470

A finance team wants reusable interactive report-like query results in the Business Central UI. The developer recommends the following change: Use a normal query object suitable for viewing its dataset in the application. Which technical explanation most directly justifies it in this case?

  1. Queries can move joins and grouping nearer the data source and reduce redundant AL record iterations
  2. API query objects do not provide entity CRUD; writable entities require an appropriate API page and business rules
  3. A normal query can present its dataset in the client, while API queries are designed for web service consumption
  4. Query dataitems define the tables and links for one combined rowset of related records

Explanation

Correct Answer

C:

A normal query can present its dataset in the client, while API queries are designed for web service consumption. It connects the proposed action to the exact failure or requirement—A finance team wants reusable interactive report-like query results in the Business Central UI. Confirmation would be authorized users can open the query data view and inspect the expected columns and sums.

Incorrect Answers

A:

That mechanism explains why the alternative action—evaluate replacing the record loop with a database-backed query and aggregation—helps in another case. It does not justify the proposed fix here; a normal query can present its dataset in the client, while api queries are designed for web service consumption. The distinguishing requirement is: A finance team wants reusable interactive report-like query results in the Business Central UI.

B:

That mechanism explains why the alternative action—separate read-only api query responsibilities from write-capable api page endpoints—helps in another case. It does not justify the proposed fix here; a normal query can present its dataset in the client, while api queries are designed for web service consumption. The distinguishing requirement is: A finance team wants reusable interactive report-like query results in the Business Central UI.

D:

That mechanism explains why the alternative action—create a query object with linked dataitems and explicit join relationships—helps in another case. It does not justify the proposed fix here; a normal query can present its dataset in the client, while api queries are designed for web service consumption. The distinguishing requirement is: A finance team wants reusable interactive report-like query results in the Business Central UI.

Question 471

A finance team wants reusable interactive report-like query results in the Business Central UI. The team implemented a change aligned with this plan: Use a normal query object suitable for viewing its dataset in the application. Which acceptance result specifically verifies that the reported problem is resolved?

  1. A benchmark on representative data shows correct totals and fewer repetitive database calls
  2. GET succeeds on the query and writes are routed through a separately authorized API page
  3. Sample joined output contains correct child rows per parent without Cartesian multiplication
  4. Authorized users can open the query data view and inspect the expected columns and sums

Explanation

Correct Answer

D:

Authorized users can open the query data view and inspect the expected columns and sums. This is stronger than an unrelated health check because the desired design action is use a normal query object suitable for viewing its dataset in the application, and a normal query can present its dataset in the client, while api queries are designed for web service consumption. The local requirement is: A finance team wants reusable interactive report-like query results in the Business Central UI.

Incorrect Answers

A:

This would verify evaluate replacing the record loop with a database-backed query and aggregation, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A finance team wants reusable interactive report-like query results in the Business Central UI. The decisive local proof is authorized users can open the query data view and inspect the expected columns and sums.

B:

This would verify separate read-only api query responsibilities from write-capable api page endpoints, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A finance team wants reusable interactive report-like query results in the Business Central UI. The decisive local proof is authorized users can open the query data view and inspect the expected columns and sums.

C:

This would verify create a query object with linked dataitems and explicit join relationships, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A finance team wants reusable interactive report-like query results in the Business Central UI. The decisive local proof is authorized users can open the query data view and inspect the expected columns and sums.

Question 472

A finance team wants reusable interactive report-like query results in the Business Central UI. A targeted trial still reproduces the original gap after the team attempted this change: Use a normal query object suitable for viewing its dataset in the application. Which repair directly addresses the remaining defect?

  1. Change the query type and discoverability properties to the intended in-client usage
  2. Refactor the record traversal to a query with correct aggregation and benchmark the filtered result
  3. Route writes to the appropriate API page and remove mutating assumptions from the query endpoint
  4. Fix the query DataItemLink and SQL join semantics before adding more AL record loops

Explanation

Correct Answer

A:

Change the query type and discoverability properties to the intended in-client usage. This directly addresses the remaining defect for the requirement—A finance team wants reusable interactive report-like query results in the Business Central UI. It restores the mechanism described here: a normal query can present its dataset in the client, while api queries are designed for web service consumption.

Incorrect Answers

B:

This correction is for the separate condition: An inventory extension performs repetitive database calls to create a simple grouped stock summary. It would not directly restore the intended behavior in this situation: A finance team wants reusable interactive report-like query results in the Business Central UI. Here, change the query type and discoverability properties to the intended in-client usage, because a normal query can present its dataset in the client, while api queries are designed for web service consumption.

C:

This correction is for the separate condition: A partner exposes an aggregated API query and expects PATCH and POST operations to update source records. It would not directly restore the intended behavior in this situation: A finance team wants reusable interactive report-like query results in the Business Central UI. Here, change the query type and discoverability properties to the intended in-client usage, because a normal query can present its dataset in the client, while api queries are designed for web service consumption.

D:

This correction is for the separate condition: A purchasing dashboard needs vendor details joined with the relevant purchase lines for quick analysis. It would not directly restore the intended behavior in this situation: A finance team wants reusable interactive report-like query results in the Business Central UI. Here, change the query type and discoverability properties to the intended in-client usage, because a normal query can present its dataset in the client, while api queries are designed for web service consumption.

Question 473

A slow AL routine loops through a large invoice table to construct totals one record at a time. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Separate read-only API query responsibilities from write-capable API page endpoints
  2. Create a query object with linked dataitems and explicit join relationships
  3. Evaluate replacing the record loop with a database-backed query and aggregation
  4. Define query columns with aggregation methods and appropriate grouping

Explanation

Correct Answer

C:

This targets the concrete requirement—A slow AL routine loops through a large invoice table to construct totals one record at a time. Queries can move joins and grouping nearer the data source and reduce redundant AL record iterations. The team can establish success when a benchmark on representative data shows correct totals and fewer repetitive database calls.

Incorrect Answers

A:

This choice primarily fits a different requirement: An API query joins several dimensions but the client tries to use it to submit a purchase document. There, api query objects do not provide entity crud; writable entities require an appropriate api page and business rules. In the current situation, A slow AL routine loops through a large invoice table to construct totals one record at a time. Queries can move joins and grouping nearer the data source and reduce redundant AL record iterations. Acceptance requires a benchmark on representative data shows correct totals and fewer repetitive database calls.

B:

This choice primarily fits a different requirement: A reporting team needs a joined view of customers and their invoices without iterating each customer in AL code. There, query dataitems define the tables and links for one combined rowset of related records. In the current situation, A slow AL routine loops through a large invoice table to construct totals one record at a time. Queries can move joins and grouping nearer the data source and reduce redundant AL record iterations. Acceptance requires a benchmark on representative data shows correct totals and fewer repetitive database calls.

D:

This choice primarily fits a different requirement: A product manager needs total shipped quantity per item without manually updating a total field. There, query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. In the current situation, A slow AL routine loops through a large invoice table to construct totals one record at a time. Queries can move joins and grouping nearer the data source and reduce redundant AL record iterations. Acceptance requires a benchmark on representative data shows correct totals and fewer repetitive database calls.

Question 474

A slow AL routine loops through a large invoice table to construct totals one record at a time. The developer recommends the following change: Evaluate replacing the record loop with a database-backed query and aggregation. Which technical explanation most directly justifies it in this case?

  1. API query objects do not provide entity CRUD; writable entities require an appropriate API page and business rules
  2. Query dataitems define the tables and links for one combined rowset of related records
  3. Query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals
  4. Queries can move joins and grouping nearer the data source and reduce redundant AL record iterations

Explanation

Correct Answer

D:

Queries can move joins and grouping nearer the data source and reduce redundant AL record iterations. It connects the proposed action to the exact failure or requirement—A slow AL routine loops through a large invoice table to construct totals one record at a time. Confirmation would be a benchmark on representative data shows correct totals and fewer repetitive database calls.

Incorrect Answers

A:

That mechanism explains why the alternative action—separate read-only api query responsibilities from write-capable api page endpoints—helps in another case. It does not justify the proposed fix here; queries can move joins and grouping nearer the data source and reduce redundant al record iterations. The distinguishing requirement is: A slow AL routine loops through a large invoice table to construct totals one record at a time.

B:

That mechanism explains why the alternative action—create a query object with linked dataitems and explicit join relationships—helps in another case. It does not justify the proposed fix here; queries can move joins and grouping nearer the data source and reduce redundant al record iterations. The distinguishing requirement is: A slow AL routine loops through a large invoice table to construct totals one record at a time.

C:

That mechanism explains why the alternative action—define query columns with aggregation methods and appropriate grouping—helps in another case. It does not justify the proposed fix here; queries can move joins and grouping nearer the data source and reduce redundant al record iterations. The distinguishing requirement is: A slow AL routine loops through a large invoice table to construct totals one record at a time.

Question 475

A slow AL routine loops through a large invoice table to construct totals one record at a time. The team implemented a change aligned with this plan: Evaluate replacing the record loop with a database-backed query and aggregation. Which acceptance result specifically verifies that the reported problem is resolved?

  1. A benchmark on representative data shows correct totals and fewer repetitive database calls
  2. GET succeeds on the query and writes are routed through a separately authorized API page
  3. Sample joined output contains correct child rows per parent without Cartesian multiplication
  4. Query sums and grouped counts match independently calculated ledger totals on a fixture dataset

Explanation

Correct Answer

A:

A benchmark on representative data shows correct totals and fewer repetitive database calls. This is stronger than an unrelated health check because the desired design action is evaluate replacing the record loop with a database-backed query and aggregation, and queries can move joins and grouping nearer the data source and reduce redundant al record iterations. The local requirement is: A slow AL routine loops through a large invoice table to construct totals one record at a time.

Incorrect Answers

B:

This would verify separate read-only api query responsibilities from write-capable api page endpoints, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A slow AL routine loops through a large invoice table to construct totals one record at a time. The decisive local proof is a benchmark on representative data shows correct totals and fewer repetitive database calls.

C:

This would verify create a query object with linked dataitems and explicit join relationships, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A slow AL routine loops through a large invoice table to construct totals one record at a time. The decisive local proof is a benchmark on representative data shows correct totals and fewer repetitive database calls.

D:

This would verify define query columns with aggregation methods and appropriate grouping, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A slow AL routine loops through a large invoice table to construct totals one record at a time. The decisive local proof is a benchmark on representative data shows correct totals and fewer repetitive database calls.

Question 476

A slow AL routine loops through a large invoice table to construct totals one record at a time. A targeted trial still reproduces the original gap after the team attempted this change: Evaluate replacing the record loop with a database-backed query and aggregation. Which repair directly addresses the remaining defect?

  1. Route writes to the appropriate API page and remove mutating assumptions from the query endpoint
  2. Refactor the record traversal to a query with correct aggregation and benchmark the filtered result
  3. Fix the query DataItemLink and SQL join semantics before adding more AL record loops
  4. Correct Method and grouping definitions so aggregations use the intended records

Explanation

Correct Answer

B:

Refactor the record traversal to a query with correct aggregation and benchmark the filtered result. This directly addresses the remaining defect for the requirement—A slow AL routine loops through a large invoice table to construct totals one record at a time. It restores the mechanism described here: queries can move joins and grouping nearer the data source and reduce redundant al record iterations.

Incorrect Answers

A:

This correction is for the separate condition: A partner exposes an aggregated API query and expects PATCH and POST operations to update source records. It would not directly restore the intended behavior in this situation: A slow AL routine loops through a large invoice table to construct totals one record at a time. Here, refactor the record traversal to a query with correct aggregation and benchmark the filtered result, because queries can move joins and grouping nearer the data source and reduce redundant al record iterations.

C:

This correction is for the separate condition: A purchasing dashboard needs vendor details joined with the relevant purchase lines for quick analysis. It would not directly restore the intended behavior in this situation: A slow AL routine loops through a large invoice table to construct totals one record at a time. Here, refactor the record traversal to a query with correct aggregation and benchmark the filtered result, because queries can move joins and grouping nearer the data source and reduce redundant al record iterations.

D:

This correction is for the separate condition: An analyst needs grouped revenue totals by region from existing posted transactions. It would not directly restore the intended behavior in this situation: A slow AL routine loops through a large invoice table to construct totals one record at a time. Here, refactor the record traversal to a query with correct aggregation and benchmark the filtered result, because queries can move joins and grouping nearer the data source and reduce redundant al record iterations.

Question 477

An inventory extension performs repetitive database calls to create a simple grouped stock summary. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Separate read-only API query responsibilities from write-capable API page endpoints
  2. Create a query object with linked dataitems and explicit join relationships
  3. Define query columns with aggregation methods and appropriate grouping
  4. Evaluate replacing the record loop with a database-backed query and aggregation

Explanation

Correct Answer

D:

This targets the concrete requirement—An inventory extension performs repetitive database calls to create a simple grouped stock summary. Queries can move joins and grouping nearer the data source and reduce redundant AL record iterations. The team can establish success when a benchmark on representative data shows correct totals and fewer repetitive database calls.

Incorrect Answers

A:

This choice primarily fits a different requirement: An API query joins several dimensions but the client tries to use it to submit a purchase document. There, api query objects do not provide entity crud; writable entities require an appropriate api page and business rules. In the current situation, An inventory extension performs repetitive database calls to create a simple grouped stock summary. Queries can move joins and grouping nearer the data source and reduce redundant AL record iterations. Acceptance requires a benchmark on representative data shows correct totals and fewer repetitive database calls.

B:

This choice primarily fits a different requirement: A reporting team needs a joined view of customers and their invoices without iterating each customer in AL code. There, query dataitems define the tables and links for one combined rowset of related records. In the current situation, An inventory extension performs repetitive database calls to create a simple grouped stock summary. Queries can move joins and grouping nearer the data source and reduce redundant AL record iterations. Acceptance requires a benchmark on representative data shows correct totals and fewer repetitive database calls.

C:

This choice primarily fits a different requirement: A product manager needs total shipped quantity per item without manually updating a total field. There, query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. In the current situation, An inventory extension performs repetitive database calls to create a simple grouped stock summary. Queries can move joins and grouping nearer the data source and reduce redundant AL record iterations. Acceptance requires a benchmark on representative data shows correct totals and fewer repetitive database calls.

Question 478

An inventory extension performs repetitive database calls to create a simple grouped stock summary. The developer recommends the following change: Evaluate replacing the record loop with a database-backed query and aggregation. Which technical explanation most directly justifies it in this case?

  1. Queries can move joins and grouping nearer the data source and reduce redundant AL record iterations
  2. API query objects do not provide entity CRUD; writable entities require an appropriate API page and business rules
  3. Query dataitems define the tables and links for one combined rowset of related records
  4. Query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals

Explanation

Correct Answer

A:

Queries can move joins and grouping nearer the data source and reduce redundant AL record iterations. It connects the proposed action to the exact failure or requirement—An inventory extension performs repetitive database calls to create a simple grouped stock summary. Confirmation would be a benchmark on representative data shows correct totals and fewer repetitive database calls.

Incorrect Answers

B:

That mechanism explains why the alternative action—separate read-only api query responsibilities from write-capable api page endpoints—helps in another case. It does not justify the proposed fix here; queries can move joins and grouping nearer the data source and reduce redundant al record iterations. The distinguishing requirement is: An inventory extension performs repetitive database calls to create a simple grouped stock summary.

C:

That mechanism explains why the alternative action—create a query object with linked dataitems and explicit join relationships—helps in another case. It does not justify the proposed fix here; queries can move joins and grouping nearer the data source and reduce redundant al record iterations. The distinguishing requirement is: An inventory extension performs repetitive database calls to create a simple grouped stock summary.

D:

That mechanism explains why the alternative action—define query columns with aggregation methods and appropriate grouping—helps in another case. It does not justify the proposed fix here; queries can move joins and grouping nearer the data source and reduce redundant al record iterations. The distinguishing requirement is: An inventory extension performs repetitive database calls to create a simple grouped stock summary.

Question 479

An inventory extension performs repetitive database calls to create a simple grouped stock summary. The team implemented a change aligned with this plan: Evaluate replacing the record loop with a database-backed query and aggregation. Which acceptance result specifically verifies that the reported problem is resolved?

  1. GET succeeds on the query and writes are routed through a separately authorized API page
  2. A benchmark on representative data shows correct totals and fewer repetitive database calls
  3. Sample joined output contains correct child rows per parent without Cartesian multiplication
  4. Query sums and grouped counts match independently calculated ledger totals on a fixture dataset

Explanation

Correct Answer

B:

A benchmark on representative data shows correct totals and fewer repetitive database calls. This is stronger than an unrelated health check because the desired design action is evaluate replacing the record loop with a database-backed query and aggregation, and queries can move joins and grouping nearer the data source and reduce redundant al record iterations. The local requirement is: An inventory extension performs repetitive database calls to create a simple grouped stock summary.

Incorrect Answers

A:

This would verify separate read-only api query responsibilities from write-capable api page endpoints, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: An inventory extension performs repetitive database calls to create a simple grouped stock summary. The decisive local proof is a benchmark on representative data shows correct totals and fewer repetitive database calls.

C:

This would verify create a query object with linked dataitems and explicit join relationships, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: An inventory extension performs repetitive database calls to create a simple grouped stock summary. The decisive local proof is a benchmark on representative data shows correct totals and fewer repetitive database calls.

D:

This would verify define query columns with aggregation methods and appropriate grouping, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: An inventory extension performs repetitive database calls to create a simple grouped stock summary. The decisive local proof is a benchmark on representative data shows correct totals and fewer repetitive database calls.

Question 480

An inventory extension performs repetitive database calls to create a simple grouped stock summary. A targeted trial still reproduces the original gap after the team attempted this change: Evaluate replacing the record loop with a database-backed query and aggregation. Which repair directly addresses the remaining defect?

  1. Route writes to the appropriate API page and remove mutating assumptions from the query endpoint
  2. Fix the query DataItemLink and SQL join semantics before adding more AL record loops
  3. Refactor the record traversal to a query with correct aggregation and benchmark the filtered result
  4. Correct Method and grouping definitions so aggregations use the intended records

Explanation

Correct Answer

C:

Refactor the record traversal to a query with correct aggregation and benchmark the filtered result. This directly addresses the remaining defect for the requirement—An inventory extension performs repetitive database calls to create a simple grouped stock summary. It restores the mechanism described here: queries can move joins and grouping nearer the data source and reduce redundant al record iterations.

Incorrect Answers

A:

This correction is for the separate condition: A partner exposes an aggregated API query and expects PATCH and POST operations to update source records. It would not directly restore the intended behavior in this situation: An inventory extension performs repetitive database calls to create a simple grouped stock summary. Here, refactor the record traversal to a query with correct aggregation and benchmark the filtered result, because queries can move joins and grouping nearer the data source and reduce redundant al record iterations.

B:

This correction is for the separate condition: A purchasing dashboard needs vendor details joined with the relevant purchase lines for quick analysis. It would not directly restore the intended behavior in this situation: An inventory extension performs repetitive database calls to create a simple grouped stock summary. Here, refactor the record traversal to a query with correct aggregation and benchmark the filtered result, because queries can move joins and grouping nearer the data source and reduce redundant al record iterations.

D:

This correction is for the separate condition: An analyst needs grouped revenue totals by region from existing posted transactions. It would not directly restore the intended behavior in this situation: An inventory extension performs repetitive database calls to create a simple grouped stock summary. Here, refactor the record traversal to a query with correct aggregation and benchmark the filtered result, because queries can move joins and grouping nearer the data source and reduce redundant al record iterations.


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