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MB-820 Premium File: 131 Questions & Answers

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Microsoft MB-820 Premium Bundle
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 45

Question 440

A purchasing dashboard needs vendor details joined with the relevant purchase lines for quick analysis. A targeted trial still reproduces the original gap after the team attempted this change: Create a query object with linked dataitems and explicit join relationships. Which repair directly addresses the remaining defect?

  1. Fix the query DataItemLink and SQL join semantics before adding more AL record loops
  2. Correct Method and grouping definitions so aggregations use the intended records
  3. Repair filters and their placement in the query object, then rerun the constrained fixture
  4. Replace the incorrect API page model with a query type API object and publish its versioned endpoint

Explanation

Correct Answer

A:

Fix the query DataItemLink and SQL join semantics before adding more AL record loops. This directly addresses the remaining defect for the requirement—A purchasing dashboard needs vendor details joined with the relevant purchase lines for quick analysis. It restores the mechanism described here: query dataitems define the tables and links for one combined rowset of related records.

Incorrect Answers

B:

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 purchasing dashboard needs vendor details joined with the relevant purchase lines for quick analysis. Here, fix the query dataitemlink and SQL join semantics before adding more al record loops, because query dataitems define the tables and links for one combined rowset of related records.

C:

This correction is for the separate condition: A warehouse query must return only open records for one location and document status. It would not directly restore the intended behavior in this situation: A purchasing dashboard needs vendor details joined with the relevant purchase lines for quick analysis. Here, fix the query dataitemlink and SQL join semantics before adding more al record loops, because query dataitems define the tables and links for one combined rowset of related records.

D:

This correction is for the separate condition: A BI service wants a versioned REST endpoint returning aggregated order metrics but cannot mutate records. It would not directly restore the intended behavior in this situation: A purchasing dashboard needs vendor details joined with the relevant purchase lines for quick analysis. Here, fix the query dataitemlink and SQL join semantics before adding more al record loops, because query dataitems define the tables and links for one combined rowset of related records.

Question 441

A product manager needs total shipped quantity per item without manually updating a total field. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Apply the right filters to query dataitems or columns before aggregation
  2. Use a PageType API query for a read-only joined or aggregated endpoint
  3. Define query columns with aggregation methods and appropriate grouping
  4. Use a normal query object suitable for viewing its dataset in the application

Explanation

Correct Answer

C:

This targets the concrete requirement—A product manager needs total shipped quantity per item without manually updating a total field. Query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. The team can establish success when query sums and grouped counts match independently calculated ledger totals on a fixture dataset.

Incorrect Answers

A:

This choice primarily fits a different requirement: A month-end reconciliation should include only posted transactions from the fiscal period. There, query filters reduce the source rowset so subsequent joins and aggregates operate on relevant records. In the current situation, A product manager needs total shipped quantity per item without manually updating a total field. Query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. Acceptance requires query sums and grouped counts match independently calculated ledger totals on a fixture dataset.

B:

This choice primarily fits a different requirement: A mobile integration needs a read-only joined dataset combining inventory entries and item metadata. There, Business Central api queries expose read-only odata data and can join sources, unlike api pages intended for entity crud. In the current situation, A product manager needs total shipped quantity per item without manually updating a total field. Query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. Acceptance requires query sums and grouped counts match independently calculated ledger totals on a fixture dataset.

D:

This choice primarily fits a different requirement: A controller needs analysts to open an aggregated dataset interactively from within Business Central. There, a normal query can present its dataset in the client, while api queries are designed for web service consumption. In the current situation, A product manager needs total shipped quantity per item without manually updating a total field. Query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. Acceptance requires query sums and grouped counts match independently calculated ledger totals on a fixture dataset.

Question 442

A product manager needs total shipped quantity per item without manually updating a total field. The developer recommends the following change: Define query columns with aggregation methods and appropriate grouping. Which technical explanation most directly justifies it in this case?

  1. Query filters reduce the source rowset so subsequent joins and aggregates operate on relevant records
  2. Business Central API queries expose read-only OData data and can join sources, unlike API pages intended for entity CRUD
  3. A normal query can present its dataset in the client, while API queries are designed for web service consumption
  4. Query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals

Explanation

Correct Answer

D:

Query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. It connects the proposed action to the exact failure or requirement—A product manager needs total shipped quantity per item without manually updating a total field. Confirmation would be query sums and grouped counts match independently calculated ledger totals on a fixture dataset.

Incorrect Answers

A:

That mechanism explains why the alternative action—apply the right filters to query dataitems or columns before aggregation—helps in another case. It does not justify the proposed fix here; query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. The distinguishing requirement is: A product manager needs total shipped quantity per item without manually updating a total field.

B:

That mechanism explains why the alternative action—use a pagetype api query for a read-only joined or aggregated endpoint—helps in another case. It does not justify the proposed fix here; query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. The distinguishing requirement is: A product manager needs total shipped quantity per item without manually updating a total field.

C:

That mechanism explains why the alternative action—use a normal query object suitable for viewing its dataset in the application—helps in another case. It does not justify the proposed fix here; query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. The distinguishing requirement is: A product manager needs total shipped quantity per item without manually updating a total field.

Question 443

A product manager needs total shipped quantity per item without manually updating a total field. The team implemented a change aligned with this plan: Define query columns with aggregation methods and appropriate grouping. Which acceptance result specifically verifies that the reported problem is resolved?

  1. Query sums and grouped counts match independently calculated ledger totals on a fixture dataset
  2. Results exclude records outside the filter and totals match the same filtered scope
  3. The endpoint returns the joined or aggregated data and rejects write operations
  4. Authorized users can open the query data view and inspect the expected columns and sums

Explanation

Correct Answer

A:

Query sums and grouped counts match independently calculated ledger totals on a fixture dataset. This is stronger than an unrelated health check because the desired design action is define query columns with aggregation methods and appropriate grouping, and query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. The local requirement is: A product manager needs total shipped quantity per item without manually updating a total field.

Incorrect Answers

B:

This would verify apply the right filters to query dataitems or columns before aggregation, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A product manager needs total shipped quantity per item without manually updating a total field. The decisive local proof is query sums and grouped counts match independently calculated ledger totals on a fixture dataset.

C:

This would verify use a pagetype api query for a read-only joined or aggregated endpoint, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A product manager needs total shipped quantity per item without manually updating a total field. The decisive local proof is query sums and grouped counts match independently calculated ledger totals on a fixture dataset.

D:

This would verify use a normal query object suitable for viewing its dataset in the application, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: A product manager needs total shipped quantity per item without manually updating a total field. The decisive local proof is query sums and grouped counts match independently calculated ledger totals on a fixture dataset.

Question 444

A product manager needs total shipped quantity per item without manually updating a total field. A targeted trial still reproduces the original gap after the team attempted this change: Define query columns with aggregation methods and appropriate grouping. Which repair directly addresses the remaining defect?

  1. Repair filters and their placement in the query object, then rerun the constrained fixture
  2. Correct Method and grouping definitions so aggregations use the intended records
  3. Replace the incorrect API page model with a query type API object and publish its versioned endpoint
  4. Change the query type and discoverability properties to the intended in-client usage

Explanation

Correct Answer

B:

Correct Method and grouping definitions so aggregations use the intended records. This directly addresses the remaining defect for the requirement—A product manager needs total shipped quantity per item without manually updating a total field. It restores the mechanism described here: query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals.

Incorrect Answers

A:

This correction is for the separate condition: A warehouse query must return only open records for one location and document status. It would not directly restore the intended behavior in this situation: A product manager needs total shipped quantity per item without manually updating a total field. Here, correct method and grouping definitions so aggregations use the intended records, because query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals.

C:

This correction is for the separate condition: A BI service wants a versioned REST endpoint returning aggregated order metrics but cannot mutate records. It would not directly restore the intended behavior in this situation: A product manager needs total shipped quantity per item without manually updating a total field. Here, correct method and grouping definitions so aggregations use the intended records, because query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals.

D:

This correction is for the separate condition: A finance team wants reusable interactive report-like query results in the Business Central UI. It would not directly restore the intended behavior in this situation: A product manager needs total shipped quantity per item without manually updating a total field. Here, correct method and grouping definitions so aggregations use the intended records, because query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals.

Question 445

An analyst needs grouped revenue totals by region from existing posted transactions. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Apply the right filters to query dataitems or columns before aggregation
  2. Use a PageType API query for a read-only joined or aggregated endpoint
  3. Use a normal query object suitable for viewing its dataset in the application
  4. Define query columns with aggregation methods and appropriate grouping

Explanation

Correct Answer

D:

This targets the concrete requirement—An analyst needs grouped revenue totals by region from existing posted transactions. Query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. The team can establish success when query sums and grouped counts match independently calculated ledger totals on a fixture dataset.

Incorrect Answers

A:

This choice primarily fits a different requirement: A month-end reconciliation should include only posted transactions from the fiscal period. There, query filters reduce the source rowset so subsequent joins and aggregates operate on relevant records. In the current situation, An analyst needs grouped revenue totals by region from existing posted transactions. Query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. Acceptance requires query sums and grouped counts match independently calculated ledger totals on a fixture dataset.

B:

This choice primarily fits a different requirement: A mobile integration needs a read-only joined dataset combining inventory entries and item metadata. There, Business Central api queries expose read-only odata data and can join sources, unlike api pages intended for entity crud. In the current situation, An analyst needs grouped revenue totals by region from existing posted transactions. Query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. Acceptance requires query sums and grouped counts match independently calculated ledger totals on a fixture dataset.

C:

This choice primarily fits a different requirement: A controller needs analysts to open an aggregated dataset interactively from within Business Central. There, a normal query can present its dataset in the client, while api queries are designed for web service consumption. In the current situation, An analyst needs grouped revenue totals by region from existing posted transactions. Query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. Acceptance requires query sums and grouped counts match independently calculated ledger totals on a fixture dataset.

Question 446

An analyst needs grouped revenue totals by region from existing posted transactions. The developer recommends the following change: Define query columns with aggregation methods and appropriate grouping. Which technical explanation most directly justifies it in this case?

  1. Query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals
  2. Query filters reduce the source rowset so subsequent joins and aggregates operate on relevant records
  3. Business Central API queries expose read-only OData data and can join sources, unlike API pages intended for entity CRUD
  4. A normal query can present its dataset in the client, while API queries are designed for web service consumption

Explanation

Correct Answer

A:

Query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. It connects the proposed action to the exact failure or requirement—An analyst needs grouped revenue totals by region from existing posted transactions. Confirmation would be query sums and grouped counts match independently calculated ledger totals on a fixture dataset.

Incorrect Answers

B:

That mechanism explains why the alternative action—apply the right filters to query dataitems or columns before aggregation—helps in another case. It does not justify the proposed fix here; query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. The distinguishing requirement is: An analyst needs grouped revenue totals by region from existing posted transactions.

C:

That mechanism explains why the alternative action—use a pagetype api query for a read-only joined or aggregated endpoint—helps in another case. It does not justify the proposed fix here; query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. The distinguishing requirement is: An analyst needs grouped revenue totals by region from existing posted transactions.

D:

That mechanism explains why the alternative action—use a normal query object suitable for viewing its dataset in the application—helps in another case. It does not justify the proposed fix here; query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. The distinguishing requirement is: An analyst needs grouped revenue totals by region from existing posted transactions.

Question 447

An analyst needs grouped revenue totals by region from existing posted transactions. The team implemented a change aligned with this plan: Define query columns with aggregation methods and appropriate grouping. Which acceptance result specifically verifies that the reported problem is resolved?

  1. Results exclude records outside the filter and totals match the same filtered scope
  2. Query sums and grouped counts match independently calculated ledger totals on a fixture dataset
  3. The endpoint returns the joined or aggregated data and rejects write operations
  4. Authorized users can open the query data view and inspect the expected columns and sums

Explanation

Correct Answer

B:

Query sums and grouped counts match independently calculated ledger totals on a fixture dataset. This is stronger than an unrelated health check because the desired design action is define query columns with aggregation methods and appropriate grouping, and query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals. The local requirement is: An analyst needs grouped revenue totals by region from existing posted transactions.

Incorrect Answers

A:

This would verify apply the right filters to query dataitems or columns before aggregation, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: An analyst needs grouped revenue totals by region from existing posted transactions. The decisive local proof is query sums and grouped counts match independently calculated ledger totals on a fixture dataset.

C:

This would verify use a pagetype api query for a read-only joined or aggregated endpoint, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: An analyst needs grouped revenue totals by region from existing posted transactions. The decisive local proof is query sums and grouped counts match independently calculated ledger totals on a fixture dataset.

D:

This would verify use a normal query object suitable for viewing its dataset in the application, which addresses a different engineering need. It does not demonstrate that the current issue is resolved: An analyst needs grouped revenue totals by region from existing posted transactions. The decisive local proof is query sums and grouped counts match independently calculated ledger totals on a fixture dataset.

Question 448

An analyst needs grouped revenue totals by region from existing posted transactions. A targeted trial still reproduces the original gap after the team attempted this change: Define query columns with aggregation methods and appropriate grouping. Which repair directly addresses the remaining defect?

  1. Repair filters and their placement in the query object, then rerun the constrained fixture
  2. Replace the incorrect API page model with a query type API object and publish its versioned endpoint
  3. Correct Method and grouping definitions so aggregations use the intended records
  4. Change the query type and discoverability properties to the intended in-client usage

Explanation

Correct Answer

C:

Correct Method and grouping definitions so aggregations use the intended records. This directly addresses the remaining defect for the requirement—An analyst needs grouped revenue totals by region from existing posted transactions. It restores the mechanism described here: query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals.

Incorrect Answers

A:

This correction is for the separate condition: A warehouse query must return only open records for one location and document status. It would not directly restore the intended behavior in this situation: An analyst needs grouped revenue totals by region from existing posted transactions. Here, correct method and grouping definitions so aggregations use the intended records, because query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals.

B:

This correction is for the separate condition: A BI service wants a versioned REST endpoint returning aggregated order metrics but cannot mutate records. It would not directly restore the intended behavior in this situation: An analyst needs grouped revenue totals by region from existing posted transactions. Here, correct method and grouping definitions so aggregations use the intended records, because query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals.

D:

This correction is for the separate condition: A finance team wants reusable interactive report-like query results in the Business Central UI. It would not directly restore the intended behavior in this situation: An analyst needs grouped revenue totals by region from existing posted transactions. Here, correct method and grouping definitions so aggregations use the intended records, because query column aggregations calculate summary values from the selected dataset instead of storing duplicate totals.

Question 449

A month-end reconciliation should include only posted transactions from the fiscal period. Which single AL development or architecture change best resolves this requirement without redesigning unrelated workflows?

  1. Apply the right filters to query dataitems or columns before aggregation
  2. Use a PageType API query for a read-only joined or aggregated endpoint
  3. Use a normal query object suitable for viewing its dataset in the application
  4. Evaluate replacing the record loop with a database-backed query and aggregation

Explanation

Correct Answer

A:

This targets the concrete requirement—A month-end reconciliation should include only posted transactions from the fiscal period. Query filters reduce the source rowset so subsequent joins and aggregates operate on relevant records. The team can establish success when results exclude records outside the filter and totals match the same filtered scope.

Incorrect Answers

B:

This choice primarily fits a different requirement: A mobile integration needs a read-only joined dataset combining inventory entries and item metadata. There, Business Central api queries expose read-only odata data and can join sources, unlike api pages intended for entity crud. In the current situation, A month-end reconciliation should include only posted transactions from the fiscal period. Query filters reduce the source rowset so subsequent joins and aggregates operate on relevant records. Acceptance requires results exclude records outside the filter and totals match the same filtered scope.

C:

This choice primarily fits a different requirement: A controller needs analysts to open an aggregated dataset interactively from within Business Central. There, a normal query can present its dataset in the client, while api queries are designed for web service consumption. In the current situation, A month-end reconciliation should include only posted transactions from the fiscal period. Query filters reduce the source rowset so subsequent joins and aggregates operate on relevant records. Acceptance requires results exclude records outside the filter and totals match the same filtered scope.

D:

This choice primarily fits a different requirement: A slow AL routine loops through a large invoice table to construct totals one record at a time. There, queries can move joins and grouping nearer the data source and reduce redundant al record iterations. In the current situation, A month-end reconciliation should include only posted transactions from the fiscal period. Query filters reduce the source rowset so subsequent joins and aggregates operate on relevant records. Acceptance requires results exclude records outside the filter and totals match the same filtered scope.

Question 450

A month-end reconciliation should include only posted transactions from the fiscal period. The developer recommends the following change: Apply the right filters to query dataitems or columns before aggregation. Which technical explanation most directly justifies it in this case?

  1. Business Central API queries expose read-only OData data and can join sources, unlike API pages intended for entity CRUD
  2. Query filters reduce the source rowset so subsequent joins and aggregates operate on relevant records
  3. A normal query can present its dataset in the client, while API queries are designed for web service consumption
  4. Queries can move joins and grouping nearer the data source and reduce redundant AL record iterations

Explanation

Correct Answer

B:

Query filters reduce the source rowset so subsequent joins and aggregates operate on relevant records. It connects the proposed action to the exact failure or requirement—A month-end reconciliation should include only posted transactions from the fiscal period. Confirmation would be results exclude records outside the filter and totals match the same filtered scope.

Incorrect Answers

A:

That mechanism explains why the alternative action—use a pagetype api query for a read-only joined or aggregated endpoint—helps in another case. It does not justify the proposed fix here; query filters reduce the source rowset so subsequent joins and aggregates operate on relevant records. The distinguishing requirement is: A month-end reconciliation should include only posted transactions from the fiscal period.

C:

That mechanism explains why the alternative action—use a normal query object suitable for viewing its dataset in the application—helps in another case. It does not justify the proposed fix here; query filters reduce the source rowset so subsequent joins and aggregates operate on relevant records. The distinguishing requirement is: A month-end reconciliation should include only posted transactions from the fiscal period.

D:

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; query filters reduce the source rowset so subsequent joins and aggregates operate on relevant records. The distinguishing requirement is: A month-end reconciliation should include only posted transactions from the fiscal period.


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