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Microsoft MB-820 Bundle

Exam Code: MB-820

Exam Name Microsoft Dynamics 365 Business Central Developer

Certification Provider: Microsoft

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

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

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Microsoft MB-820 Practice Test 41

Question 400

At fictional Upland Facilities, the Business Central development team is supporting service dispatch and support and reviewing object model and application extensibility during an extension maintenance sprint (MB820-3.2-066). The observed development issue is that a developer changes a report layout but overwrites its dataset, causing legacy calculations to disappear. Which recurring engineering check would best prevent this issue from returning?

  1. Track report duration and query volume after design changes.
  2. Compare dataset fields and output totals after layout changes.
  3. Test one-to-many and zero-child cases.
  4. Test reports with multiple documents and line counts.

Explanation

Correct Answer

B:

The ongoing check is to compare dataset fields and output totals after layout changes. This helps detect recurrence when a developer changes a report layout but overwrites its dataset, causing legacy calculations to disappear. The associated correction is to keep dataset definitions separate from supported report layout updates or extensions; a confirming result is that the layout changes while all required report fields remain available.

Incorrect Answers

A:

“Track report duration and query volume after design changes” concerns the alternative task “move expensive aggregations to appropriate query or dataset design and profile execution”, but the stated failure is that a developer changes a report layout but overwrites its dataset, causing legacy calculations to disappear. The required measure is to compare dataset fields and output totals after layout changes.

C:

“Test one-to-many and zero-child cases” supports the separate task “adjust the parent/child dataitems, grouping and iteration behavior in the report model”, not the reported problem: a developer changes a report layout but overwrites its dataset, causing legacy calculations to disappear. This case instead calls for “Compare dataset fields and output totals after layout changes”.

D:

“Test reports with multiple documents and line counts” concerns the separate step “create a report dataset with appropriate header and line dataitems and related links”. The reported issue is that a developer changes a report layout but overwrites its dataset, causing legacy calculations to disappear, so the direct response is to compare dataset fields and output totals after layout changes.

Question 401

At fictional Willow Foods, the Business Central development team is supporting warehouse quality control and reviewing object model and application extensibility during a tenant acceptance test (MB820-3.6-124). The observed development issue is that an integration needs a structured read-only dataset combining item and category information. Which AL development or design response most directly addresses this issue?

  1. Reevaluate grouping and totals when adding the dimension to the query projection.
  2. Use a query object with an appropriate aggregation method and grouping columns.
  3. Select a supported outer-join or alternative query design that preserves missing related records.
  4. Expose appropriate query columns and links instead of exporting full tables with unused fields.

Explanation

Correct Answer

D:

The most direct corrective response is to expose appropriate query columns and links instead of exporting full tables with unused fields. This addresses the specific failure where an integration needs a structured read-only dataset combining item and category information. Acceptance evidence is that the consumer receives only necessary joined attributes.

Incorrect Answers

A:

The proposed “Reevaluate grouping and totals when adding the dimension to the query projection” tests a different control: reevaluate grouping and totals when adding the dimension to the query projection. The reported condition is that an integration needs a structured read-only dataset combining item and category information; the more direct action is to expose appropriate query columns and links instead of exporting full tables with unused fields.

B:

“Use a query object with an appropriate aggregation method and grouping columns” supports the separate task “use a query object with an appropriate aggregation method and grouping columns”, not the reported problem: an integration needs a structured read-only dataset combining item and category information. This case instead calls for “expose appropriate query columns and links instead of exporting full tables with unused fields”.

C:

“Select a supported outer-join or alternative query design that preserves missing related records” concerns the separate step “select a supported outer-join or alternative query design that preserves missing related records”. The reported issue is that an integration needs a structured read-only dataset combining item and category information, so the direct response is to expose appropriate query columns and links instead of exporting full tables with unused fields.

Question 402

At fictional Willow Foods, the Business Central development team is supporting warehouse quality control and reviewing object model and application extensibility during a tenant acceptance test (MB820-3.6-124). The observed development issue is that an integration needs a structured read-only dataset combining item and category information. Which Business Central or AL development principle best explains the right response?

  1. Join choice decides whether unmatched parent rows survive.
  2. Reports can use query-based aggregation for efficient datasets.
  3. Filtering at the data source reduces unnecessary output and ambiguity.
  4. Query projections support purpose-limited data access.

Explanation

Correct Answer

D:

The governing principle is that query projections support purpose-limited data access. The engineering response is to expose appropriate query columns and links instead of exporting full tables with unused fields. Verification should show that the consumer receives only necessary joined attributes.

Incorrect Answers

A:

“Join choice decides whether unmatched parent rows survive” supports the separate task “select a supported outer-join or alternative query design that preserves missing related records”, not the reported problem: an integration needs a structured read-only dataset combining item and category information. This case instead calls for “expose appropriate query columns and links instead of exporting full tables with unused fields”.

B:

“Reports can use query-based aggregation for efficient datasets” concerns the separate step “reuse a suitable query data source or aggregate dataset design for report data”. The reported issue is that an integration needs a structured read-only dataset combining item and category information, so the direct response is to expose appropriate query columns and links instead of exporting full tables with unused fields.

C:

“Filtering at the data source reduces unnecessary output and ambiguity” concerns the alternative task “apply a correct filter in the query or at the query execution boundary”, but the stated failure is that an integration needs a structured read-only dataset combining item and category information. The required measure is to expose appropriate query columns and links instead of exporting full tables with unused fields.

Question 403

At fictional Willow Foods, the Business Central development team is supporting warehouse quality control and reviewing object model and application extensibility during a tenant acceptance test (MB820-3.6-124). The observed development issue is that an integration needs a structured read-only dataset combining item and category information. Which observed result would most clearly show the intended correction works?

  1. The analytical output is read-only while update operations use authorized logic.
  2. Results retain customers without invoices with appropriately empty joined values.
  3. The consumer receives only necessary joined attributes.
  4. The query returns one summarized row per desired customer period.

Explanation

Correct Answer

C:

This is the outcome that directly verifies the intended correction: the consumer receives only necessary joined attributes. The related solution is to expose appropriate query columns and links instead of exporting full tables with unused fields; it is based on the principle that query projections support purpose-limited data access.

Incorrect Answers

A:

“The analytical output is read-only while update operations use authorized logic” concerns the separate step “use the query for read-oriented analysis and a suitable record/codeunit workflow for writes”. The reported issue is that an integration needs a structured read-only dataset combining item and category information, so the direct response is to the consumer receives only necessary joined attributes.

B:

“Results retain customers without invoices with appropriately empty joined values” concerns the alternative task “select a supported outer-join or alternative query design that preserves missing related records”, but the stated failure is that an integration needs a structured read-only dataset combining item and category information. The required measure is to the consumer receives only necessary joined attributes.

D:

“The query returns one summarized row per desired customer period” supports the separate task “review grouping columns and Sum/Count aggregation placement”, not the reported problem: an integration needs a structured read-only dataset combining item and category information. This case instead calls for “The consumer receives only necessary joined attributes”.

Question 404

At fictional Willow Foods, the Business Central development team is supporting warehouse quality control and reviewing object model and application extensibility during a tenant acceptance test (MB820-3.6-124). The observed development issue is that an integration needs a structured read-only dataset combining item and category information. Which recurring engineering check would best prevent this issue from returning?

  1. Test matched and unmatched dataitem cases.
  2. Reconcile totals across report versions.
  3. Audit exposed query columns for confidential fields.
  4. Test status filter changes and index selectivity.

Explanation

Correct Answer

C:

The ongoing check is to audit exposed query columns for confidential fields. This helps detect recurrence when an integration needs a structured read-only dataset combining item and category information. The associated correction is to expose appropriate query columns and links instead of exporting full tables with unused fields; a confirming result is that the consumer receives only necessary joined attributes.

Incorrect Answers

A:

“Test matched and unmatched dataitem cases” concerns the alternative task “select a supported outer-join or alternative query design that preserves missing related records”, but the stated failure is that an integration needs a structured read-only dataset combining item and category information. The required measure is to audit exposed query columns for confidential fields.

B:

The proposed “Reconcile totals across report versions” tests a different control: reevaluate grouping and totals when adding the dimension to the query projection. The reported condition is that an integration needs a structured read-only dataset combining item and category information; the more direct action is to audit exposed query columns for confidential fields.

D:

“Test status filter changes and index selectivity” concerns the separate step “apply a correct filter in the query or at the query execution boundary”. The reported issue is that an integration needs a structured read-only dataset combining item and category information, so the direct response is to audit exposed query columns for confidential fields.

Question 405

At fictional Trinity Trading, the Business Central development team is supporting cross-border purchasing and reviewing object model and application extensibility during a sandbox design review (MB820-3.6-119). The observed development issue is that a developer loops through thousands of sales ledger entries with Record variables merely to calculate a grouped total. Which Business Central or AL development principle best explains the right response?

  1. Filtering at the data source reduces unnecessary output and ambiguity.
  2. Changing a query's dimensions can alter aggregation grain.
  3. Query projections support purpose-limited data access.
  4. Query objects can push aggregations into the data retrieval layer.

Explanation

Correct Answer

D:

The governing principle is that query objects can push aggregations into the data retrieval layer. The engineering response is to use a query object with an appropriate aggregation method and grouping columns. Verification should show that results match ledger totals while avoiding unnecessary per-row processing.

Incorrect Answers

A:

The proposed “Filtering at the data source reduces unnecessary output and ambiguity” tests a different control: apply a correct filter in the query or at the query execution boundary. The reported condition is that a developer loops through thousands of sales ledger entries with Record variables merely to calculate a grouped total; the more direct action is to use a query object with an appropriate aggregation method and grouping columns.

B:

“Changing a query's dimensions can alter aggregation grain” supports the separate task “reevaluate grouping and totals when adding the dimension to the query projection”, not the reported problem: a developer loops through thousands of sales ledger entries with Record variables merely to calculate a grouped total. This case instead calls for “use a query object with an appropriate aggregation method and grouping columns”.

C:

“Query projections support purpose-limited data access” concerns the separate step “expose appropriate query columns and links instead of exporting full tables with unused fields”. The reported issue is that a developer loops through thousands of sales ledger entries with Record variables merely to calculate a grouped total, so the direct response is to use a query object with an appropriate aggregation method and grouping columns.

Question 406

At fictional Trinity Trading, the Business Central development team is supporting cross-border purchasing and reviewing object model and application extensibility during a sandbox design review (MB820-3.6-119). The observed development issue is that a developer loops through thousands of sales ledger entries with Record variables merely to calculate a grouped total. Which AL development or design response most directly addresses this issue?

  1. Use the query for read-oriented analysis and a suitable record/codeunit workflow for writes.
  2. Use a query object with an appropriate aggregation method and grouping columns.
  3. Review grouping columns and Sum/Count aggregation placement.
  4. Expose appropriate query columns and links instead of exporting full tables with unused fields.

Explanation

Correct Answer

B:

The most direct corrective response is to use a query object with an appropriate aggregation method and grouping columns. This addresses the specific failure where a developer loops through thousands of sales ledger entries with Record variables merely to calculate a grouped total. Acceptance evidence is that results match ledger totals while avoiding unnecessary per-row processing.

Incorrect Answers

A:

“Use the query for read-oriented analysis and a suitable record/codeunit workflow for writes” supports the separate task “use the query for read-oriented analysis and a suitable record/codeunit workflow for writes”, not the reported problem: a developer loops through thousands of sales ledger entries with Record variables merely to calculate a grouped total. This case instead calls for “use a query object with an appropriate aggregation method and grouping columns”.

C:

“Review grouping columns and Sum/Count aggregation placement” concerns the alternative task “review grouping columns and Sum/Count aggregation placement”, but the stated failure is that a developer loops through thousands of sales ledger entries with Record variables merely to calculate a grouped total. The required measure is to use a query object with an appropriate aggregation method and grouping columns.

D:

The proposed “Expose appropriate query columns and links instead of exporting full tables with unused fields” tests a different control: expose appropriate query columns and links instead of exporting full tables with unused fields. The reported condition is that a developer loops through thousands of sales ledger entries with Record variables merely to calculate a grouped total; the more direct action is to use a query object with an appropriate aggregation method and grouping columns.

Question 407

At fictional Trinity Trading, the Business Central development team is supporting cross-border purchasing and reviewing object model and application extensibility during a sandbox design review (MB820-3.6-119). The observed development issue is that a developer loops through thousands of sales ledger entries with Record variables merely to calculate a grouped total. Which observed result would most clearly show the intended correction works?

  1. The consumer receives only necessary joined attributes.
  2. Totals reconcile at both overall and dimension level.
  3. The analytical output is read-only while update operations use authorized logic.
  4. Results match ledger totals while avoiding unnecessary per-row processing.

Explanation

Correct Answer

D:

This is the outcome that directly verifies the intended correction: results match ledger totals while avoiding unnecessary per-row processing. The related solution is to use a query object with an appropriate aggregation method and grouping columns; it is based on the principle that query objects can push aggregations into the data retrieval layer.

Incorrect Answers

A:

“The consumer receives only necessary joined attributes” concerns the separate step “expose appropriate query columns and links instead of exporting full tables with unused fields”. The reported issue is that a developer loops through thousands of sales ledger entries with Record variables merely to calculate a grouped total, so the direct response is to results match ledger totals while avoiding unnecessary per-row processing.

B:

“Totals reconcile at both overall and dimension level” concerns the alternative task “reevaluate grouping and totals when adding the dimension to the query projection”, but the stated failure is that a developer loops through thousands of sales ledger entries with Record variables merely to calculate a grouped total. The required measure is to results match ledger totals while avoiding unnecessary per-row processing.

C:

The proposed “The analytical output is read-only while update operations use authorized logic” tests a different control: use the query for read-oriented analysis and a suitable record/codeunit workflow for writes. The reported condition is that a developer loops through thousands of sales ledger entries with Record variables merely to calculate a grouped total; the more direct action is to results match ledger totals while avoiding unnecessary per-row processing.

Question 408

At fictional Trinity Trading, the Business Central development team is supporting cross-border purchasing and reviewing object model and application extensibility during a sandbox design review (MB820-3.6-119). The observed development issue is that a developer loops through thousands of sales ledger entries with Record variables merely to calculate a grouped total. Which recurring engineering check would best prevent this issue from returning?

  1. Reconcile totals across report versions.
  2. Audit exposed query columns for confidential fields.
  3. Profile query results and execution against representative volumes.
  4. Test one-to-many and missing-child relationships.

Explanation

Correct Answer

C:

The ongoing check is to profile query results and execution against representative volumes. This helps detect recurrence when a developer loops through thousands of sales ledger entries with Record variables merely to calculate a grouped total. The associated correction is to use a query object with an appropriate aggregation method and grouping columns; a confirming result is that results match ledger totals while avoiding unnecessary per-row processing.

Incorrect Answers

A:

“Reconcile totals across report versions” concerns the alternative task “reevaluate grouping and totals when adding the dimension to the query projection”, but the stated failure is that a developer loops through thousands of sales ledger entries with Record variables merely to calculate a grouped total. The required measure is to profile query results and execution against representative volumes.

B:

The proposed “Audit exposed query columns for confidential fields” tests a different control: expose appropriate query columns and links instead of exporting full tables with unused fields. The reported condition is that a developer loops through thousands of sales ledger entries with Record variables merely to calculate a grouped total; the more direct action is to profile query results and execution against representative volumes.

D:

“Test one-to-many and missing-child relationships” concerns the separate step “define the DataItemLink and join type that match the intended relationship”. The reported issue is that a developer loops through thousands of sales ledger entries with Record variables merely to calculate a grouped total, so the direct response is to profile query results and execution against representative volumes.

Question 409

At fictional Riverside Consulting, the Business Central development team is supporting professional project billing and reviewing solution architecture design during an integration contract review (MB820-1.1-002). The observed development issue is that a team deploys unversioned extensions to production and expects scheduled Business Central updates never to change dependent APIs. Which observed result would most clearly show the intended correction works?

  1. An isolated-tenant test shows no unintended cross-tenant records and approved integration transfers only permitted data.
  2. The feature runs without file-system or server-administration privileges in the online target.
  3. The customization is deployed as an app without overwriting Microsoft's application objects.
  4. A sandbox update detects API incompatibility before the live environment is updated.

Explanation

Correct Answer

D:

This is the outcome that directly verifies the intended correction: a sandbox update detects API incompatibility before the live environment is updated. The related solution is to track the platform release cycle and qualify extension versions against available compatibility signals; it is based on the principle that extension lifecycle planning must consider both publisher and platform version changes.

Incorrect Answers

A:

The proposed “An isolated-tenant test shows no unintended cross-tenant records and approved integration transfers only permitted data” tests a different control: design explicit authorized integration rather than assuming Business Central tenant databases share company data. The reported condition is that a team deploys unversioned extensions to production and expects scheduled Business Central updates never to change dependent APIs; the more direct action is to a sandbox update detects API incompatibility before the live environment is updated.

B:

“The feature runs without file-system or server-administration privileges in the online target” supports the separate task “assess deployment-specific restrictions and select cloud-compatible APIs when SaaS must be supported”, not the reported problem: a team deploys unversioned extensions to production and expects scheduled Business Central updates never to change dependent APIs. This case instead calls for “A sandbox update detects API incompatibility before the live environment is updated”.

C:

“The customization is deployed as an app without overwriting Microsoft's application objects” concerns the separate step “design a separate AL extension that adds the required fields and logic through supported extensibility points”. The reported issue is that a team deploys unversioned extensions to production and expects scheduled Business Central updates never to change dependent APIs, so the direct response is to a sandbox update detects API incompatibility before the live environment is updated.

Question 410

At fictional Riverside Consulting, the Business Central development team is supporting professional project billing and reviewing solution architecture design during an integration contract review (MB820-1.1-002). The observed development issue is that a team deploys unversioned extensions to production and expects scheduled Business Central updates never to change dependent APIs. Which AL development or design response most directly addresses this issue?

  1. Design a separate AL extension that adds the required fields and logic through supported extensibility points.
  2. Select supported Business Central capabilities and explicit service integrations for Microsoft 365 workflows.
  3. Track the platform release cycle and qualify extension versions against available compatibility signals.
  4. Design explicit authorized integration rather than assuming Business Central tenant databases share company data.

Explanation

Correct Answer

C:

The most direct corrective response is to track the platform release cycle and qualify extension versions against available compatibility signals. This addresses the specific failure where a team deploys unversioned extensions to production and expects scheduled Business Central updates never to change dependent APIs. Acceptance evidence is that a sandbox update detects API incompatibility before the live environment is updated.

Incorrect Answers

A:

“Design a separate AL extension that adds the required fields and logic through supported extensibility points” supports the separate task “design a separate AL extension that adds the required fields and logic through supported extensibility points”, not the reported problem: a team deploys unversioned extensions to production and expects scheduled Business Central updates never to change dependent APIs. This case instead calls for “track the platform release cycle and qualify extension versions against available compatibility signals”.

B:

“Select supported Business Central capabilities and explicit service integrations for Microsoft 365 workflows” concerns the separate step “select supported Business Central capabilities and explicit service integrations for Microsoft 365 workflows”. The reported issue is that a team deploys unversioned extensions to production and expects scheduled Business Central updates never to change dependent APIs, so the direct response is to track the platform release cycle and qualify extension versions against available compatibility signals.

D:

The proposed “Design explicit authorized integration rather than assuming Business Central tenant databases share company data” tests a different control: design explicit authorized integration rather than assuming Business Central tenant databases share company data. The reported condition is that a team deploys unversioned extensions to production and expects scheduled Business Central updates never to change dependent APIs; the more direct action is to track the platform release cycle and qualify extension versions against available compatibility signals.