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Microsoft PL-300 Bundle

Exam Code: PL-300

Exam Name Microsoft Power BI Data Analyst

Certification Provider: Microsoft

Corresponding Certification: Microsoft Certified: Power BI Data Analyst Associate

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Microsoft PL-300 Practice Test 5

Question 40

A cloud refresh fails because a renamed source column no longer matches Applied Steps. What is the likely fix?

  1. Revise the affected Power Query step that references the old column name.
  2. Verify source-level SELECT permission for the requested database object.
  3. Connect to the SharePoint source directly with its supported connector.
  4. Implement throttling/backoff within supported connector and API limits.

Explanation

Correct Answer

A:

Revise the affected Power Query step that references the old column name. A renamed source column no longer matches Applied Steps.

Incorrect Answers

B:

Successful sign-in does not guarantee permissions on every underlying table. The present requirement is “renamed source column no longer matches Applied Steps”; “reading a particular table” is a distinct situation.

C:

A cloud SharePoint connection avoids dependence on the author's local sync directory. That matters for “uses a path to a local synchronized copy” rather than the condition “renamed source column no longer matches Applied Steps”.

D:

Implement throttling/backoff within supported connector and API limits. The boundary it addresses is “HTTP 429 for repeated Power Query refresh requests”, while this case concerns “renamed source column no longer matches Applied Steps”.

Question 41

A large SQL dataset is filtered by date before loading; minimizing data transferred is critical. What should be checked?

  1. Confirm folding after a native query instead of assuming all downstream M steps fold.
  2. Use View Native Query or query folding indicators when supported.
  3. Reorder compatible filtering steps before the non-foldable transform.
  4. Verify the date filter folds to the SQL source.

Explanation

Correct Answer

D:

Verify the date filter folds to the SQL source. Query folding lets the database perform filtering before records are returned.

Incorrect Answers

A:

Native queries and connector capabilities can limit which later operations are foldable. The boundary it addresses is “the author expects every later transformation to fold”, while this case concerns “minimizing data transferred is critical”.

B:

Folding diagnostics reveal whether transformations are delegated to the source. This solves “runs at the database. Where should they look”; the stated issue is “minimizing data transferred is critical”.

C:

Early foldable filters can reduce rows before local processing. The deciding difference is “prevents subsequent filters from folding” versus “minimizing data transferred is critical”.

Question 42

An analyst adds a custom M transform that prevents subsequent filters from folding. What should be evaluated?

  1. Verify the date filter folds to the SQL source.
  2. Use View Native Query or query folding indicators when supported.
  3. Confirm folding after a native query instead of assuming all downstream M steps fold.
  4. Reorder compatible filtering steps before the non-foldable transform.

Explanation

Correct Answer

D:

Reorder compatible filtering steps before the non-foldable transform. Early foldable filters can reduce rows before local processing.

Incorrect Answers

A:

Query folding lets the database perform filtering before records are returned. Its application is “minimizing data transferred is critical”, not the need “prevents subsequent filters from folding”.

B:

Folding diagnostics reveal whether transformations are delegated to the source. That is a different operating condition from “prevents subsequent filters from folding”: “runs at the database. Where should they look”.

C:

Native queries and connector capabilities can limit which later operations are foldable. It serves “the author expects every later transformation to fold”, not “prevents subsequent filters from folding”.

Question 43

A relational source query uses a join that can be executed by the source system. Why does folding matter?

  1. Preserve compatible merge operations that the connector can translate to SQL joins.
  2. Reorder compatible filtering steps before the non-foldable transform.
  3. Verify the date filter folds to the SQL source.
  4. Confirm folding after a native query instead of assuming all downstream M steps fold.

Explanation

Correct Answer

A:

Preserve compatible merge operations that the connector can translate to SQL joins. Folded joins can shift expensive work to the source rather than the mashup engine.

Incorrect Answers

B:

Early foldable filters can reduce rows before local processing. That matters for “prevents subsequent filters from folding” rather than the condition “can be executed by the source system”.

C:

Query folding lets the database perform filtering before records are returned. The boundary it addresses is “minimizing data transferred is critical”, while this case concerns “can be executed by the source system”.

D:

Native queries and connector capabilities can limit which later operations are foldable. This solves “the author expects every later transformation to fold”; the stated issue is “can be executed by the source system”.

Question 44

A connector supports a native database query, but the author expects every later transformation to fold. What caution applies?

  1. Use View Native Query or query folding indicators when supported.
  2. Reorder compatible filtering steps before the non-foldable transform.
  3. Confirm folding after a native query instead of assuming all downstream M steps fold.
  4. Verify the date filter folds to the SQL source.

Explanation

Correct Answer

C:

Confirm folding after a native query instead of assuming all downstream M steps fold. Native queries and connector capabilities can limit which later operations are foldable.

Incorrect Answers

A:

Folding diagnostics reveal whether transformations are delegated to the source. This solves “runs at the database. Where should they look”; the stated issue is “the author expects every later transformation to fold”.

B:

Early foldable filters can reduce rows before local processing. The deciding difference is “prevents subsequent filters from folding” versus “the author expects every later transformation to fold”.

D:

Query folding lets the database perform filtering before records are returned. That is a different operating condition from “the author expects every later transformation to fold”: “minimizing data transferred is critical”.

Question 45

A reviewer wants to see whether an Applied Step runs at the database. Where should they look?

  1. Verify the date filter folds to the SQL source.
  2. Preserve compatible merge operations that the connector can translate to SQL joins.
  3. Confirm folding after a native query instead of assuming all downstream M steps fold.
  4. Use View Native Query or query folding indicators when supported.

Explanation

Correct Answer

D:

Use View Native Query or query folding indicators when supported. Folding diagnostics reveal whether transformations are delegated to the source.

Incorrect Answers

A:

Query folding lets the database perform filtering before records are returned. That is a different operating condition from “runs at the database. Where should they look”: “minimizing data transferred is critical”.

B:

Folded joins can shift expensive work to the source rather than the mashup engine. It serves “can be executed by the source system”, not “runs at the database. Where should they look”.

C:

Native queries and connector capabilities can limit which later operations are foldable. The present requirement is “runs at the database. Where should they look”; “the author expects every later transformation to fold” is a distinct situation.

Question 46

An analyst duplicates an established enterprise model into each report, producing conflicting metric definitions. What should change?

  1. Replace machine-specific paths with an approved stable shared source location.
  2. Select required columns before loading the semantic model.
  3. Reuse the centrally governed semantic model for thin reports.
  4. Keep the report connected to the maintained upstream semantic model.

Explanation

Correct Answer

C:

Reuse the centrally governed semantic model for thin reports. Shared models reduce duplicated measures and inconsistent business calculations.

Incorrect Answers

A:

Production refresh should not depend on one author's workstation. That matters for “breaks in the service” rather than the condition “model into each report, producing conflicting metric definitions”.

B:

Narrowing the model reduces memory and unnecessary processing. The boundary it addresses is “even though visuals use only five of them”, while this case concerns “model into each report, producing conflicting metric definitions”.

D:

Upstream updates are reused without rebuilding a separate semantic model copy. The deciding difference is “changes to a pre-existing published model's business measures” versus “model into each report, producing conflicting metric definitions”.

Question 47

A large report includes every raw source column even though visuals use only five of them. What is the better source-loading practice?

  1. Replace machine-specific paths with an approved stable shared source location.
  2. Keep the report connected to the maintained upstream semantic model.
  3. Select required columns before loading the semantic model.
  4. Reuse the centrally governed semantic model for thin reports.

Explanation

Correct Answer

C:

Select required columns before loading the semantic model. Narrowing the model reduces memory and unnecessary processing.

Incorrect Answers

A:

Production refresh should not depend on one author's workstation. The deciding difference is “breaks in the service” versus “even though visuals use only five of them”.

B:

Upstream updates are reused without rebuilding a separate semantic model copy. Its application is “changes to a pre-existing published model's business measures”, not the need “even though visuals use only five of them”.

D:

Shared models reduce duplicated measures and inconsistent business calculations. It serves “model into each report, producing conflicting metric definitions”, not “even though visuals use only five of them”.

Question 48

A Power Query refresh points to a changing local desktop path that breaks in the service. What should be improved?

  1. Select required columns before loading the semantic model.
  2. Replace machine-specific paths with an approved stable shared source location.
  3. Standardize common transformations and measures in a certified shared model.
  4. Reuse the centrally governed semantic model for thin reports.

Explanation

Correct Answer

B:

Replace machine-specific paths with an approved stable shared source location. Production refresh should not depend on one author's workstation.

Incorrect Answers

A:

Narrowing the model reduces memory and unnecessary processing. It serves “even though visuals use only five of them”, not “breaks in the service”.

C:

Standardize common transformations and measures in a certified shared model. That matters for “conflicting exchange-rate assumptions to the same executive workspace” rather than the condition “breaks in the service”.

D:

Shared models reduce duplicated measures and inconsistent business calculations. The boundary it addresses is “model into each report, producing conflicting metric definitions”, while this case concerns “breaks in the service”.

Question 49

Two datasets publish conflicting exchange-rate assumptions to the same executive workspace. Which governance approach helps?

  1. Reuse the centrally governed semantic model for thin reports.
  2. Replace machine-specific paths with an approved stable shared source location.
  3. Select required columns before loading the semantic model.
  4. Standardize common transformations and measures in a certified shared model.

Explanation

Correct Answer

D:

Standardize common transformations and measures in a certified shared model. Consistent semantic definitions prevent contradictory reports.

Incorrect Answers

A:

Shared models reduce duplicated measures and inconsistent business calculations. The boundary it addresses is “model into each report, producing conflicting metric definitions”, while this case concerns “conflicting exchange-rate assumptions to the same executive workspace”.

B:

Production refresh should not depend on one author's workstation. This solves “breaks in the service”; the stated issue is “conflicting exchange-rate assumptions to the same executive workspace”.

C:

Narrowing the model reduces memory and unnecessary processing. The deciding difference is “even though visuals use only five of them” versus “conflicting exchange-rate assumptions to the same executive workspace”.

Question 50

A service report must respect changes to a pre-existing published model's business measures. What design avoids a stale local fork?

  1. Keep the report connected to the maintained upstream semantic model.
  2. Replace machine-specific paths with an approved stable shared source location.
  3. Reuse the centrally governed semantic model for thin reports.
  4. Standardize common transformations and measures in a certified shared model.

Explanation

Correct Answer

A:

Keep the report connected to the maintained upstream semantic model. Upstream updates are reused without rebuilding a separate semantic model copy.

Incorrect Answers

B:

Production refresh should not depend on one author's workstation. That is a different operating condition from “changes to a pre-existing published model's business measures”: “breaks in the service”.

C:

Shared models reduce duplicated measures and inconsistent business calculations. It serves “model into each report, producing conflicting metric definitions”, not “changes to a pre-existing published model's business measures”.

D:

Standardize common transformations and measures in a certified shared model. The present requirement is “changes to a pre-existing published model's business measures”; “conflicting exchange-rate assumptions to the same executive workspace” is a distinct situation.