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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 30

Question 290

A calculated table must summarize Sales by Region and Year and return aggregate measures. Which DAX concept fits?

  1. Use KEEPFILTERS for the additional Date condition.
  2. Use REMOVEFILTERS(Product[Manufacturer]) rather than clearing Product entirely.
  3. Use DATESBETWEEN on the Date column with explicit bounds.
  4. Use a suitable SUMMARIZECOLUMNS table expression with group-by columns and measures.

Explanation

Correct Answer

D:

Use a suitable SUMMARIZECOLUMNS table expression with group-by columns and measures. SUMMARIZECOLUMNS constructs grouped result tables under the specified context.

Incorrect Answers

A:

KEEPFILTERS intersects the added filter with existing Date context. Its application is “extra minimum Date criterion without replacing same-column selections”, not the need “by Region and Year and return aggregate measures”.

B:

Column-scoped removal preserves other Product attributes in context. That is a different operating condition from “by Region and Year and return aggregate measures”: “Product filters except remove the Manufacturer field filter”.

C:

Use DATESBETWEEN on the Date column with explicit bounds. It serves “explicit table of dates between StartDate and EndDate”, not “by Region and Year and return aggregate measures”.

Question 291

A report author wants a generated percent-of-grand-total calculation as a starting point without writing DAX from scratch. What tool helps?

  1. Extend and validate the Date table's calendar range.
  2. Prefer a valid direct Boolean CALCULATE filter when possible.
  3. Use the Quick measure feature and inspect the generated DAX.
  4. Verify the needed relationship and row context before applying RELATED.

Explanation

Correct Answer

C:

Use the Quick measure feature and inspect the generated DAX. Quick measures generate patterns but still require validation of semantics.

Incorrect Answers

A:

The Date table does not cover transaction dates. The present requirement is “a starting point without writing DAX from scratch”; “the Date table does not cover transaction dates” is a distinct situation.

B:

FILTER iterates a large fact table when a simple equality filter would work. That matters for “a simple equality filter would work” rather than the condition “a starting point without writing DAX from scratch”.

D:

RELATED relies on a row context and a suitable many-to-one relationship path. This solves “RELATED without a usable row context or relationship”; the stated issue is “a starting point without writing DAX from scratch”.

Question 292

A measure returns the same grand total on every product row. Which common cause should be investigated?

  1. Prefer a valid direct Boolean CALCULATE filter when possible.
  2. Use the Quick measure feature and inspect the generated DAX.
  3. Verify the needed relationship and row context before applying RELATED.
  4. Check whether ALL or REMOVEFILTERS unintentionally removes Product filters.

Explanation

Correct Answer

D:

Check whether ALL or REMOVEFILTERS unintentionally removes Product filters. Overbroad filter removal can make every row show the same result.

Incorrect Answers

A:

FILTER iterates a large fact table when a simple equality filter would work. This solves “a simple equality filter would work”; the stated issue is “the same grand total on every product row”.

B:

Quick measures generate patterns but still require validation of semantics. The deciding difference is “a starting point without writing DAX from scratch” versus “the same grand total on every product row”.

C:

RELATED relies on a row context and a suitable many-to-one relationship path. Its application is “RELATED without a usable row context or relationship”, not the need “the same grand total on every product row”.

Question 293

A DAX measure uses RELATED without a usable row context or relationship. What should the author check?

  1. Extend and validate the Date table's calendar range.
  2. Verify the needed relationship and row context before applying RELATED.
  3. Prefer a valid direct Boolean CALCULATE filter when possible.
  4. Use the Quick measure feature and inspect the generated DAX.

Explanation

Correct Answer

B:

Verify the needed relationship and row context before applying RELATED. RELATED relies on a row context and a suitable many-to-one relationship path.

Incorrect Answers

A:

The Date table does not cover transaction dates. That is a different operating condition from “RELATED without a usable row context or relationship”: “the Date table does not cover transaction dates”.

C:

FILTER iterates a large fact table when a simple equality filter would work. The present requirement is “RELATED without a usable row context or relationship”; “a simple equality filter would work” is a distinct situation.

D:

Quick measures generate patterns but still require validation of semantics. That matters for “a starting point without writing DAX from scratch” rather than the condition “RELATED without a usable row context or relationship”.

Question 294

A time-intelligence result is blank because the Date table does not cover transaction dates. What correction fits?

  1. Verify the needed relationship and row context before applying RELATED.
  2. Use the Quick measure feature and inspect the generated DAX.
  3. Extend and validate the Date table's calendar range.
  4. Prefer a valid direct Boolean CALCULATE filter when possible.

Explanation

Correct Answer

C:

Extend and validate the Date table's calendar range. The Date table does not cover transaction dates.

Incorrect Answers

A:

RELATED relies on a row context and a suitable many-to-one relationship path. That matters for “RELATED without a usable row context or relationship” rather than the condition “the Date table does not cover transaction dates”.

B:

Quick measures generate patterns but still require validation of semantics. The boundary it addresses is “a starting point without writing DAX from scratch”, while this case concerns “the Date table does not cover transaction dates”.

D:

FILTER iterates a large fact table when a simple equality filter would work. The deciding difference is “a simple equality filter would work” versus “the Date table does not cover transaction dates”.

Question 295

A measure is slow because FILTER iterates a large fact table when a simple equality filter would work. What optimization helps?

  1. Verify the needed relationship and row context before applying RELATED.
  2. Use the Quick measure feature and inspect the generated DAX.
  3. Prefer a valid direct Boolean CALCULATE filter when possible.
  4. Check whether ALL or REMOVEFILTERS unintentionally removes Product filters.

Explanation

Correct Answer

C:

Prefer a valid direct Boolean CALCULATE filter when possible. FILTER iterates a large fact table when a simple equality filter would work.

Incorrect Answers

A:

RELATED relies on a row context and a suitable many-to-one relationship path. The deciding difference is “RELATED without a usable row context or relationship” versus “a simple equality filter would work”.

B:

Quick measures generate patterns but still require validation of semantics. Its application is “a starting point without writing DAX from scratch”, not the need “a simple equality filter would work”.

D:

Overbroad filter removal can make every row show the same result. It serves “the same grand total on every product row”, not “a simple equality filter would work”.

Question 296

A report page is slow and the author needs to identify which visual spends most time running a DAX query. What tool fits?

  1. Copy the visual query from Performance Analyzer into DAX query view for investigation.
  2. Use Performance Analyzer to inspect per-visual DAX query timings.
  3. Focus on visual display overhead rather than rewriting an already-fast DAX measure.
  4. Review page visual count, visibility and unnecessary interactive elements.

Explanation

Correct Answer

B:

Use Performance Analyzer to inspect per-visual DAX query timings. Performance Analyzer separates query, display and other visual time costs.

Incorrect Answers

A:

Executing the extracted query helps isolate model evaluation behavior. It serves “slow visual's DAX request outside the report canvas”, not “visual spends most time running a DAX query”.

C:

The bottleneck is presentation time, not semantic-model query execution. That matters for “a custom visual consumes most of its delay” rather than the condition “visual spends most time running a DAX query”.

D:

Simplifying excessive visuals can reduce report rendering work. The boundary it addresses is “still participating in page layout and performance checks”, while this case concerns “visual spends most time running a DAX query”.

Question 297

A query runs quickly but rendering a custom visual consumes most of its delay. What should be investigated?

  1. Review page visual count, visibility and unnecessary interactive elements.
  2. Benchmark comparable filter states and cache conditions before judging improvements.
  3. Focus on visual display overhead rather than rewriting an already-fast DAX measure.
  4. Use Performance Analyzer to inspect per-visual DAX query timings.

Explanation

Correct Answer

C:

Focus on visual display overhead rather than rewriting an already-fast DAX measure. The bottleneck is presentation time, not semantic-model query execution.

Incorrect Answers

A:

Simplifying excessive visuals can reduce report rendering work. The boundary it addresses is “still participating in page layout and performance checks”, while this case concerns “a custom visual consumes most of its delay”.

B:

Different cache and visual states can distort timing comparisons. This solves “uncached and cached runs without noting the difference”; the stated issue is “a custom visual consumes most of its delay”.

D:

Performance Analyzer separates query, display and other visual time costs. Its application is “visual spends most time running a DAX query”, not the need “a custom visual consumes most of its delay”.

Question 298

An analyst wants to reproduce a slow visual's DAX request outside the report canvas. What should be used?

  1. Use Performance Analyzer to inspect per-visual DAX query timings.
  2. Copy the visual query from Performance Analyzer into DAX query view for investigation.
  3. Review page visual count, visibility and unnecessary interactive elements.
  4. Benchmark comparable filter states and cache conditions before judging improvements.

Explanation

Correct Answer

B:

Copy the visual query from Performance Analyzer into DAX query view for investigation. Executing the extracted query helps isolate model evaluation behavior.

Incorrect Answers

A:

Performance Analyzer separates query, display and other visual time costs. Its application is “visual spends most time running a DAX query”, not the need “slow visual's DAX request outside the report canvas”.

C:

Simplifying excessive visuals can reduce report rendering work. It serves “still participating in page layout and performance checks”, not “slow visual's DAX request outside the report canvas”.

D:

Different cache and visual states can distort timing comparisons. The present requirement is “slow visual's DAX request outside the report canvas”; “uncached and cached runs without noting the difference” is a distinct situation.

Question 299

A report has dozens of hidden visuals still participating in page layout and performance checks. What should be inspected?

  1. Focus on visual display overhead rather than rewriting an already-fast DAX measure.
  2. Use Performance Analyzer to inspect per-visual DAX query timings.
  3. Copy the visual query from Performance Analyzer into DAX query view for investigation.
  4. Review page visual count, visibility and unnecessary interactive elements.

Explanation

Correct Answer

D:

Review page visual count, visibility and unnecessary interactive elements. Simplifying excessive visuals can reduce report rendering work.

Incorrect Answers

A:

The bottleneck is presentation time, not semantic-model query execution. The present requirement is “still participating in page layout and performance checks”; “a custom visual consumes most of its delay” is a distinct situation.

B:

Performance Analyzer separates query, display and other visual time costs. That matters for “visual spends most time running a DAX query” rather than the condition “still participating in page layout and performance checks”.

C:

Executing the extracted query helps isolate model evaluation behavior. The boundary it addresses is “slow visual's DAX request outside the report canvas”, while this case concerns “still participating in page layout and performance checks”.

Question 300

A developer measures performance after filters change but compares uncached and cached runs without noting the difference. What is prudent?

  1. Focus on visual display overhead rather than rewriting an already-fast DAX measure.
  2. Benchmark comparable filter states and cache conditions before judging improvements.
  3. Use Performance Analyzer to inspect per-visual DAX query timings.
  4. Copy the visual query from Performance Analyzer into DAX query view for investigation.

Explanation

Correct Answer

B:

Benchmark comparable filter states and cache conditions before judging improvements. Different cache and visual states can distort timing comparisons.

Incorrect Answers

A:

The bottleneck is presentation time, not semantic-model query execution. This solves “a custom visual consumes most of its delay”; the stated issue is “uncached and cached runs without noting the difference”.

C:

Performance Analyzer separates query, display and other visual time costs. Its application is “visual spends most time running a DAX query”, not the need “uncached and cached runs without noting the difference”.

D:

Executing the extracted query helps isolate model evaluation behavior. That is a different operating condition from “uncached and cached runs without noting the difference”: “slow visual's DAX request outside the report canvas”.