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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 28

Question 270

A ranking should reset within each Region rather than across the entire enterprise. What must the RANKX table respect?

  1. Count rows of FILTER(Product, [Sales] above the threshold).
  2. Use TOPN with N=5 ordered by the Profit measure.
  3. Restrict the RANKX comparison table to products within the active Region.
  4. Use RANKX over the desired Product table with the Sales measure in descending order.

Explanation

Correct Answer

C:

Restrict the RANKX comparison table to products within the active Region. Ranking universe determines whether ranks are global or region-scoped.

Incorrect Answers

A:

A filter over dimension rows evaluates the criterion per product. That matters for “count of products with Sales above a threshold” rather than the condition “each Region rather than across the entire enterprise”.

B:

TOPN selects leading rows according to specified sort expressions. The boundary it addresses is “a table of the five most profitable products”, while this case concerns “each Region rather than across the entire enterprise”.

D:

RANKX compares values across a specified row set and returns ranks. The deciding difference is “amounts from highest to lowest within selected products” versus “each Region rather than across the entire enterprise”.

Question 271

A manager wants the mean UnitPrice for visible sales rows. Which DAX function works?

  1. Use COUNT on the numeric TestScore column.
  2. Use AVERAGE on the UnitPrice column under filter context.
  3. Use MIN on the DeliveryTime numeric column.
  4. Use STDEV.S for sample standard deviation when appropriate.

Explanation

Correct Answer

B:

Use AVERAGE on the UnitPrice column under filter context. AVERAGE returns arithmetic mean for nonblank numeric column values.

Incorrect Answers

A:

COUNT counts numeric nonblank cells, unlike COUNTROWS which counts table records. The deciding difference is “of nonblank entries in a numeric TestScore column” versus “wants the mean UnitPrice for visible sales rows”.

C:

Use MIN on the DeliveryTime numeric column. That is a different operating condition from “wants the mean UnitPrice for visible sales rows”: “needs the minimum nonblank DeliveryTime among visible records”.

D:

Sample standard deviation uses the sample estimator rather than population parameters. It serves “a standard deviation of a sampled numeric distribution”, not “wants the mean UnitPrice for visible sales rows”.

Question 272

A risk analyst wants the median transaction Amount, resilient to outliers. Which function fits?

  1. Use AVERAGE on the UnitPrice column under filter context.
  2. Use MIN on the DeliveryTime numeric column.
  3. Use MEDIAN on the numeric transaction Amount column.
  4. Use STDEV.S for sample standard deviation when appropriate.

Explanation

Correct Answer

C:

Use MEDIAN on the numeric transaction Amount column. MEDIAN chooses the middle value rather than arithmetic mean.

Incorrect Answers

A:

AVERAGE returns arithmetic mean for nonblank numeric column values. It serves “wants the mean UnitPrice for visible sales rows”, not “wants the median transaction Amount, resilient to outliers”.

B:

Use MIN on the DeliveryTime numeric column. The present requirement is “wants the median transaction Amount, resilient to outliers”; “needs the minimum nonblank DeliveryTime among visible records” is a distinct situation.

D:

Sample standard deviation uses the sample estimator rather than population parameters. The boundary it addresses is “a standard deviation of a sampled numeric distribution”, while this case concerns “wants the median transaction Amount, resilient to outliers”.

Question 273

A report must return a standard deviation of a sampled numeric distribution. Which function family fits?

  1. Use AVERAGE on the UnitPrice column under filter context.
  2. Use COUNT on the numeric TestScore column.
  3. Use MEDIAN on the numeric transaction Amount column.
  4. Use STDEV.S for sample standard deviation when appropriate.

Explanation

Correct Answer

D:

Use STDEV.S for sample standard deviation when appropriate. Sample standard deviation uses the sample estimator rather than population parameters.

Incorrect Answers

A:

AVERAGE returns arithmetic mean for nonblank numeric column values. The boundary it addresses is “wants the mean UnitPrice for visible sales rows”, while this case concerns “a standard deviation of a sampled numeric distribution”.

B:

COUNT counts numeric nonblank cells, unlike COUNTROWS which counts table records. This solves “of nonblank entries in a numeric TestScore column”; the stated issue is “a standard deviation of a sampled numeric distribution”.

C:

MEDIAN chooses the middle value rather than arithmetic mean. The deciding difference is “wants the median transaction Amount, resilient to outliers” versus “a standard deviation of a sampled numeric distribution”.

Question 274

A scorecard needs the minimum nonblank DeliveryTime among visible records. Which function fits?

  1. Use MIN on the DeliveryTime numeric column.
  2. Use AVERAGE on the UnitPrice column under filter context.
  3. Use MEDIAN on the numeric transaction Amount column.
  4. Use COUNT on the numeric TestScore column.

Explanation

Correct Answer

A:

Use MIN on the DeliveryTime numeric column. MIN returns the smallest visible nonblank value.

Incorrect Answers

B:

AVERAGE returns arithmetic mean for nonblank numeric column values. That is a different operating condition from “needs the minimum nonblank DeliveryTime among visible records”: “wants the mean UnitPrice for visible sales rows”.

C:

MEDIAN chooses the middle value rather than arithmetic mean. It serves “wants the median transaction Amount, resilient to outliers”, not “needs the minimum nonblank DeliveryTime among visible records”.

D:

COUNT counts numeric nonblank cells, unlike COUNTROWS which counts table records. The present requirement is “needs the minimum nonblank DeliveryTime among visible records”; “of nonblank entries in a numeric TestScore column” is a distinct situation.

Question 275

A quality manager wants the number of nonblank entries in a numeric TestScore column. Which function fits?

  1. Use STDEV.S for sample standard deviation when appropriate.
  2. Use AVERAGE on the UnitPrice column under filter context.
  3. Use MEDIAN on the numeric transaction Amount column.
  4. Use COUNT on the numeric TestScore column.

Explanation

Correct Answer

D:

Use COUNT on the numeric TestScore column. COUNT counts numeric nonblank cells, unlike COUNTROWS which counts table records.

Incorrect Answers

A:

Sample standard deviation uses the sample estimator rather than population parameters. The present requirement is “of nonblank entries in a numeric TestScore column”; “a standard deviation of a sampled numeric distribution” is a distinct situation.

B:

AVERAGE returns arithmetic mean for nonblank numeric column values. That matters for “wants the mean UnitPrice for visible sales rows” rather than the condition “of nonblank entries in a numeric TestScore column”.

C:

MEDIAN chooses the middle value rather than arithmetic mean. The boundary it addresses is “wants the median transaction Amount, resilient to outliers”, while this case concerns “of nonblank entries in a numeric TestScore column”.

Question 276

A model repeats identical YTD, QTD and prior-year logic across dozens of base measures. What feature reduces duplication?

  1. Treat calculation groups as measure transformations rather than relationship substitutes.
  2. Use SELECTEDMEASURE within a calculation item.
  3. Create a calculation group with reusable time-intelligence calculation items.
  4. Define calculation-item format string expressions with appropriate measure handling.

Explanation

Correct Answer

C:

Create a calculation group with reusable time-intelligence calculation items. Calculation groups apply transformations to selected measures without multiplying explicit measures.

Incorrect Answers

A:

A calculation group modifies measure evaluation, not physical table join paths. This solves “an unrelated transaction table like a physical relationship”; the stated issue is “and prior-year logic across dozens of base measures”.

B:

SELECTEDMEASURE refers to the measure affected by the calculation group. The deciding difference is “retrieve whichever measure a visual is currently evaluating” versus “and prior-year logic across dozens of base measures”.

D:

Dynamic format strings can retain numeric values while adjusting display. That is a different operating condition from “and prior-year logic across dozens of base measures”: “monetary measure as currency and ratios as percent”.

Question 277

A calculation item must retrieve whichever measure a visual is currently evaluating. Which DAX function fits?

  1. Review calculation-group precedence to control evaluation order.
  2. Treat calculation groups as measure transformations rather than relationship substitutes.
  3. Create a calculation group with reusable time-intelligence calculation items.
  4. Use SELECTEDMEASURE within a calculation item.

Explanation

Correct Answer

D:

Use SELECTEDMEASURE within a calculation item. SELECTEDMEASURE refers to the measure affected by the calculation group.

Incorrect Answers

A:

Precedence affects how calculation-item transformations nest when multiple groups apply. That is a different operating condition from “retrieve whichever measure a visual is currently evaluating”: “and their transformations run in an unexpected sequence”.

B:

A calculation group modifies measure evaluation, not physical table join paths. It serves “an unrelated transaction table like a physical relationship”, not “retrieve whichever measure a visual is currently evaluating”.

C:

Calculation groups apply transformations to selected measures without multiplying explicit measures. The present requirement is “retrieve whichever measure a visual is currently evaluating”; “and prior-year logic across dozens of base measures” is a distinct situation.

Question 278

A model uses calculation items to format a monetary measure as currency and ratios as percent. What should be considered?

  1. Define calculation-item format string expressions with appropriate measure handling.
  2. Treat calculation groups as measure transformations rather than relationship substitutes.
  3. Review calculation-group precedence to control evaluation order.
  4. Create a calculation group with reusable time-intelligence calculation items.

Explanation

Correct Answer

A:

Define calculation-item format string expressions with appropriate measure handling. Dynamic format strings can retain numeric values while adjusting display.

Incorrect Answers

B:

A calculation group modifies measure evaluation, not physical table join paths. The boundary it addresses is “an unrelated transaction table like a physical relationship”, while this case concerns “monetary measure as currency and ratios as percent”.

C:

Precedence affects how calculation-item transformations nest when multiple groups apply. This solves “and their transformations run in an unexpected sequence”; the stated issue is “monetary measure as currency and ratios as percent”.

D:

Calculation groups apply transformations to selected measures without multiplying explicit measures. The deciding difference is “and prior-year logic across dozens of base measures” versus “monetary measure as currency and ratios as percent”.

Question 279

A modeller adds a calculation group and expects it to filter an unrelated transaction table like a physical relationship. What clarification fits?

  1. Treat calculation groups as measure transformations rather than relationship substitutes.
  2. Create a calculation group with reusable time-intelligence calculation items.
  3. Use SELECTEDMEASURE within a calculation item.
  4. Review calculation-group precedence to control evaluation order.

Explanation

Correct Answer

A:

Treat calculation groups as measure transformations rather than relationship substitutes. A calculation group modifies measure evaluation, not physical table join paths.

Incorrect Answers

B:

Calculation groups apply transformations to selected measures without multiplying explicit measures. Its application is “and prior-year logic across dozens of base measures”, not the need “an unrelated transaction table like a physical relationship”.

C:

SELECTEDMEASURE refers to the measure affected by the calculation group. That is a different operating condition from “an unrelated transaction table like a physical relationship”: “retrieve whichever measure a visual is currently evaluating”.

D:

Precedence affects how calculation-item transformations nest when multiple groups apply. It serves “and their transformations run in an unexpected sequence”, not “an unrelated transaction table like a physical relationship”.

Question 280

Two calculation groups interact and their transformations run in an unexpected sequence. What setting matters?

  1. Treat calculation groups as measure transformations rather than relationship substitutes.
  2. Create a calculation group with reusable time-intelligence calculation items.
  3. Define calculation-item format string expressions with appropriate measure handling.
  4. Review calculation-group precedence to control evaluation order.

Explanation

Correct Answer

D:

Review calculation-group precedence to control evaluation order. Precedence affects how calculation-item transformations nest when multiple groups apply.

Incorrect Answers

A:

A calculation group modifies measure evaluation, not physical table join paths. It serves “an unrelated transaction table like a physical relationship”, not “and their transformations run in an unexpected sequence”.

B:

Calculation groups apply transformations to selected measures without multiplying explicit measures. The present requirement is “and their transformations run in an unexpected sequence”; “and prior-year logic across dozens of base measures” is a distinct situation.

C:

Dynamic format strings can retain numeric values while adjusting display. That matters for “monetary measure as currency and ratios as percent” rather than the condition “and their transformations run in an unexpected sequence”.