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Microsoft PL-300 Practice Test 32

Question 310

A margin percentage should display BLANK rather than crash when revenue is zero. A colleague proposes: Use [Profit] / [Revenue] and assume every customer has nonzero revenue. Which explanation BEST identifies the defect in that proposal?

  1. Calculated columns do not dynamically recalculate for every report selection
  2. Unprotected division can yield invalid or unexpected results for zero denominators
  3. The suggested approach is safe merely because its product name is familiar.
  4. DIVIDE handles zero and blank denominators more safely than plain division

Explanation

Correct Answer

B:

Unprotected division can yield invalid or unexpected results for zero denominators. This directly explains why the proposal 'Use [Profit] / [Revenue] and assume every customer has nonzero revenue' should not be used.

Incorrect Answers

A:

This addresses a different case: A business user wants a report measure that adapts to slicers, not a refresh-time snapshot stored on rows. It is not the specific defect in 'Use [Profit] / [Revenue] and assume every customer has nonzero revenue'.

C:

Product familiarity is not evidence of suitability. The actual defect in this proposal is: Unprotected division can yield invalid or unexpected results for zero denominators.

D:

This is reasoning supporting the preferred solution 'Use DIVIDE([Profit], [Revenue]) in the measure', but it does not directly name the defect in the proposed shortcut.

Question 311

A margin percentage should display BLANK rather than crash when revenue is zero. After implementing Use DIVIDE([Profit], [Revenue]) in the measure, which observation BEST demonstrates that the intended result is actually working?

  1. Zero-revenue rows show blank while ordinary margins calculate correctly
  2. The report owner approves Use DIVIDE([Profit], [Revenue]) in the measure without testing the resulting behavior.
  3. The team schedules a future check of whether Zero-revenue rows show blank while ordinary margins calculate correctly, but has not observed a result.
  4. The metric changes correctly when slicers change without a model refresh

Explanation

Correct Answer

A:

The observation 'Zero-revenue rows show blank while ordinary margins calculate correctly' directly tests the intended result. DIVIDE handles zero and blank denominators more safely than plain division.

Incorrect Answers

B:

Approval of a proposed design is not evidence of working behavior. The required observation is: Zero-revenue rows show blank while ordinary margins calculate correctly.

C:

A future test is not yet observed operational evidence. The verification must establish: Zero-revenue rows show blank while ordinary margins calculate correctly.

D:

This belongs to a different case: A business user wants a report measure that adapts to slicers, not a refresh-time snapshot stored on rows. It does not validate the current change.

Question 312

The original scenario was: A margin percentage should display BLANK rather than crash when revenue is zero. The initial solution is already in place. Now this new requirement arises: Finance wants zero instead of blank for missing revenue. Which ADDITIONAL action BEST meets the changed condition?

  1. Zero-revenue rows show blank while ordinary margins calculate correctly
  2. Supply 0 as DIVIDE's alternate result after business approval
  3. Use [Profit] / [Revenue] and assume every customer has nonzero revenue
  4. Use DIVIDE([Profit], [Revenue]) in the measure

Explanation

Correct Answer

B:

The changed requirement is 'Finance wants zero instead of blank for missing revenue'. The additional response is 'Supply 0 as DIVIDE's alternate result after business approval'.

Incorrect Answers

A:

This observes the original approach but is not an additional action: Zero-revenue rows show blank while ordinary margins calculate correctly.

C:

This remains unsuitable for the original situation: Unprotected division can yield invalid or unexpected results for zero denominators. It also does not meet the changed need.

D:

This is the already implemented original solution: Use DIVIDE([Profit], [Revenue]) in the measure. DIVIDE handles zero and blank denominators more safely than plain division. It does not itself solve the new requirement.

Question 313

Management wants revenue only for products in Category Bikes without deleting other sales from the model. Which approach BEST meets the stated Microsoft Power BI requirement?

  1. Filter the Sales table permanently to Bikes in Power Query for all reports
  2. Use KEEPFILTERS to intersect the category filter with existing filters
  3. Count distinct CustomerIDs from the filtered Sales fact
  4. Use CALCULATE([Sales Amount], Product[Category] = "Bikes")

Explanation

Correct Answer

D:

CALCULATE evaluates an expression in a modified filter context. For the stated case, Use CALCULATE([Sales Amount], Product[Category] = "Bikes").

Incorrect Answers

A:

Destructive source filtering removes other categories for unrelated reports. The proposed shortcut 'Filter the Sales table permanently to Bikes in Power Query for all reports' fails the documented need.

B:

This might be appropriate after a different requirement arises: An external slicer for a different product category must be respected rather than overwritten. It is not the best initial response to the stated case.

C:

This addresses a separate source situation: A customer metric should count customers who have at least one sale in the selected month. It does not directly satisfy this case's priority.

Question 314

Management wants revenue only for products in Category Bikes without deleting other sales from the model. A colleague proposes: Filter the Sales table permanently to Bikes in Power Query for all reports. Which explanation BEST identifies the defect in that proposal?

  1. Destructive source filtering removes other categories for unrelated reports
  2. CALCULATE evaluates an expression in a modified filter context
  3. The suggested approach is safe merely because its product name is familiar.
  4. Customers without purchases would inflate the active-buyer count

Explanation

Correct Answer

A:

Destructive source filtering removes other categories for unrelated reports. This directly explains why the proposal 'Filter the Sales table permanently to Bikes in Power Query for all reports' should not be used.

Incorrect Answers

B:

This is reasoning supporting the preferred solution 'Use CALCULATE([Sales Amount], Product[Category] = "Bikes")', but it does not directly name the defect in the proposed shortcut.

C:

Product familiarity is not evidence of suitability. The actual defect in this proposal is: Destructive source filtering removes other categories for unrelated reports.

D:

This addresses a different case: A customer metric should count customers who have at least one sale in the selected month. It is not the specific defect in 'Filter the Sales table permanently to Bikes in Power Query for all reports'.

Question 315

Management wants revenue only for products in Category Bikes without deleting other sales from the model. After implementing Use CALCULATE([Sales Amount], Product[Category] = "Bikes"), which observation BEST demonstrates that the intended result is actually working?

  1. The team schedules a future check of whether The Bikes measure returns only bike sales while the general measure remains unchanged, but has not observed a result.
  2. The Bikes measure returns only bike sales while the general measure remains unchanged
  3. The count agrees with the list of distinct purchasers in a sample month
  4. The report owner approves Use CALCULATE([Sales Amount], Product[Category] = "Bikes") without testing the resulting behavior.

Explanation

Correct Answer

B:

The observation 'The Bikes measure returns only bike sales while the general measure remains unchanged' directly tests the intended result. CALCULATE evaluates an expression in a modified filter context.

Incorrect Answers

A:

A future test is not yet observed operational evidence. The verification must establish: The Bikes measure returns only bike sales while the general measure remains unchanged.

C:

This belongs to a different case: A customer metric should count customers who have at least one sale in the selected month. It does not validate the current change.

D:

Approval of a proposed design is not evidence of working behavior. The required observation is: The Bikes measure returns only bike sales while the general measure remains unchanged.

Question 316

The original scenario was: Management wants revenue only for products in Category Bikes without deleting other sales from the model. The initial solution is already in place. Now this new requirement arises: An external slicer for a different product category must be respected rather than overwritten. Which ADDITIONAL action BEST meets the changed condition?

  1. The Bikes measure returns only bike sales while the general measure remains unchanged
  2. Use CALCULATE([Sales Amount], Product[Category] = "Bikes")
  3. Use KEEPFILTERS to intersect the category filter with existing filters
  4. Filter the Sales table permanently to Bikes in Power Query for all reports

Explanation

Correct Answer

C:

The changed requirement is 'An external slicer for a different product category must be respected rather than overwritten'. The additional response is 'Use KEEPFILTERS to intersect the category filter with existing filters'.

Incorrect Answers

A:

This observes the original approach but is not an additional action: The Bikes measure returns only bike sales while the general measure remains unchanged.

B:

This is the already implemented original solution: Use CALCULATE([Sales Amount], Product[Category] = "Bikes"). CALCULATE evaluates an expression in a modified filter context. It does not itself solve the new requirement.

D:

This remains unsuitable for the original situation: Destructive source filtering removes other categories for unrelated reports. It also does not meet the changed need.

Question 317

A calculation must add the condition Brand equals North without overriding an existing Brand slicer. Which TWO entries together identify the most appropriate initial action and direct observed evidence of its success? (Select TWO.)

  1. Use CALCULATE with KEEPFILTERS on the Brand condition
  2. Use RELATED(Product[StandardCost]) inside an iterator with a valid many-to-one relationship
  3. Apply CALCULATE Brand North and ignore the current Brand filter without review
  4. Use a deliberate filter override with clear labeling
  5. Selecting another brand with North yields no intersecting rows

Explanation

Correct Answers

A:

KEEPFILTERS intersects new filter arguments with existing context on the same columns. For the stated case, Use CALCULATE with KEEPFILTERS on the Brand condition.

E:

Correct direct operational evidence. Selecting another brand with North yields no intersecting rows. This is a check of the original requirement, not an unperformed plan.

Incorrect Answers

B:

This addresses a separate source situation: A measure in Sales needs each row's related Product StandardCost for a row-level extended-cost calculation. It does not directly satisfy this case's priority.

C:

The normal filter argument may replace an existing filter on the same column. The proposed shortcut 'Apply CALCULATE Brand North and ignore the current Brand filter without review' fails the documented need.

D:

This might be appropriate after a different requirement arises: The new requirement is an explicitly fixed North-brand KPI regardless of brand slicer. It is not the best initial response to the stated case.

Question 318

A calculation must add the condition Brand equals North without overriding an existing Brand slicer. A colleague proposes: Apply CALCULATE Brand North and ignore the current Brand filter without review. Which explanation BEST identifies the defect in that proposal?

  1. Lookup without a reliable key can return wrong or ambiguous values
  2. The suggested approach is safe merely because its product name is familiar.
  3. The normal filter argument may replace an existing filter on the same column
  4. KEEPFILTERS intersects new filter arguments with existing context on the same columns

Explanation

Correct Answer

C:

The normal filter argument may replace an existing filter on the same column. This directly explains why the proposal 'Apply CALCULATE Brand North and ignore the current Brand filter without review' should not be used.

Incorrect Answers

A:

This addresses a different case: A measure in Sales needs each row's related Product StandardCost for a row-level extended-cost calculation. It is not the specific defect in 'Apply CALCULATE Brand North and ignore the current Brand filter without review'.

B:

Product familiarity is not evidence of suitability. The actual defect in this proposal is: The normal filter argument may replace an existing filter on the same column.

D:

This is reasoning supporting the preferred solution 'Use CALCULATE with KEEPFILTERS on the Brand condition', but it does not directly name the defect in the proposed shortcut.

Question 319

A calculation must add the condition Brand equals North without overriding an existing Brand slicer. After implementing Use CALCULATE with KEEPFILTERS on the Brand condition, which observation BEST demonstrates that the intended result is actually working?

  1. The team schedules a future check of whether Selecting another brand with North yields no intersecting rows, but has not observed a result.
  2. The report owner approves Use CALCULATE with KEEPFILTERS on the Brand condition without testing the resulting behavior.
  3. Selecting another brand with North yields no intersecting rows
  4. Extended cost matches the related product cost on sampled sale lines

Explanation

Correct Answer

C:

The observation 'Selecting another brand with North yields no intersecting rows' directly tests the intended result. KEEPFILTERS intersects new filter arguments with existing context on the same columns.

Incorrect Answers

A:

A future test is not yet observed operational evidence. The verification must establish: Selecting another brand with North yields no intersecting rows.

B:

Approval of a proposed design is not evidence of working behavior. The required observation is: Selecting another brand with North yields no intersecting rows.

D:

This belongs to a different case: A measure in Sales needs each row's related Product StandardCost for a row-level extended-cost calculation. It does not validate the current change.

Question 320

The original scenario was: A calculation must add the condition Brand equals North without overriding an existing Brand slicer. The initial solution is already in place. Now this new requirement arises: The new requirement is an explicitly fixed North-brand KPI regardless of brand slicer. Which ADDITIONAL action BEST meets the changed condition?

  1. Selecting another brand with North yields no intersecting rows
  2. Apply CALCULATE Brand North and ignore the current Brand filter without review
  3. Use a deliberate filter override with clear labeling
  4. Use CALCULATE with KEEPFILTERS on the Brand condition

Explanation

Correct Answer

C:

The changed requirement is 'The new requirement is an explicitly fixed North-brand KPI regardless of brand slicer'. The additional response is 'Use a deliberate filter override with clear labeling'.

Incorrect Answers

A:

This observes the original approach but is not an additional action: Selecting another brand with North yields no intersecting rows.

B:

This remains unsuitable for the original situation: The normal filter argument may replace an existing filter on the same column. It also does not meet the changed need.

D:

This is the already implemented original solution: Use CALCULATE with KEEPFILTERS on the Brand condition. KEEPFILTERS intersects new filter arguments with existing context on the same columns. It does not itself solve the new requirement.

Microsoft Power BI Data Analyst (PL-300) Practice Tests