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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 15

Question 140

A Power BI team has selected this approach: Transpose the appropriate rectangular table in Power Query after clarifying headers. The original business context is: An analyst has a table showing daily sales but needs a transposed matrix for a one-off interface. Which check would show that the solution meets its stated goal?

  1. The resulting table contains both historic and new event rows rather than horizontally joined fields.
  2. The resulting record count reflects one row per incident-severity pair.
  3. Every intended transaction matches the corresponding calendar date without time mismatches.
  4. Previous row labels become columns while values retain the intended alignment.

Explanation

Correct Answer

D:

Previous row labels become columns while values retain the intended alignment. It provides the required observation for the chosen implementation: Transpose the appropriate rectangular table in Power Query after clarifying headers. This test addresses the stated business constraint directly.

Incorrect Answers

A:

The resulting table contains both historic and new event rows rather than horizontally joined fields. That check would be meaningful for the separate case: A marketing analyst wants to keep all historic records while appending new daily records from a matching query. It would not directly verify this scenario's selected implementation: Transpose the appropriate rectangular table in Power Query after clarifying headers.

B:

The resulting record count reflects one row per incident-severity pair. That check would be meaningful for the separate case: An incident export contains 'critical, high, medium' in one cell and the analyst needs one incident-severity row per label. It would not directly verify this scenario's selected implementation: Transpose the appropriate rectangular table in Power Query after clarifying headers.

C:

Every intended transaction matches the corresponding calendar date without time mismatches. That check would be meaningful for the separate case: A semantic model's fact table uses date-time stamps but needs to relate to a day-grain Date dimension. It would not directly verify this scenario's selected implementation: Transpose the appropriate rectangular table in Power Query after clarifying headers.

Question 141

A seasonal store's regional CSV files use inconsistent case in their column headers. Which solution should the analyst prioritize for this scenario?

  1. Remove irrelevant columns before loading to reduce model size.
  2. Define a controlled schema normalization step before combining files.
  3. Normalize schema column names and types before an append operation.
  4. Unpivot the priority count columns to Priority and Count rows.

Explanation

Correct Answer

C:

Normalize schema column names and types before an append operation. This targets the specific requirement described for this Power BI scenario. The corresponding acceptance check is: All regions populate the same normalized columns without duplicate case-variant fields.

Incorrect Answers

A:

'Remove irrelevant columns before loading to reduce model size' is validated when 'Loaded tables omit unnecessary text while all required analytical fields remain'. It does not demonstrate 'All regions populate the same normalized columns without duplicate case-variant fields', which requires 'Normalize schema column names and types before an append operation'.

B:

A successful 'Define a controlled schema normalization step before combining files' would show 'Both old and new extracts populate the target columns and schema mismatches are flagged'. This case needs 'Normalize schema column names and types before an append operation' and evidence that 'All regions populate the same normalized columns without duplicate case-variant fields', not the other outcome.

D:

The check for 'Unpivot the priority count columns to Priority and Count rows' is 'A slicer can select one priority and filter its numeric count consistently'. That does not establish 'All regions populate the same normalized columns without duplicate case-variant fields'; the stated requirement calls for 'Normalize schema column names and types before an append operation'.

Question 142

A Power BI team has selected this approach: Normalize schema column names and types before an append operation. The original business context is: A seasonal store's regional CSV files use inconsistent case in their column headers. Which observed result would best confirm the change worked as intended?

  1. Loaded tables omit unnecessary text while all required analytical fields remain.
  2. A slicer can select one priority and filter its numeric count consistently.
  3. All regions populate the same normalized columns without duplicate case-variant fields.
  4. Both old and new extracts populate the target columns and schema mismatches are flagged.

Explanation

Correct Answer

C:

All regions populate the same normalized columns without duplicate case-variant fields. It provides the required observation for the chosen implementation: Normalize schema column names and types before an append operation. This test addresses the stated business constraint directly.

Incorrect Answers

A:

Loaded tables omit unnecessary text while all required analytical fields remain. That check would be meaningful for the separate case: A fact query includes columns for note text and debug payloads that reports never use. It would not directly verify this scenario's selected implementation: Normalize schema column names and types before an append operation.

B:

A slicer can select one priority and filter its numeric count consistently. That check would be meaningful for the separate case: A help desk export has ticket priorities distributed as columns rather than values, preventing a single priority slicer. It would not directly verify this scenario's selected implementation: Normalize schema column names and types before an append operation.

D:

Both old and new extracts populate the target columns and schema mismatches are flagged. That check would be meaningful for the separate case: A group of monthly extracts changes its file schema midway through the year. It would not directly verify this scenario's selected implementation: Normalize schema column names and types before an append operation.

Question 143

A table needs row numbers to help diagnose source ordering but the model's natural business keys must stay unchanged. What should the Power BI analyst configure to meet the stated need?

  1. Set a fixed decimal or decimal number type appropriate to monetary calculations.
  2. Add an index column for tracing while preserving business identifiers.
  3. Build a dimension with unique region keys and keep descriptive hierarchy attributes.
  4. Unpivot language-specific name fields into Language and ProductName rows.

Explanation

Correct Answer

B:

Add an index column for tracing while preserving business identifiers. This targets the specific requirement described for this Power BI scenario. The corresponding acceptance check is: The index is sequential in the chosen order and business-key uniqueness is unaffected.

Incorrect Answers

A:

'Set a fixed decimal or decimal number type appropriate to monetary calculations' addresses the mechanism measured by 'Sample values retain their required fractional precision after load'. The current outcome is 'The index is sequential in the chosen order and business-key uniqueness is unaffected' after 'Add an index column for tracing while preserving business identifiers', which the distractor leaves unverified.

C:

'The fact-to-region relationship uses one key and hierarchy labels do not cause key collisions' would demonstrate 'Build a dimension with unique region keys and keep descriptive hierarchy attributes', but not 'The index is sequential in the chosen order and business-key uniqueness is unaffected'. The latter requires 'Add an index column for tracing while preserving business identifiers' in this scenario.

D:

Using 'Unpivot language-specific name fields into Language and ProductName rows' supports the result 'The result supports language filtering without proliferating name columns'. It does not implement 'Add an index column for tracing while preserving business identifiers' or prove 'The index is sequential in the chosen order and business-key uniqueness is unaffected' for this question.

Question 144

A Power BI team has selected this approach: Add an index column for tracing while preserving business identifiers. The original business context is: A table needs row numbers to help diagnose source ordering but the model's natural business keys must stay unchanged. Which acceptance test best demonstrates the intended outcome?

  1. The fact-to-region relationship uses one key and hierarchy labels do not cause key collisions.
  2. The index is sequential in the chosen order and business-key uniqueness is unaffected.
  3. Sample values retain their required fractional precision after load.
  4. The result supports language filtering without proliferating name columns.

Explanation

Correct Answer

B:

The index is sequential in the chosen order and business-key uniqueness is unaffected. It provides the required observation for the chosen implementation: Add an index column for tracing while preserving business identifiers. This test addresses the stated business constraint directly.

Incorrect Answers

A:

The fact-to-region relationship uses one key and hierarchy labels do not cause key collisions. That check would be meaningful for the separate case: A product export includes region names with hierarchy levels in separate columns; the analyst needs a stable region key for joins. It would not directly verify this scenario's selected implementation: Add an index column for tracing while preserving business identifiers.

C:

Sample values retain their required fractional precision after load. That check would be meaningful for the separate case: A source's decimal sales amount is accidentally cast to Whole Number during import. It would not directly verify this scenario's selected implementation: Add an index column for tracing while preserving business identifiers.

D:

The result supports language filtering without proliferating name columns. That check would be meaningful for the separate case: A sales dimension table has two separate columns for English and German product names but a locale dimension is preferred. It would not directly verify this scenario's selected implementation: Add an index column for tracing while preserving business identifiers.

Question 145

An incident export contains 'critical, high, medium' in one cell and the analyst needs one incident-severity row per label. Which modeling or report-design decision most directly resolves this situation?

  1. Split the delimited list into rows rather than into new numbered columns.
  2. Convert the OrderDate column to the Date type in Power Query before load.
  3. Retain currency context and convert through a defined exchange-rate methodology before combined totals.
  4. Arrange base and referenced queries as an acyclic dependency chain.

Explanation

Correct Answer

A:

Split the delimited list into rows rather than into new numbered columns. This targets the specific requirement described for this Power BI scenario. The corresponding acceptance check is: The resulting record count reflects one row per incident-severity pair.

Incorrect Answers

B:

'Convert the OrderDate column to the Date type in Power Query before load' is validated when 'The date field behaves as a date and chronological filters use the intended days'. It does not demonstrate 'The resulting record count reflects one row per incident-severity pair', which requires 'Split the delimited list into rows rather than into new numbered columns'.

C:

A successful 'Retain currency context and convert through a defined exchange-rate methodology before combined totals' would show 'Reconciled totals use a common reporting currency and state the rate date'. This case needs 'Split the delimited list into rows rather than into new numbered columns' and evidence that 'The resulting record count reflects one row per incident-severity pair', not the other outcome.

D:

The check for 'Arrange base and referenced queries as an acyclic dependency chain' is 'The query-dependency view contains no cycles and all enabled outputs refresh'. That does not establish 'The resulting record count reflects one row per incident-severity pair'; the stated requirement calls for 'Split the delimited list into rows rather than into new numbered columns'.

Question 146

A Power BI team has selected this approach: Split the delimited list into rows rather than into new numbered columns. The original business context is: An incident export contains 'critical, high, medium' in one cell and the analyst needs one incident-severity row per label. What validation would be most relevant before accepting this change?

  1. The query-dependency view contains no cycles and all enabled outputs refresh.
  2. The date field behaves as a date and chronological filters use the intended days.
  3. The resulting record count reflects one row per incident-severity pair.
  4. Reconciled totals use a common reporting currency and state the rate date.

Explanation

Correct Answer

C:

The resulting record count reflects one row per incident-severity pair. It provides the required observation for the chosen implementation: Split the delimited list into rows rather than into new numbered columns. This test addresses the stated business constraint directly.

Incorrect Answers

A:

The query-dependency view contains no cycles and all enabled outputs refresh. That check would be meaningful for the separate case: A Power Query dataflow output is reused by many downstream queries but transformations must not create a circular reference. It would not directly verify this scenario's selected implementation: Split the delimited list into rows rather than into new numbered columns.

B:

The date field behaves as a date and chronological filters use the intended days. That check would be meaningful for the separate case: A source exports order dates as text but the model must support a date hierarchy and time intelligence. It would not directly verify this scenario's selected implementation: Split the delimited list into rows rather than into new numbered columns.

D:

Reconciled totals use a common reporting currency and state the rate date. That check would be meaningful for the separate case: An order table reports sales in different currencies and an analyst plans to sum raw amounts across currencies. It would not directly verify this scenario's selected implementation: Split the delimited list into rows rather than into new numbered columns.

Question 147

A group of monthly extracts changes its file schema midway through the year. Which solution should the analyst prioritize for this scenario?

  1. Use Append after validating matching columns, not Merge on customer ID.
  2. Unpivot the month columns into Month and Value fields.
  3. Disable load for the unnecessary duplicate or remove it after dependency review.
  4. Define a controlled schema normalization step before combining files.

Explanation

Correct Answer

D:

Define a controlled schema normalization step before combining files. This targets the specific requirement described for this Power BI scenario. The corresponding acceptance check is: Both old and new extracts populate the target columns and schema mismatches are flagged.

Incorrect Answers

A:

'Use Append after validating matching columns, not Merge on customer ID' addresses the mechanism measured by 'The resulting table contains both historic and new event rows rather than horizontally joined fields'. The current outcome is 'Both old and new extracts populate the target columns and schema mismatches are flagged' after 'Define a controlled schema normalization step before combining files', which the distractor leaves unverified.

B:

'The result has month-value rows rather than twelve separate month measures' would demonstrate 'Unpivot the month columns into Month and Value fields', but not 'Both old and new extracts populate the target columns and schema mismatches are flagged'. The latter requires 'Define a controlled schema normalization step before combining files' in this scenario.

C:

Using 'Disable load for the unnecessary duplicate or remove it after dependency review' supports the result 'Only the intended fact table loads and dependent queries still work'. It does not implement 'Define a controlled schema normalization step before combining files' or prove 'Both old and new extracts populate the target columns and schema mismatches are flagged' for this question.

Question 148

A Power BI team has selected this approach: Define a controlled schema normalization step before combining files. The original business context is: A group of monthly extracts changes its file schema midway through the year. Which observation best indicates the requirement was met?

  1. Both old and new extracts populate the target columns and schema mismatches are flagged.
  2. The resulting table contains both historic and new event rows rather than horizontally joined fields.
  3. The result has month-value rows rather than twelve separate month measures.
  4. Only the intended fact table loads and dependent queries still work.

Explanation

Correct Answer

A:

Both old and new extracts populate the target columns and schema mismatches are flagged. It provides the required observation for the chosen implementation: Define a controlled schema normalization step before combining files. This test addresses the stated business constraint directly.

Incorrect Answers

B:

The resulting table contains both historic and new event rows rather than horizontally joined fields. That check would be meaningful for the separate case: A marketing analyst wants to keep all historic records while appending new daily records from a matching query. It would not directly verify this scenario's selected implementation: Define a controlled schema normalization step before combining files.

C:

The result has month-value rows rather than twelve separate month measures. That check would be meaningful for the separate case: A wide quarterly table has one column per month but report designers need month as a slicer category. It would not directly verify this scenario's selected implementation: Define a controlled schema normalization step before combining files.

D:

Only the intended fact table loads and dependent queries still work. That check would be meaningful for the separate case: A query's duplicate stage adds no new rows but creates two loaded copies of a large fact table. It would not directly verify this scenario's selected implementation: Define a controlled schema normalization step before combining files.

Question 149

A sales dimension table has two separate columns for English and German product names but a locale dimension is preferred. What should the Power BI analyst configure to meet the stated need?

  1. Derive a normalized Date-only key from the timestamps for the relationship.
  2. Unpivot language-specific name fields into Language and ProductName rows.
  3. Pivot the attribute-name column using an appropriate value aggregation.
  4. Remove irrelevant columns before loading to reduce model size.

Explanation

Correct Answer

B:

Unpivot language-specific name fields into Language and ProductName rows. This targets the specific requirement described for this Power BI scenario. The corresponding acceptance check is: The result supports language filtering without proliferating name columns.

Incorrect Answers

A:

'Derive a normalized Date-only key from the timestamps for the relationship' is validated when 'Every intended transaction matches the corresponding calendar date without time mismatches'. It does not demonstrate 'The result supports language filtering without proliferating name columns', which requires 'Unpivot language-specific name fields into Language and ProductName rows'.

C:

A successful 'Pivot the attribute-name column using an appropriate value aggregation' would show 'The output contains the expected named attribute columns for each entity'. This case needs 'Unpivot language-specific name fields into Language and ProductName rows' and evidence that 'The result supports language filtering without proliferating name columns', not the other outcome.

D:

The check for 'Remove irrelevant columns before loading to reduce model size' is 'Loaded tables omit unnecessary text while all required analytical fields remain'. That does not establish 'The result supports language filtering without proliferating name columns'; the stated requirement calls for 'Unpivot language-specific name fields into Language and ProductName rows'.

Question 150

A Power BI team has selected this approach: Unpivot language-specific name fields into Language and ProductName rows. The original business context is: A sales dimension table has two separate columns for English and German product names but a locale dimension is preferred. What evidence most directly verifies that the requirement is satisfied?

  1. Loaded tables omit unnecessary text while all required analytical fields remain.
  2. The output contains the expected named attribute columns for each entity.
  3. Every intended transaction matches the corresponding calendar date without time mismatches.
  4. The result supports language filtering without proliferating name columns.

Explanation

Correct Answer

D:

The result supports language filtering without proliferating name columns. It provides the required observation for the chosen implementation: Unpivot language-specific name fields into Language and ProductName rows. This test addresses the stated business constraint directly.

Incorrect Answers

A:

Loaded tables omit unnecessary text while all required analytical fields remain. That check would be meaningful for the separate case: A fact query includes columns for note text and debug payloads that reports never use. It would not directly verify this scenario's selected implementation: Unpivot language-specific name fields into Language and ProductName rows.

B:

The output contains the expected named attribute columns for each entity. That check would be meaningful for the separate case: A key-value table lists attributes in rows but the model needs each attribute as a field. It would not directly verify this scenario's selected implementation: Unpivot language-specific name fields into Language and ProductName rows.

C:

Every intended transaction matches the corresponding calendar date without time mismatches. That check would be meaningful for the separate case: A semantic model's fact table uses date-time stamps but needs to relate to a day-grain Date dimension. It would not directly verify this scenario's selected implementation: Unpivot language-specific name fields into Language and ProductName rows.