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Microsoft PL-300 Practice Test 20

Question 190

A company stores Product, Category, and Brand repeated across every order line. A colleague proposes: Create three independent fact tables from each repeated descriptive column. Which explanation BEST identifies the defect in that proposal?

  1. Multiple unrelated facts are not a coherent product dimension
  2. A join may duplicate or drop rows instead of adding region transactions
  3. Fact/dimension separation supports a star schema and avoids redundant attributes
  4. The suggested approach is safe merely because its product name is familiar.

Explanation

Correct Answer

A:

Multiple unrelated facts are not a coherent product dimension. This directly explains why the proposal 'Create three independent fact tables from each repeated descriptive column' should not be used.

Incorrect Answers

B:

This addresses a different case: An analyst combines two tables that have the same columns but distinct store-region rows. It is not the specific defect in 'Create three independent fact tables from each repeated descriptive column'.

C:

This is reasoning supporting the preferred solution 'Create a Product dimension and keep ProductKey in the Sales fact', but it does not directly name the defect in the proposed shortcut.

D:

Product familiarity is not evidence of suitability. The actual defect in this proposal is: Multiple unrelated facts are not a coherent product dimension.

Question 191

A company stores Product, Category, and Brand repeated across every order line. After implementing Create a Product dimension and keep ProductKey in the Sales fact, which observation BEST demonstrates that the intended result is actually working?

  1. Output row count is the sum of the valid input rows
  2. The report owner approves Create a Product dimension and keep ProductKey in the Sales fact without testing the resulting behavior.
  3. The team schedules a future check of whether Sales relates many-to-one to a unique Product dimension, but has not observed a result.
  4. Sales relates many-to-one to a unique Product dimension

Explanation

Correct Answer

D:

The observation 'Sales relates many-to-one to a unique Product dimension' directly tests the intended result. Fact/dimension separation supports a star schema and avoids redundant attributes.

Incorrect Answers

A:

This belongs to a different case: An analyst combines two tables that have the same columns but distinct store-region rows. It does not validate the current change. In the current question, this comparison is made against: A company stores Product, Category, and Brand repeated across every order line. After implementing Create a Product dimension and keep ProductKey in the Sales fact, which observation BEST demonstrates that the intended result is actually working?

B:

Approval of a proposed design is not evidence of working behavior. The required observation is: Sales relates many-to-one to a unique Product dimension.

C:

A future test is not yet observed operational evidence. The verification must establish: Sales relates many-to-one to a unique Product dimension.

Question 192

The original scenario was: A company stores Product, Category, and Brand repeated across every order line. The initial solution is already in place. Now this new requirement arises: An order line can contain a configurable product bundle. Which ADDITIONAL action BEST meets the changed condition?

  1. Create three independent fact tables from each repeated descriptive column
  2. Introduce a separate component bridge at the correct bundle grain
  3. Sales relates many-to-one to a unique Product dimension
  4. Create a Product dimension and keep ProductKey in the Sales fact

Explanation

Correct Answer

B:

The changed requirement is 'An order line can contain a configurable product bundle'. The additional response is 'Introduce a separate component bridge at the correct bundle grain'.

Incorrect Answers

A:

This remains unsuitable for the original situation: Multiple unrelated facts are not a coherent product dimension. It also does not meet the changed need.

C:

This observes the original approach but is not an additional action: Sales relates many-to-one to a unique Product dimension.

D:

This is the already implemented original solution: Create a Product dimension and keep ProductKey in the Sales fact. Fact/dimension separation supports a star schema and avoids redundant attributes. It does not itself solve the new requirement.

Question 193

A survey has row labels for questions and one column per respondent, and an analyst wants them as proper records. Which approach BEST meets the stated Microsoft Power BI requirement?

  1. Create a measure before restructuring incorrectly oriented rows
  2. Transpose the table when source orientation is reversed, then promote headers appropriately
  3. Unpivot repeated columns after the orientation is fixed
  4. Add a Power Query custom column for Quantity multiplied by UnitPrice

Explanation

Correct Answer

B:

Transpose swaps rows and columns, which can correct a reversed input orientation. For the stated case, Transpose the table when source orientation is reversed, then promote headers appropriately.

Incorrect Answers

A:

A measure cannot fix the source table orientation. The proposed shortcut 'Create a measure before restructuring incorrectly oriented rows' fails the documented need.

C:

This might be appropriate after a different requirement arises: A repeated attribute later appears as several columns in the new layout. It is not the best initial response to the stated case.

D:

This addresses a separate source situation: An M query must create NetAmount by multiplying two imported numeric columns. It does not directly satisfy this case's priority.

Question 194

A survey has row labels for questions and one column per respondent, and an analyst wants them as proper records. A colleague proposes: Create a measure before restructuring incorrectly oriented rows. Which explanation BEST identifies the defect in that proposal?

  1. The suggested approach is safe merely because its product name is familiar.
  2. A measure cannot fix the source table orientation
  3. Transpose swaps rows and columns, which can correct a reversed input orientation
  4. Appending rows performs no per-row multiplication

Explanation

Correct Answer

B:

A measure cannot fix the source table orientation. This directly explains why the proposal 'Create a measure before restructuring incorrectly oriented rows' should not be used.

Incorrect Answers

A:

Product familiarity is not evidence of suitability. The actual defect in this proposal is: A measure cannot fix the source table orientation.

C:

This is reasoning supporting the preferred solution 'Transpose the table when source orientation is reversed, then promote headers appropriately', but it does not directly name the defect in the proposed shortcut.

D:

This addresses a different case: An M query must create NetAmount by multiplying two imported numeric columns. It is not the specific defect in 'Create a measure before restructuring incorrectly oriented rows'.

Question 195

A survey has row labels for questions and one column per respondent, and an analyst wants them as proper records. After implementing Transpose the table when source orientation is reversed, then promote headers appropriately, which observation BEST demonstrates that the intended result is actually working?

  1. NetAmount matches known row samples and is numeric
  2. The team schedules a future check of whether Question and respondent fields appear in the intended tabular form, but has not observed a result.
  3. Question and respondent fields appear in the intended tabular form
  4. The report owner approves Transpose the table when source orientation is reversed, then promote headers appropriately without testing the resulting behavior.

Explanation

Correct Answer

C:

The observation 'Question and respondent fields appear in the intended tabular form' directly tests the intended result. Transpose swaps rows and columns, which can correct a reversed input orientation.

Incorrect Answers

A:

This belongs to a different case: An M query must create NetAmount by multiplying two imported numeric columns. It does not validate the current change.

B:

A future test is not yet observed operational evidence. The verification must establish: Question and respondent fields appear in the intended tabular form.

D:

Approval of a proposed design is not evidence of working behavior. The required observation is: Question and respondent fields appear in the intended tabular form.

Question 196

The original scenario was: A survey has row labels for questions and one column per respondent, and an analyst wants them as proper records. The initial solution is already in place. Now this new requirement arises: A repeated attribute later appears as several columns in the new layout. Which ADDITIONAL action BEST meets the changed condition?

  1. Create a measure before restructuring incorrectly oriented rows
  2. Question and respondent fields appear in the intended tabular form
  3. Transpose the table when source orientation is reversed, then promote headers appropriately
  4. Unpivot repeated columns after the orientation is fixed

Explanation

Correct Answer

D:

The changed requirement is 'A repeated attribute later appears as several columns in the new layout'. The additional response is 'Unpivot repeated columns after the orientation is fixed'.

Incorrect Answers

A:

This remains unsuitable for the original situation: A measure cannot fix the source table orientation. It also does not meet the changed need.

B:

This observes the original approach but is not an additional action: Question and respondent fields appear in the intended tabular form.

C:

This is the already implemented original solution: Transpose the table when source orientation is reversed, then promote headers appropriately. Transpose swaps rows and columns, which can correct a reversed input orientation. It does not itself solve the new requirement.

Question 197

A product list needs an IsPremium text flag based on Price greater than 500. The original need and a later change are both under review: Price thresholds become region-specific instead of globally fixed. Which THREE entries together specify the initial action, direct evidence it works, and an additional action for the changed need? (Select THREE.)

  1. Add a conditional column implementing the accepted price rule
  2. Configure a sort order and expect it to add the IsPremium value
  3. Merge a threshold lookup table before evaluating the conditional rule
  4. Unpivot Status when Status is already stored as the desired attribute
  5. Group or pivot status values into columns with an appropriate aggregation
  6. Rows over 500 are marked premium and other rows follow the rule

Explanation

Correct Answers

A:

Conditional columns derive attributes from explicit row-level tests. For the stated case, Add a conditional column implementing the accepted price rule.

C:

Correct additional action for the explicitly stated later requirement. When Price thresholds become region-specific instead of globally fixed, use this response: Merge a threshold lookup table before evaluating the conditional rule.

F:

Correct direct operational evidence. Rows over 500 are marked premium and other rows follow the rule. This is a check of the original requirement, not an unperformed plan.

Incorrect Answers

B:

Sorting changes display order rather than creating rule-based flags. The proposed shortcut 'Configure a sort order and expect it to add the IsPremium value' fails the documented need.

D:

This is an unsuitable alternative for a different situation: A support log has one row per IncidentID and Status, and auditors need one column per status with counts. It does not establish the requested action, evidence, or follow-up.

E:

This addresses a separate source situation: A support log has one row per IncidentID and Status, and auditors need one column per status with counts. It does not directly satisfy this case's priority.

Question 198

A product list needs an IsPremium text flag based on Price greater than 500. A colleague proposes: Configure a sort order and expect it to add the IsPremium value. Which explanation BEST identifies the defect in that proposal?

  1. Conditional columns derive attributes from explicit row-level tests
  2. Sorting changes display order rather than creating rule-based flags
  3. The suggested approach is safe merely because its product name is familiar.
  4. Unpivoting an existing attribute cannot create the required cross-tab

Explanation

Correct Answer

B:

Sorting changes display order rather than creating rule-based flags. This directly explains why the proposal 'Configure a sort order and expect it to add the IsPremium value' should not be used.

Incorrect Answers

A:

This is reasoning supporting the preferred solution 'Add a conditional column implementing the accepted price rule', 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: Sorting changes display order rather than creating rule-based flags.

D:

This addresses a different case: A support log has one row per IncidentID and Status, and auditors need one column per status with counts. It is not the specific defect in 'Configure a sort order and expect it to add the IsPremium value'.

Question 199

A product list needs an IsPremium text flag based on Price greater than 500. After implementing Add a conditional column implementing the accepted price rule, which observation BEST demonstrates that the intended result is actually working?

  1. The team schedules a future check of whether Rows over 500 are marked premium and other rows follow the rule, but has not observed a result.
  2. The report owner approves Add a conditional column implementing the accepted price rule without testing the resulting behavior.
  3. The result shows a separate status count for each IncidentID
  4. Rows over 500 are marked premium and other rows follow the rule

Explanation

Correct Answer

D:

The observation 'Rows over 500 are marked premium and other rows follow the rule' directly tests the intended result. Conditional columns derive attributes from explicit row-level tests.

Incorrect Answers

A:

A future test is not yet observed operational evidence. The verification must establish: Rows over 500 are marked premium and other rows follow the rule.

B:

Approval of a proposed design is not evidence of working behavior. The required observation is: Rows over 500 are marked premium and other rows follow the rule.

C:

This belongs to a different case: A support log has one row per IncidentID and Status, and auditors need one column per status with counts. It does not validate the current change.

Question 200

The original scenario was: A product list needs an IsPremium text flag based on Price greater than 500. The initial solution is already in place. Now this new requirement arises: Price thresholds become region-specific instead of globally fixed. Which ADDITIONAL action BEST meets the changed condition?

  1. Configure a sort order and expect it to add the IsPremium value
  2. Merge a threshold lookup table before evaluating the conditional rule
  3. Rows over 500 are marked premium and other rows follow the rule
  4. Add a conditional column implementing the accepted price rule

Explanation

Correct Answer

B:

The changed requirement is 'Price thresholds become region-specific instead of globally fixed'. The additional response is 'Merge a threshold lookup table before evaluating the conditional rule'.

Incorrect Answers

A:

This remains unsuitable for the original situation: Sorting changes display order rather than creating rule-based flags. It also does not meet the changed need.

C:

This observes the original approach but is not an additional action: Rows over 500 are marked premium and other rows follow the rule.

D:

This is the already implemented original solution: Add a conditional column implementing the accepted price rule. Conditional columns derive attributes from explicit row-level tests. It does not itself solve the new requirement.

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