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Microsoft PL-300試験は、データアナリストがパワーBIのスキルと知識を検証するのに最適な方法です。この試験では、データモデルを作成および管理し、データを視覚化し、レポートとダッシュボードを作成する機能を検証します。試験に合格することにより、個人はPower BIを使用してビジネス上の問題を解決し、データ駆動型の決定を下す習熟度を示すことができます。

Microsoft Power BI Data Analyst 認定 PL-300 試験問題 (Q177-Q182):

質問 # 177
You have the Power BI data model shown in the following exhibit.

正解：

解説：

Explanation:
The retained answer-area mapping contains the correct selections. Begin with the scenario statement that you have the power bi data model shown in the following exhibit. The opposite cardinality or unnecessary bidirectional filtering can duplicate results, block propagation, or create ambiguity rather than solve the stated model path. The relationship must carry filters from the descriptive table to the transaction table through matching keys. Bidirectional filtering is reserved for a demonstrated need because it can introduce multiple active paths. In Microsoft ' s current exam outline, the corresponding objective is " Define a relationship ' s cardinality and cross-filter direction " . It also preserves predictable filter context and aggregation behavior when the result is used by several visuals or report pages.
Microsoft Learn reference: https://learn.microsoft.com/en-us/power-bi/transform-model/desktop- relationships-understand | PL-300 objective: " Define a relationship ' s cardinality and cross-filter direction "
| Study guide: https://learn.microsoft.com/en-us/credentials/certifications/resources/study-guides/pl-300

質問 # 178
In Power BI Desktop, you are building a sales report that contains two tables. Both tables have row-level security (RLS) configured.
You need to create a relationship between the tables. The solution must ensure that bidirectional cross- filtering honors the RLS settings.
What should you do?

A. Create an active relationship between the tables and select Assume referential integrity.
B. Create an inactive relationship between the tables and select Apply security filter in both directions.
C. Create an active relationship between the tables and select Apply security filter in both directions.
D. Create an inactive relationship between the tables and select Assume referential integrity.

正解：C

解説：

The correct answer is D (Create an active relationship between the tables and select Apply security filter in both directions). Security roles determine which rows a viewer can query. If a user belongs to more than one role, the allowed sets are additive, so role design must account for the resulting union of visible rows. The deciding requirement in this question is to create a relationship between the tables. The solution must ensure that bidirectional cross-filtering honors the RLS settings. Report filters and hidden visuals are not security controls because users can still query rows available to the semantic model. For exam alignment, this is assessed under " Implement row-level security roles " in the current study guide.
Microsoft Learn reference: https://learn.microsoft.com/en-us/power-bi/guidance/rls-guidance | PL-300 objective: " Implement row-level security roles " | Study guide: https://learn.microsoft.com/en-us/credentials
/certifications/resources/study-guides/pl-300

質問 # 179
You have a query named Customer that imports CSV files from a data lake. The query contains 500 rows as shown in the exhibit. (Click the Exhibit tab.)

Each file contains deltas of any new or modified rows from each load to the data lake. Multiple files can have the same customer ID.
You need to keep only the last modified row for each customer ID.
Which three actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.

正解：

解説：

Explanation
1) Duplicate Customer query
2) Group by CustId by Max ModifiedDate (only 2 columns to keep)
3) Merge two queries on CustId and ModifiedDate inner join (to retreive other customer informations related to latest Date)

質問 # 180
You have a prospective customer list that contains 1,500 rows of data. The list contains the following fields:
First name
Last name
Email address
State/Region
Phone number
You import the list into Power Query Editor.
You need to ensure that the list contains records for each State/Region to which you want to target a marketing campaign.
Which two actions should you perform? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.

A. Open the Advanced Editor.
B. Enable Column profiling based on entire semantic model.
C. Select Column profile.
D. Select Column distribution.
E. Select Column quality.

正解：B、C

解説：
Choose C (Enable Column profiling based on entire semantic model); E (Select Column profile). Column profile and column distribution expose value frequency, distinct and unique counts, errors, empty values, and statistics for the selected field. Those diagnostics answer a data-quality question without changing the source values. What determines the answer is the need to ensure that the list contains records for each State/Region to which you want to target a marketing campaign. A transformation that replaces, removes, or filters values would change the data before the analyst has quantified the problem; profiling is the diagnostic step. For exam alignment, this is assessed under " Convert semi-structured data to a table " in the current study guide.
Microsoft Learn reference: https://learn.microsoft.com/en-us/power-query/data-profiling-tools | PL-300 objective: " Convert semi-structured data to a table " | Study guide: https://learn.microsoft.com/en-us
/credentials/certifications/resources/study-guides/pl-300

質問 # 181
Which two types of visualizations can be used in the balance sheet reports to meet the reporting goals? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.

A. a ribbon chart that shows balances by quarter and accounts in the legend.
B. a clustered column chart that shows balances by date (x-axis) and account category (legend) without filters.
C. a clustered column chart that shows balances by quarter filtered to account categories that are long-term liabilities.
D. a line chart that shows balances by quarter filtered to account categories that are long-term liabilities.
E. a pie chart that shows balances by account category without filters.

正解：A、D

解説：
https://docs.microsoft.com/en-us/power-bi/visuals/power-bi-visualization-types-for-reports-and-q-and-a

質問 # 182
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