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最新的 Microsoft Certified: Power BI Data Analyst Associate PL-300 免費考試真題 (Q455-Q460):

問題 #455
In Power Query Editor, you have a query named Sales Data that contains the following columns.

You need to create two queries named Product Dimension and Sales Fact based on the Sales Data query. The solution must minimize maintenance effort and the site of the semantic model.
Which two actions should you perform? Each correct answer presents part of the solution.
NOTE Each correct selection is worth one point.

A. Disable the load for the Sales Fact query.
B. Disable the load for the sales Data query.
C. Clear Include in report refresh for the Sales Data query.
D. Duplicate the Sates Data query to create the new queries.
E. Reference the Sales Data query to create the new queries.

答案：C,E

問題 #456
Hotspot Question
You have a semantic model that contains two tables named Table1 and Table2.
You need to create a new aggregated date table. The solution must meet the following requirements:
- The start date must be the earliest value in Table1.
- The end date must be the latest value in either Table1 or Table2.
How should you complete the DAX statement? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.

答案：

解題說明：

Explanation:
Box 1: MIN
The start date must be the earliest value in Table1.
To get the minimum value from a date column in a Power BI semantic model, you should use the MIN function.
MIN returns the smallest value in a column or between two scalar expressions. It works directly on date columns to return the earliest date.
Example:
dax
Earliest Date = MIN(Sales[OrderDate])
You should use the MIN function to get the minimum value from a date column in a Power BI table.
Box 2: MAXX
The end date must be the latest value in either Table1 or Table2.
You can use a combination of the DAX functions MAXX, UNION, and SELECTCOLUMNS to find the single latest value from date columns in two different tables.
Box 3: UNION
Using UNION and MAXX
This method is valid, particularly if you want to create a virtual table for further operations. This creates a single-column virtual table containing all dates from both tables, and then finds the maximum value within that virtual table.
DAX
Latest Global Date (Union) =
MAXX(
UNION(
SELECTCOLUMNS(Table1, "CombinedDate", Table1[DateColumn]),
SELECTCOLUMNS(Table2, "CombinedDate", Table2[DateColumn])
),
[CombinedDate]
)
The SELECTCOLUMNS function ensures both tables presented to the UNION function have an identical column structure (specifically, the same column name "CombinedDate"), which is a requirement for UNION to work correctly. MAXX then iterates over the combined virtual table to find the maximum date value.
Reference:
https://learn.microsoft.com/en-us/dax/min-function-dax
https://community.fabric.microsoft.com/t5/Desktop/How-to-get-the-max-date-from-two-date- tables/td-p/3685084

問題 #457
You are building a data model for a Power Bl report. You have data formatted as shown in the following table.

You need to create a clustered bar chart as shown in the following exhibit.
What should you do?

A. in a DAX function, create two measures named Machine and User by using the substitute function.
B. From Power Query Editor, split the Machine-User column by using a delimiter.
C. From Power Query Editor, create a column that contains the last three digits of the Machine-User column.
D. In a DAX function, create two calculated columns named Machine and User by using the substitute function.

答案：B

問題 #458
You have two Power Bl workspaces named WorkspaceA and Workspaces. WorkspaceA contains two datasets named Sales and HR.
You need to provide a user named User1 with access to the workspaces. The solution must meet the following requirements:
* Create reports that use the HR dataset.
* Publish the reports to WorkspaceB.
* Prevent the ability to modify the HR dataset.
* Prevent the ability to add users to WorkspaceB.

答案：

解題說明：
See the explanation for the answer.
Explanation
Answer is as below.

問題 #459
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
After you answer a question in this scenario, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
You have a clustered bar chart that contains a measure named Salary as the value and a field named Employee as the axis. Salary is present in the data as numerical amount representing US dollars.
You need to create a reference line to show which employees are above the median salary.
Solution: You create a percentile line by using the Salary measure and set the percentile to 50%.
Does this meet the goal?

A. Yes
B. No

答案：A

解題說明：
Explanation
The 50th percentile is also known as the median or middle value where 50 percent of observations fall below.
Reference:
https://dash-intel.com/powerbi/statistical_functions_percentile.php

問題 #460
......

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