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Free Microsoft Power BI Data Analyst sample questions and answers share
Q1:
DRAG DROP
You have a Microsoft Power BI data model that contains three tables named Sales, Product, and Date. The Sales table has an existing measure named [Total Sales] that sums the total sales from the Sales table.
You need to write a calculation that returns the percentage of total sales that a selected ProductCategoryName value represents. The calculation must respect any slicers on ProductCategoryName and must show the percentage of visible total sales.
For example, if there are four ProductCategoryName values, and a user filters one out, a table showing ProductCategoryName and the calculation must sum up to 100 percent.
How should you complete the calculation? To answer, drag the appropriate values to the correct targets. Each value may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
NOTE: Each correct selection is worth one point.
Select and Place:
Correct Answer:
Box 1: DIVIDE
As a data modeler, when you write a DAX expression to divide a numerator by a denominator, you can choose to use the DIVIDE function or the divide operator (/ – forward slash). When using the DIVIDE function, you must pass in the numerator
and denominator expressions.
Box 2: CALCULATE
CALCULATE evaluates an expression in a modified filter context.
Box 3: ALL SELECTED
ALL SELECTED removes context filters from columns and rows in the current query while retaining all other context filters or explicit filters.
The ALL SELECTED function gets the context that represents all rows and columns in the query while keeping explicit filters and contexts other than row and column filters. This function can be used to obtain visual totals in queries.
Example:
measure \’Reseller Sales\'[Reseller Visual Total]=calculate(sum(\’Reseller Sales\'[Sales Amount]), ALLSELECTED())
Reference:
https://docs.microsoft.com/en-us/dax/allselected-function-dax
Q2:
You have the tables shown in the following table.
The Impressions table contains approximately 30 million records per month. You need to create an ad analytics system to meet the following requirements: Present ad impression counts for the day, campaign, and Site_name. The analytics for the last year is required.
Minimize the data model size. Which two actions should you perform? Each correct answer presents part of the solution. NOTE: Each correct selection is worth one point.
A. Group the impressions by Ad_id, Site_name, and Impression_date.Aggregate by using the CountRows function.
B. Create one-to-many relationships between the tables.
C. Create a calculated measure that aggregates by using the COUNTROWS function.
D. Create a calculated table that contains Ad_id, Site_name, and Impression_date.
Correct Answer: AB
Grouping in power query reduces the number of rows in the impression table that is gonna be loaded in the model. Creating relationships doesn’t increase the size of the model.
Q3:
HOTSPOT
You have a Power Bl report that contains a measure named Total Sales.
You need to create a new measure that will return the sum of Total Sates for a year up to a selected date. How should you complete the DAX expression? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.
Hot Area:
Correct Answer:
Q4:
You have a Power Bl query named Sates that imports the columns shown in the following table.
Users only use the dale part of the Sales. Date field. Only rows with a Status of Finished are used in the analysis.
You need to reduce the load times of the query without affecting the analysis.
Which two actions achieve this goal? Each correct answer presents a complete solution.
NOTL Each correct selection is worth one pant.
A. Remove the rows in which sales [status] has a value of Canceled.
B. Change the data type of sale [Delivery_Time] to Integer
C. Removes (Canceled Date).
D. Split Sales [Sale_Date] into separate date and time columns.
E. Remove sales [Sales_Date].
Correct Answer: AD
Question 5:
HOTSPOT
You have a folder of monthly transaction extracts. You plan to create a report to analyze the transaction data.
You receive the following email message: “Hi. I\’ve put 24 files of monthly transaction data onto the shared drive. File Transactions201901.csv through Transactions201912.csv have the latest set of columns, but files Transactions201801.csv
to Transactions201812.csv have an older layout without the extra fields needed for analysis. Each file contains 10 to 50 transactions.”
You get data from the folder and select Combine and Load. The Combine Files dialog box is shown in the exhibit. (Click the Exhibit tab.)
For each of the following statements, select Yes if the statement is true. Otherwise, select No. NOTE: Each correct selection is worth one point.
Hot Area:
Correct Answer:
Box 1: Yes
The four columns used in the 2018 transactions are already displayed.
Box 2: Yes
The columns used are based on the entire dataset. The additional columns in the 2019 files will be detected.
Box 3: Yes
Note: Under the hoods, Power BI will automatically detect which delimiter to use, and may even promote the first row as headers. You can manually change the delimiter, or define how Power BI should handle data types. You can set it to automatically detect data types based on the first 200 rows, or the entire dataset or you can even opt out of the detection of data types.
Q6:
You need to create a relationship between the Weekly_Returns table and the Date table to meet the reporting requirements of the regional managers. What should you do?
A. In the Weekly. Returns table, create a new calculated column named date-id in a format of yyyymmdd and use the calculated column to create a relationship to the Date table.
B. Add the Weekly_Returns data to the Sales table by using related DAX functions.
C. Create a new table based on the Date table where date-id is unique, and then create many-to-many relationships to Weekly_Return.
Correct Answer: A
Scenario: Region managers require a visual to analyze weekly sales and returns. To relate the two tables we need a common column
Q7:
You create the following step by using Power Query Editor.
=Table.ReplaceValue(SalesLT_Address,”1318″,”1319″,Replacer.ReplaceText,{“AddressLine 1”})
A row has a value of 21318 Lasalle Street in the AddressLine1 column.
What will the value be when the step is applied?
A. 1318
B. 1319
C. 21318 Lasalle Street
D. 21319 Lasalle Street
Correct Answer: D
Example:
Replace the text “ur” with the text “or” in the table.
Reference: https://docs.microsoft.com/en-us/powerquery-m/table-replacevalue
Q8:
DRAG DROP
You use Power Bi Desktop to create a Power Bl data model and a blank report You need to add the Word Cloud visual shown in the following exhibit to the report.
The solution must minimize the development effort
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.
Select and Place:
Correct Answer:
Q9:
You need to review the data for which there are concerns before creating the data model. What should you do in Power Query Editor?
A. Select Column distribution.
B. Select the sales_amount column and apply a number filter.
C. Select Column profile, and then select the sales_amount column.
D. Transform the sales_amount column to replace negative values with 0.
Correct Answer: C
Because it has min and max info so you can see if there are negative values.
Reference: https://www.xspdf.com/resolution/50510644.html
Question 10:
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 on the review screen.
You have several reports and dashboards in a workspace.
You need to grant all organizational users read access to a dashboard and several reports.
Solution: You enable included in the app for all assets.
Does this meet the goal?
A. Yes
B. No
Correct Answer: B
Q11:
You have a Microsoft Excel file in a Microsoft OneDrive folder. The file must be imported to a Power Bi dataset You need to ensure that the dataset can be refreshed in powefbi.com.
Which two connectors can you use to connect to the file? Each correct answer presents a complete solution.
NOTE: Each correct selection is worth one point.
A. Text/CSV
B. Folder
C. Excel Workbook
D. SharePoint folder
E. Web
Correct Answer: DE
–
Copy and edit the Path of the Excel file then use “Web” Connector: Option E
–
Copy and edit the Path of the OneDrive folder then use the “Sharepoint Folder” connector: Option D Source: https://www.youtube.com/watch?v=GGHbbg6yi-A
Q12:
HOTSPOT
You have a Power BI model that has the following tables:
Product (Product_id, Product_Name)
Sales (Order_id, Order_Date, Product_id, Salesperson_id, Sales_Amount) Salesperson (Salesperson_id, Salesperson_name, address)
You plan to create the following measure.
Measure1 = DISTINCTCOUNT(Sales[ProductID])
You need to create the following relationships:
1. Sales to Product
2. Sales to Salesperson
The solution must ensure that you can use Measure1 to display the count of products sold by each salesperson.
How should you configure the relationships? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Hot Area:
Correct Answer:
Q13:
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 on 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 a 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 median line by using the Salary measure. Does this meet the goal?
A. Yes
B. No
Correct Answer: B
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_median.php
Question 14:
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 section, you will NOT be able to return to it. As a result, these questions will not appear on the review screen.
You have a query for a table named Sales. Sales has a column named CustomerlD. The Data Type of CustomerlD is Whole Number.
You refresh the data and find several errors. You discover that new entries in the Sales table contain non-numeric values. You need to ensure that non-numeric values in the CustomerlD column are set to 0.
Solution: From Query Editor, select the CustomerlD column and click Remove Errors.
Does this meet the goal?
A. Yes
B. No
Correct Answer: B
Q15:
You have a Power Bl report that contains five pages. Pages 1 to 4 are visible and page 5 is hidden. You need to create a solution that will enable users to quickly navigate from the first page to all the other visible pages.
The solution must minimize development and maintenance efforts as pages are added to the report. What should you do first?
A. Add a blank button to page 1.
B. Add a bookmark navigation button to page 1.
C. Create a bookmark for each page.
D. Add a page navigation button to page 1.
Correct Answer: D
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