Data Analysis Expressions (DAX)
This assessment consists of 20 multiple choice questions related to Microsoft DAX language, a formula language used for data analysis and modeling in various Microsoft products, including Power BI. The questions cover a range of DAX functions and concepts, such as calculating running totals, filtering tables, concatenating strings, and returning related values. Each question has four options, and the correct answer is provided for each. This assessment is designed to test the participant's understanding of the DAX language and their ability to apply it in practical scenarios.
1. What does DAX stand for?
A. Data Analysis Expression
B. Data Analytics Exchange
C. Database Administration Extension
D. Data Access eXpression
Your answer:
2. Which tool is used to write and execute DAX formulas?
A. Power BI Desktop
B. Excel
C. SQL Server Management Studio
D. Visual Studio
Your answer:
3. What is the purpose of the CALCULATE function in DAX?
A. To perform calculations on a column of data
B. To apply filters to a calculation
C. To retrieve data from a database
D. To create a new column of data
Your answer:
4. Which DAX function is used to return the maximum value from a column?
A. MAX
B. MIN
C. COUNT
D. AVERAGE
Your answer:
5. What is the result of the following DAX formula: CALCULATE(SUM(Sales[Amount]), FILTER(Sales, Sales[Region] = "West"))
A. The sum of sales amounts for all regions
B. The sum of sales amounts for the West region
C. The average of sales amounts for all regions
D. The average of sales amounts for the West region
Your answer:
6. Which DAX function is used to calculate the year-to-date total for a given measure?
A. TOTALYTD
B. TOTALQTD
C. TOTALMTD
D. TOTALYLD
Your answer:
7. What is the result of the following DAX formula: AVERAGE(Sales[Amount])
A. The average of all values in the Sales[Amount] column
B. The average of distinct values in the Sales[Amount] column
C. The median of all values in the Sales[Amount] column
D. The mode of all values in the Sales[Amount] column
Your answer:
8. Which DAX function is used to return a table that is filtered based on a condition?
A. FILTER
B. CALCULATETABLE
C. SUMMARIZE
D. ADDCOLUMNS
Your answer:
9. What is the result of the following DAX formula: COUNTROWS(FILTER(Sales, Sales[Amount] > 100))
A. The number of rows in the Sales table where the Amount is greater than 100
B. The number of distinct values in the Sales[Amount] column that are greater than 100
C. The total sales amount for all rows where the Amount is greater than 100
D. The average sales amount for all rows where the Amount is greater than 100
Your answer:
10. Which DAX function is used to concatenate strings together?
A. CONCATENATE
B. CONCATENATEX
C. & (ampersand) operator
D. ALLSELECTED
Your answer:
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