Unit 2 - Practice Quiz

INT374 50 Questions
0 Correct 0 Wrong 50 Left
0/50

1 In the context of Power BI, what represents the 'Back-End' of the application?

A. The Model View
B. Power BI Service
C. Power Query Editor
D. The Report View

2 Which programming language is used behind the scenes in Power Query?

A. SQL
B. M Language
C. DAX
D. Python

3 What is the primary function of the 'Navigator' window when connecting to data?

A. To merge datasets
B. To write SQL queries
C. To create visualizations
D. To preview and select tables or sheets to import

4 Which connector would you use to import multiple Excel files with the same structure from a single directory?

A. Excel Workbook
B. Text/CSV
C. Folder
D. SharePoint List

5 In Power Query, what does the 'Applied Steps' pane track?

A. The list of available data sources
B. The DAX formulas used in the report
C. The user's login history
D. Every data transformation action performed on the query

6 What is the best way to clean a text column that contains unnecessary leading and trailing whitespace?

A. Trim
B. Clean
C. Replace Values
D. Format -> Lowercase

7 What is the purpose of the 'Clean' transformation in the Text tools?

A. Removes spaces
B. Removes duplicate rows
C. Removes null values
D. Removes non-printable control characters

8 When connecting to a SQL Database, which mode allows data to remain in the database without caching it in Power BI?

A. Import
B. Live Connection
C. Dual
D. DirectQuery

9 You have a column 'OrderDate' formatted as 'Text' (e.g., '12/31/2022'). How should you fix this for time intelligence?

A. Replace the slashes with hyphens
B. Change Type to Date
C. Split the column
D. Leave it as Text

10 Which feature helps you extract data from a website table just by providing the URL?

A. OData Feed
B. Web Connector
C. JSON Connector
D. Azure Blob Storage

11 Which Data Profiling tool displays the percentage of Empty, Error, and Valid values in a column?

A. Column Distribution
B. Column Profile
C. Column Quality
D. Monospace

12 What does 'Column Distribution' show in the View tab?

A. The applied steps
B. The statistical average
C. The data type of the column
D. A frequency histogram and count of distinct/unique values

13 If you need to change a text date '15-Jan-2023' to a Date type, but your system settings are US (MM/DD/YYYY), which feature should you use?

A. Format -> Uppercase
B. Using Locale
C. Split Column
D. Change Type -> Date

14 What is the result of using 'Unpivot Columns' on a dataset?

A. It turns rows into columns
B. It removes duplicate columns
C. It turns selected columns into attribute-value pairs (rows)
D. It aggregates data

15 What is the purpose of an 'Index Column'?

A. To group duplicate rows
B. To add a unique sequential number to each row
C. To sort data alphabetically
D. To index the data for faster search

16 Which tool allows you to create a new column based on 'If-Then-Else' logic without writing code?

A. Example Column
B. Custom Column
C. Index Column
D. Conditional Column

17 You want to combine two tables by stacking them vertically (adding rows from one table to another). Which operation is this?

A. Transpose
B. Merge Queries
C. Group By
D. Append Queries

18 You want to combine two tables based on a common column (similar to a VLOOKUP or SQL JOIN). Which operation is this?

A. Merge Queries
B. Pivot Column
C. Append Queries
D. Transpose

19 In a 'Left Outer' join merge, what is the result?

A. All rows from the second table and matching rows from the first
B. Only matching rows from both tables
C. All rows from both tables
D. All rows from the first table and matching rows from the second

20 What does the 'Fill Down' transformation do?

A. Fills null values with zero
B. Replaces null values with the value from the cell above
C. Copies the header to the first row
D. Removes empty rows

21 How can you extract the domain name from an email address column in Power Query?

A. Unpivot
B. Split Column by Delimiter (@)
C. Transpose
D. Change Type

22 Which transformation turns rows into columns (e.g., turning a column of 'Year' values into individual column headers)?

A. Pivot Column
B. Reverse Rows
C. Unpivot
D. Transpose

23 What happens if you change the file location of your data source on your computer?

A. The query breaks and returns an error
B. Power BI automatically finds the new location
C. Power BI deletes the dataset
D. The data becomes static

24 Where can you update the file path if a source file is moved?

A. Advanced Editor
B. Applied Steps
C. Manage Relationships
D. Data Source Settings

25 What does the 'Group By' feature do?

A. Summarizes data at a higher level of granularity
B. Merges two tables
C. Colors rows based on groups
D. Sorts data into folders

26 Which of the following is NOT a valid aggregation in the 'Group By' window?

A. Average
B. Split
C. Count Rows
D. Sum

27 If you import a CSV and the headers appear as 'Column1', 'Column2' in the first row of data, what step should you apply?

A. Remove Top Rows
B. Pivot
C. Transpose
D. Use First Row as Headers

28 What is the purpose of 'Remove Top Rows'?

A. To remove metadata or blank lines often found at the top of reports
B. To sample the data
C. To delete the headers
D. To filter out low sales

29 Which Date tool calculates the age of a record based on the current date?

A. Earliest
B. Age
C. Year
D. Month

30 When extracting data from a web page, 'Add Table Using Examples' allows you to:

A. Hack the website
B. Write HTML code
C. Define the data you want by typing sample values
D. Download images

31 What is a 'Reference' query?

A. A backup query
B. A duplicate copy of a query
C. A new query that sources its data from the output of an existing query
D. A query linked to a website

32 What is the difference between 'Duplicate' and 'Reference' query?

A. Reference creates a static table
B. They are identical
C. Duplicate copies the steps; Reference depends on the original query's output
D. Reference copies the steps; Duplicate depends on output

33 Which numeric transformation would you use to find the remainder of a division operation?

A. Divide
B. Absolute Value
C. Round
D. Modulo

34 To convert a column of values like 'USD 50', 'USD 100' into pure numbers, what is the best approach?

A. Change Type to Whole Number immediately
B. Format as Currency
C. Replace 'USD ' with nothing, then Change Type
D. Filter out USD

35 What does the 'Transpose' function do?

A. Deletes empty columns
B. Moves columns to the left
C. Sorts data
D. Rotates the table 90 degrees (rows become columns)

36 Which View tab option allows you to see the exact code generated by your transformations?

A. Monospaced
B. Advanced Editor
C. Query Dependencies
D. Parameters

37 In 'Column Profile', what does 'Value Distribution' display?

A. The count of errors
B. The database source
C. The column name
D. A graph showing the frequency of specific values in the column

38 You have a 'Product ID' column like 'AB-123-XY'. You want only the middle number '123'. Which Text tool is best?

A. Merge Columns
B. Format -> Trim
C. Extract -> Text Between Delimiters
D. Split by Delimiter

39 What is the primary benefit of 'Query Folding' in database connections?

A. It compresses the file size
B. It pushes transformation logic back to the source database for performance
C. It creates folders for queries
D. It folds columns into rows

40 If a step in Power Query results in an 'Error' value in a cell, how can you handle it to prevent breaking the load?

A. Ignore it
B. Filter the error
C. Delete the column
D. Replace Errors

41 Which feature helps visualize the relationship and flow between different queries in Power Query?

A. Query Dependencies
B. Relationship Manager
C. Data Model
D. Lineage View

42 When merging queries, what happens if there are multiple matches for a row in the secondary table?

A. It returns an error
B. It creates duplicate rows in the primary table (Cartesian product)
C. It takes the first match only
D. It takes the last match only

43 How do you combine three columns (Day, Month, Year) into a single Date column?

A. Split Column
B. Merge Columns
C. Pivot
D. Transpose

44 Which numerical tool calculates the total of a column without using Group By?

A. Scientific -> Power
B. Standard -> Add
C. Statistics -> Sum
D. Information -> Sign

45 In Power Query, 'Disable Load' is used to:

A. Stop the query from being loaded into the Report/Data Model
B. Stop the query from refreshing
C. Hide the query in the editor
D. Delete the query

46 What does 'Close & Apply' do?

A. Saves the M code but does not load data
B. Deletes all steps
C. Closes Power Query Editor and loads the transformed data into the model
D. Closes Power BI Desktop

47 Which option allows you to input data manually to create a small static table?

A. Enter Data
B. New Source -> Text
C. Recent Sources
D. DirectQuery

48 You want to create a column that says 'High' if Sales > 100 and 'Low' otherwise. You should use:

A. Conditional Column
B. Index Column
C. Split Column
D. Duplicate Column

49 What is the file extension for a Power BI Template file?

A. .pbix
B. .xls
C. .sql
D. .pbit

50 When using 'Date & Time' tools, what does 'Date Only' do?

A. Deletes the column
B. Changes the time zone
C. Removes the time component from a DateTime column
D. Extracts the year