Exam (elaborations)
POWER BI DA-100 CERTIFICATION | QUESTIONS AND COMPLETE ANSWERS (LATEST UODATE 2024/2025)
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QUESTIONS AND ANSWERS
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POWER BI DA-100CERTIFICATION | QUESTIONS
AND COMPLETE ANSWERS
(LATEST UODATE 2024/2025)
If you want your data to automa.cally refresh as you interact with
visualiza.ons, which op.on should you choose?
A) Import
B) directquery
B) directquery
Explana.on: When you use directquery, no data is imported into Power BI
Desktop. As you create or interact with a visualiza.on, powerbi Desktop
queries the underlying data source, i.e. You're always viewing current data.
How do you connect to Excel files that contain target figures? The solu.on
should involve minimum manual work when new Excel files are created.
A) Connect to the files with Folder connector and use the Combine Binaries
func.onality.
B) Connect to a new file each month, perform transforma.ons, and use
Append func.on in Power Query Editor to combine all targets in the same
table.
A) Connect to the files with Folder connector and use the Combine Binaries
func.onality.
,Explana.on: Connec.ng to files separately will take .me if there are lots of files
in the folder. Its always bePer to connect to folder if files have same structure.
If you copy new files in that folder with same structure, that file will be loaded
automa.cally without doing any change to data sources.
Imagine that you have created a query named "Customers" in a powerbi
Desktop to append the rowss from three external tables with customer data
into a single output table named "Customers".
What would be the best approach to add a new fabricated ID column to the
Customers table to ensure that every row in the "Customers" table contains a
unique ID value?
A) Modify the Customer query by adding a counter column.
B) Modify the data model by extending the Customers table with a Counter
column.
C) Modify the customers query by adding an index column.
D) Modify the data model by extending the Customers table with an index
column.
C) Modify the Customers query by adding an index column.
Explana.on: Index column op.on is available in query editor to add indexed
column star.ng from 0, 1, or custom number.
,Which two of the following strategies are recommended when designing the
queries to import data from an OLTP-style database into a Power BI Desktop
project?
A) Normalizing the data model to make it bePer suited for data analysis and
repor.ng.
B) Denormalizing the data model to make it bePer suited for data analysis and
repor.ng.
C) Refactoring the imported tables into a mul.dimensional cube.
D) Refactoring the imported tables into a star schema.
B) Denormalizing the data model to make it bePer suited for data analysis and
repor.ng.
D) Refactoring the imported tables into a star schema.
Explana.on: Denormaliza.on and star schema is desired to transform the data
in the format that is best fit for visualiza.ons.
Which of the following statements are true with respect to designing a Power
BI Desktop project in directquery mode?
A) All queries within the project must be from a single source database.
B) No support for parent-child DAX func.ons.
, C) You cannot convert column data types when edi.ng a query.
D) You cannot add measures to the data model.
B) No support for parent-child func.ons.
Explana.on: When in directquery mode, it is not possible to use the family of
'DAX PATH( )' func.ons that generally handle parent-child structures, such as
chart of accounts, or employee hierarchies.
Which three transforma.ons are available when you right-click a column
header in the Query Editor window?
A) Remove
B) Duplicate Column
C) Change Type
D) Count Rows
A) Remove
B) Duplicate Column
C) Change Type
D) Count Rows
Answer: Count Rows op.on is not there when you right click on column.
When using the "Split Column by Delimiter" transforma.on, which op.on may
result in more than two columns?
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