If you want your data to automatically refresh as you interact with visualizations, which op-
tion should you choose?
A) Import
B) DirectQuery - ANSWER B) DirectQuery
Explanation: When you use DirectQuery, no data is imported into Power BI Desktop. As you
create or interact with a visualization, 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 solution should involve
minimum manual work when new Excel files are created.
A) Connect to the files with Folder connector and use the Combine Binaries functionality.
B) Connect to a new file each month, perform transformations, and use Append function in
Power Query Editor to combine all targets in the same table. - ANSWER A) Connect to the
files with Folder connector and use the Combine Binaries functionality.
Explanation: Connecting to files separately will take time if there are lots of files in the folder.
Its always better 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 automatically 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".
1
,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. - AN-
SWER C) Modify the Customers query by adding an index column.
Explanation: Index column option is available in query editor to add indexed column starting
from 0, 1, or custom number.
Which two of the following strategies are recommended when designing the queries to im-
port data from an OLTP-style database into a Power BI Desktop project?
A) Normalizing the data model to make it better suited for data analysis and reporting.
B) Denormalizing the data model to make it better suited for data analysis and reporting.
C) Refactoring the imported tables into a multidimensional cube.
D) Refactoring the imported tables into a star schema. - ANSWER B) Denormalizing the
data model to make it better suited for data analysis and reporting.
D) Refactoring the imported tables into a star schema.
2
, Explanation: Denormalization and star schema is desired to transform the data in the format
that is best fit for visualizations.
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 functions.
C) You cannot convert column data types when editing a query.
D) You cannot add measures to the data model. - ANSWER B) No support for parent-child
functions.
Explanation: When in DirectQuery mode, it is not possible to use the family of 'DAX PATH( )'
functions that generally handle parent-child structures, such as chart of accounts, or em-
ployee hierarchies.
Which three transformations are available when you right-click a column header in the
Query Editor window?
A) Remove
B) Duplicate Column
C) Change Type
3
tion should you choose?
A) Import
B) DirectQuery - ANSWER B) DirectQuery
Explanation: When you use DirectQuery, no data is imported into Power BI Desktop. As you
create or interact with a visualization, 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 solution should involve
minimum manual work when new Excel files are created.
A) Connect to the files with Folder connector and use the Combine Binaries functionality.
B) Connect to a new file each month, perform transformations, and use Append function in
Power Query Editor to combine all targets in the same table. - ANSWER A) Connect to the
files with Folder connector and use the Combine Binaries functionality.
Explanation: Connecting to files separately will take time if there are lots of files in the folder.
Its always better 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 automatically 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".
1
,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. - AN-
SWER C) Modify the Customers query by adding an index column.
Explanation: Index column option is available in query editor to add indexed column starting
from 0, 1, or custom number.
Which two of the following strategies are recommended when designing the queries to im-
port data from an OLTP-style database into a Power BI Desktop project?
A) Normalizing the data model to make it better suited for data analysis and reporting.
B) Denormalizing the data model to make it better suited for data analysis and reporting.
C) Refactoring the imported tables into a multidimensional cube.
D) Refactoring the imported tables into a star schema. - ANSWER B) Denormalizing the
data model to make it better suited for data analysis and reporting.
D) Refactoring the imported tables into a star schema.
2
, Explanation: Denormalization and star schema is desired to transform the data in the format
that is best fit for visualizations.
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 functions.
C) You cannot convert column data types when editing a query.
D) You cannot add measures to the data model. - ANSWER B) No support for parent-child
functions.
Explanation: When in DirectQuery mode, it is not possible to use the family of 'DAX PATH( )'
functions that generally handle parent-child structures, such as chart of accounts, or em-
ployee hierarchies.
Which three transformations are available when you right-click a column header in the
Query Editor window?
A) Remove
B) Duplicate Column
C) Change Type
3
