Data analyst DA-100, DA100, DA100 - Practice Test, DA-10
1. You have a large dataset that contains more than 1 million rows. The table has a datetime column named
Date. You need to reduce the size of the data model. What should you do?
· A. Round the hour of the Date column to startOfHour.
· B. Change the data type of the Date column to Text.
· C. Trim the Date column.
· D. Split the Date column into two columns, one that contains only the time and another that contains only the
date.: D. Split the Date column into two columns, one that contains only the time and another that contains only the date.
2. You have a custom connector that returns ID, From, To, Subject, Body, and Has Attachments for every email
sent during the past year. More than 10 million records are returned.You build a report analyzing the internal
networks of employees based on whom they send emails to. You need to prevent report recipients from reading
the analyzed emails. The solution must minimize the model size. What should you do?
· A. Implement row-level security (RLS) so that the report recipients can only see results based on the emails
they sent.
· B. Remove the Subject and Body columns during the import.
· C. From Model view, set the Subject and Body columns to Hidden.: · B. Remove the Subject and Body
columns during the import.
3. 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 are
required.
Minimize the data model size.
Which two actions should you perform? Each correct answer presents part of the solution.
A. Group the impressions by Ad_id, Site_name, and Impression_date. Aggre- gate 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 Impres- sion_date.: 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.
, Data analyst DA-100, DA100, DA100 - Practice Test, DA-10
4. Your company has training videos that are published to Microsoft Stream. You need to surface the videos
directly in a Microsoft Power BI dashboard. Which type of tile should you add?
· A. video
· B. custom streaming data
· C. text box
· D. web content: · D. web content
5. You open a query in Power Query Editor.You need to identify the percentage of empty values in each column
as quickly as possible. Which Data Preview option should you select?
· A. Show whitespace
· B. Column profile
· C. Column distribution
· D. Column quality: · D. Column quality
6. You have a prospective customer list that contains 1,500 rows of data. The list contains the following fields:
First name Last name
Email address
State/Region Phone
number
You import the list into Power Query Editor. You need to ensure that the list contains records for each
State/Region to which you want to target a marketing campaign. Which two actions should you perform?
· A. Open the Advanced Editor.
· B. Select Column quality.
· C. Enable Column profiling based on entire dataset.
· D. Select Column distribution.
· E. Select Column profile.: · C. Enable Column profiling based on entire dataset.
· E. Select Column profile.
7. HOTSPOT -You have an API that returns more than 100 columns. The follow- ing is a sample of column
names.
client_notified_timestamp client_notified_source
client_notified_sourceid client_notified_value
client_responded_timestamp client_responded_source
client_responded_sourceid
, Data analyst DA-100, DA100, DA100 - Practice Test, DA-10
client_responded_value
You plan to include only a subset of the returned columns.You need to remove any columns that have a suffix of
sourceid. How should you complete the Power Query M code? To answer, select the appropriate options in the
answer area.: 1. Remove Column
2. List.Select
3. Text.EndsWith
8. DRAG DROP - You are building a dataset from a JSON file that contains
an array of documents.You need to import attributes as columns from all the documents in the JSON file. The
solution must ensure that date attributes can be used as date hierarchies in Microsoft Power BI reports. Which thr
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:: 1. Convert the list to a table
2. Expand the columns
3. Set the data types
9. You import two Microsoft Excel tables named Customer and Address into Power Query. Customer contains
the following columns:
Customer ID Customer
Name Phone
Email Address
Address ID
Address contains the following columns: Address ID
Address Line 1
Address Line 2 City
State/Region
Country
Postal Code
The Customer ID and Address ID columns represent unique rows.You need to create a query that has one row pe
customer. Each row must contain City, State/Region, and Country for each customer. What should you do?
· A. Merge the Customer and Address tables.
· B. Transpose the Customer and Address tables.
· C. Group the Customer and Address tables by the Address ID column.
· D. Append the Customer and Address tables.: · A. Merge the Customer and Address tables.
, Data analyst DA-100, DA100, DA100 - Practice Test, DA-10
10.You have the following three versions of an Azure SQL database: Test
Production
Development
You have a dataset that uses the development database as a data source. You need to configure the dataset so that
you can easily change the data source between the development, test, and production database servers from
powerbi.com. Which should you do?
· A. Create a JSON file that contains the database server names. Import the JSON file to the dataset.
· B. Create a parameter and update the queries to use the parameter.
· C. Create a query for each database server and hide the development tables.
· D. Set the data source privacy level to Organizational and use the Replace- Value Power Query M function.: ·
B. Create a parameter and update the queries to use the parameter.
11.You have a data model that contains many complex DAX expressions. The expressions contain frequent
references to the RELATED and RELATED- TABLE functions. You need to recommend a solution to minimize
the use of the RELATED and RELATEDTABLE functions. What should you recommend?
· A. Split the model into multiple models.
· B. Hide unused columns in the model.
· C. Merge tables by using Power Query.
· D. Transpose.: · C. Merge tables by using Power Query.
12.You have a CSV file that contains user complaints. The file contains a column named Logged. Logged
contains the date and time each compliant occurred. The data in Logged is in the following format: 2018-12-31
at 08:59. You need to be able to analyze the complaints by the logged date and use a built-in date hierarchy.
What should you do?
· A. Change the data type of the Logged column to Date.
· B. Apply a transform to extract the last 11 characters of the Logged column and set the data type of the new
column to Date.
· C. Create a column by example that starts with 2018-12-31 and set the data type of the new column to Date.
· D. Apply a transform to extract the first 11 characters of the Logged column.-
: D. Apply a transform to extract the first 11 characters of the Logged column.
13.You have an Azure SQL database that contains sales transactions. The database is updated frequently. You
need to generate reports from the data to detect fraudulent transactions. The data must be visible within five
minutes of an update. How should you configure the data connection?
1. You have a large dataset that contains more than 1 million rows. The table has a datetime column named
Date. You need to reduce the size of the data model. What should you do?
· A. Round the hour of the Date column to startOfHour.
· B. Change the data type of the Date column to Text.
· C. Trim the Date column.
· D. Split the Date column into two columns, one that contains only the time and another that contains only the
date.: D. Split the Date column into two columns, one that contains only the time and another that contains only the date.
2. You have a custom connector that returns ID, From, To, Subject, Body, and Has Attachments for every email
sent during the past year. More than 10 million records are returned.You build a report analyzing the internal
networks of employees based on whom they send emails to. You need to prevent report recipients from reading
the analyzed emails. The solution must minimize the model size. What should you do?
· A. Implement row-level security (RLS) so that the report recipients can only see results based on the emails
they sent.
· B. Remove the Subject and Body columns during the import.
· C. From Model view, set the Subject and Body columns to Hidden.: · B. Remove the Subject and Body
columns during the import.
3. 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 are
required.
Minimize the data model size.
Which two actions should you perform? Each correct answer presents part of the solution.
A. Group the impressions by Ad_id, Site_name, and Impression_date. Aggre- gate 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 Impres- sion_date.: 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.
, Data analyst DA-100, DA100, DA100 - Practice Test, DA-10
4. Your company has training videos that are published to Microsoft Stream. You need to surface the videos
directly in a Microsoft Power BI dashboard. Which type of tile should you add?
· A. video
· B. custom streaming data
· C. text box
· D. web content: · D. web content
5. You open a query in Power Query Editor.You need to identify the percentage of empty values in each column
as quickly as possible. Which Data Preview option should you select?
· A. Show whitespace
· B. Column profile
· C. Column distribution
· D. Column quality: · D. Column quality
6. You have a prospective customer list that contains 1,500 rows of data. The list contains the following fields:
First name Last name
Email address
State/Region Phone
number
You import the list into Power Query Editor. You need to ensure that the list contains records for each
State/Region to which you want to target a marketing campaign. Which two actions should you perform?
· A. Open the Advanced Editor.
· B. Select Column quality.
· C. Enable Column profiling based on entire dataset.
· D. Select Column distribution.
· E. Select Column profile.: · C. Enable Column profiling based on entire dataset.
· E. Select Column profile.
7. HOTSPOT -You have an API that returns more than 100 columns. The follow- ing is a sample of column
names.
client_notified_timestamp client_notified_source
client_notified_sourceid client_notified_value
client_responded_timestamp client_responded_source
client_responded_sourceid
, Data analyst DA-100, DA100, DA100 - Practice Test, DA-10
client_responded_value
You plan to include only a subset of the returned columns.You need to remove any columns that have a suffix of
sourceid. How should you complete the Power Query M code? To answer, select the appropriate options in the
answer area.: 1. Remove Column
2. List.Select
3. Text.EndsWith
8. DRAG DROP - You are building a dataset from a JSON file that contains
an array of documents.You need to import attributes as columns from all the documents in the JSON file. The
solution must ensure that date attributes can be used as date hierarchies in Microsoft Power BI reports. Which thr
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:: 1. Convert the list to a table
2. Expand the columns
3. Set the data types
9. You import two Microsoft Excel tables named Customer and Address into Power Query. Customer contains
the following columns:
Customer ID Customer
Name Phone
Email Address
Address ID
Address contains the following columns: Address ID
Address Line 1
Address Line 2 City
State/Region
Country
Postal Code
The Customer ID and Address ID columns represent unique rows.You need to create a query that has one row pe
customer. Each row must contain City, State/Region, and Country for each customer. What should you do?
· A. Merge the Customer and Address tables.
· B. Transpose the Customer and Address tables.
· C. Group the Customer and Address tables by the Address ID column.
· D. Append the Customer and Address tables.: · A. Merge the Customer and Address tables.
, Data analyst DA-100, DA100, DA100 - Practice Test, DA-10
10.You have the following three versions of an Azure SQL database: Test
Production
Development
You have a dataset that uses the development database as a data source. You need to configure the dataset so that
you can easily change the data source between the development, test, and production database servers from
powerbi.com. Which should you do?
· A. Create a JSON file that contains the database server names. Import the JSON file to the dataset.
· B. Create a parameter and update the queries to use the parameter.
· C. Create a query for each database server and hide the development tables.
· D. Set the data source privacy level to Organizational and use the Replace- Value Power Query M function.: ·
B. Create a parameter and update the queries to use the parameter.
11.You have a data model that contains many complex DAX expressions. The expressions contain frequent
references to the RELATED and RELATED- TABLE functions. You need to recommend a solution to minimize
the use of the RELATED and RELATEDTABLE functions. What should you recommend?
· A. Split the model into multiple models.
· B. Hide unused columns in the model.
· C. Merge tables by using Power Query.
· D. Transpose.: · C. Merge tables by using Power Query.
12.You have a CSV file that contains user complaints. The file contains a column named Logged. Logged
contains the date and time each compliant occurred. The data in Logged is in the following format: 2018-12-31
at 08:59. You need to be able to analyze the complaints by the logged date and use a built-in date hierarchy.
What should you do?
· A. Change the data type of the Logged column to Date.
· B. Apply a transform to extract the last 11 characters of the Logged column and set the data type of the new
column to Date.
· C. Create a column by example that starts with 2018-12-31 and set the data type of the new column to Date.
· D. Apply a transform to extract the first 11 characters of the Logged column.-
: D. Apply a transform to extract the first 11 characters of the Logged column.
13.You have an Azure SQL database that contains sales transactions. The database is updated frequently. You
need to generate reports from the data to detect fraudulent transactions. The data must be visible within five
minutes of an update. How should you configure the data connection?
