DA-100 — Free Practice Questions
10 free sample questions from a bank of 94, with the correct answers and explanations. No signup required — start practising right now.
1You 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?
- Implement row-level security (RLS) so that the report recipients can only see results based on the emails they sent.
- Remove the Subject and Body columns during the import.
- From Model view, set the Subject and Body columns to Hidden.
Answer: B
2You have a CSV file that contains user complaints. The file contains a column named Logged. Logged contains the date and time each complaint 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?
- Change the data type of the Logged column to Date.
- Apply a transformation to extract the last 11 characters of the Logged column and set the data type of the new column to Date.
- Create a column by example that starts with 2018-12-31 and set the data type of the new column to Date.
- Add a conditional column that outputs 2018 if the Logged column starts with 2018 and set the data type of the new column to Whole Number.
Answer: C
3You 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?
- Add a SQL statement.
- Set Data Connectivity mode to DirectQuery.
- Set the Command timeout in minutes setting.
- Set Data Connectivity mode to Import.
Answer: B
4You have a data model that contains many complex DAX expressions. The expressions contain frequent references to the RELATED and RELATEDTABLE functions.
You need to recommend a solution to minimize the use of the RELATED and RELATEDTABLE functions.
What should you recommend?
- Split the model into multiple models.
- Hide unused columns in the model.
- Merge tables by using Power Query.
- Transpose.
Answer: C
5You 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 without losing access to any data.
What should you do?
- Round the hour of the Date column to startOfHour.
- Change the data type of the Date column to Text.
- Trim the Date column.
- Split the Date column into two columns, one that contains only the time and another that contains only the date.
Answer: D
6DRAG DROP -
You are modeling data in a table named SalesDetail by using Microsoft Power BI.
You need to provide end users with access to the summary statistics about the SalesDetail data. The users require insights on the completeness of the data and the value distributions.
Which three 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:
Answer:
7You create the following step by using Power Query Editor.
- Table.ReplaceValue(SalesLT_Address,"1318","1319",Replacer.ReplaceText,{"AddressLine1"})
A row has a value of 21318 Lasalle Street in the AddressLine1 column.
What will the value be when the step is applied?
- 1318
- 1319
- 21318 Lasalle Street
- 21319 Lasalle Street
Answer: D
8You have a Microsoft Power BI report. The size of PBIX file is 550 MB. The report is accessed by using an App workspace in shared capacity of powerbi.com.
The report uses an imported dataset that contains one fact table. The fact table contains 12 million rows. The dataset is scheduled to refresh twice a day at 08:00 and 17:00.
The report is a single page that contains 15 AppSource visuals and 10 default visuals.
Users say that the report is slow to load the visuals when they access and interact with the report.
You need to recommend a solution to improve the performance of the report.
What should you recommend?
- Increase the number of times that the dataset is refreshed.
- Split the visuals onto multiple pages.
- Change the imported dataset to DirectQuery.
- Implement row-level security (RLS).
Answer: B
9You create a dashboard by using the Microsoft Power BI Service. The dashboard contains a card visual that shows total sales from the current year.
You grant users access to the dashboard by using the Viewer role on the workspace.
A user wants to receive daily notifications of the number shown on the card visual.
You need to automate the notifications.
What should you do?
- Create a data alert.
- Share the dashboard to the user.
- Create a subscription.
- Tag the user in a comment.
Answer: C
10Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
You are modeling data by using Microsoft Power BI. Part of the data model is a large Microsoft SQL Server table named Order that has more than 100 million records.
During the development process, you need to import a sample of the data from the Order table.
Solution: From Power Query Editor, you import the table and then add a filter step to the query.
Does this meet the goal?
- Yes
- No
Answer: B
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