Wednesday, February 28, 2024
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Microsoft Power BI Data Analyst Professional Certificate (PL-300) : Sample Questions (Part-2)

12:05 PM

 





Part-1


1.

Question 1

Multiple Microsoft Excel files are saved in a folder and synced with Microsoft’s OneDrive for Business. You need to import data from files without using the data gateway. Which type of Power BI data connector should you use?

1 / 1 point

Excel workbook

OneDrive for business

SharePoint folder

SharePoint list

Correct

That’s correct! A SharePoint folder is the only connector that allows you to import multiple Excel files stored in a OneDrive for Business folder without using a data gateway.

2.

Question 2

You are importing your Power BI project data from a SQL Server database. Which Power BI desktop view can you use to change the storage mode of the tables?

1 / 1 point

Report view

Data view

Page view

Model view

Correct

That’s correct! You need to navigate to the Model view of Power BI desktop and use the Properties pane to change the storage mode of tables.

3.

Question 3

You have an Azure SQL database that contains sales transactions. The database is updated frequently. You are asked to create a report from the data to detect fraudulent transactions. The data must be visible within five minutes of any update. How will you configure the data connection?

1 / 1 point

By setting data connectivity to DirectQuery.

By setting a command timeout in minutes.

By setting data connectivity to import mode.

By adding a SQL statement.

Correct

That’s correct! With DirectQuery, you can ensure the data is refreshed within the required time frequency. Your reports will be automatically updated as the new data is updated to the source database.

4.

Question 4

You have created a Power BI data source that uses SQL SELECT statements. The SQL statement queries multiple tables in a SQL Server database and includes subqueries. When you import the data to Power BI, you receive the error message “Timeout expired”. You have checked the SQL connection and confirmed the Server has sufficient bandwidth and low latency. To minimize the timeout occurrence issue, what should you do?

1 / 1 point

Implement aggregations in SQL statement.

Replace subqueries with nested queries.

Break down the SQL statement into separate data sources.

Implement groupings in SQL statement.

Correct

That’s correct! Dividing the SQL statement into separate data source would minimize the amount of processing on SQL Server side. This would minimize or even eliminate the timeout issues.

5.

Question 5

Your data model contains a sales table with an OrderDate column. You want to analyze and visualize the sales data grouped by month. What transformation command of the Power query editor lets you create a month column without using DAX expression?

1 / 1 point

Trim

Group By

Date

Extract

Correct

That’s correct! From the Power query editor, you need to select the Date and choose Name of the month from the drop-down option. A new column with the month name is added to the table that you will use to visualize sales by month.

6.

Question 6

One of your columns in the data model contains information about the mailing address's city, state, and postal code. You must separate the fields to access the geospatial elements for map visualization. What transformation should you apply?

1 / 1 point

Split column

Modify data category

Replace values

Modify data type

Correct

That’s correct! You can split the column based on the delimiter present in the original column and use the resulting columns for geospatial visualization.

7.

Question 7

You have developed a query named Customers in Power BI desktop to append the rows from three external tables having customer data into a single customer table. You want to ensure each row in the new customer table has a unique ID value. What is the best way to add an ID column to the customer table?

0 / 1 point

Change the data model by extending the Customers table with an index column.

Change the data model by extending the Customers table with a counter column.

Modify the data model by adding an index column.

Modify the data model by adding a counter column.

Incorrect

Not quite. Please review the video Combining tables with merge.

8.

Question 8

Your Power BI dataset has a table where each row represents a city, and there are columns for the population in different years like Population_2019, Population_2020, and so on. You want to display the data with a single column for the year and another column for the population. What transformation step can you achieve in Power BI?

1 / 1 point

Unpivot columns

Merge queries

Split columns

Pivot column

Correct

That’s correct! Unpivot columns is the most suitable transformation operation in the query editor to convert multiple columns into rows, allowing you to reshape the data as per the requirements.

9.

Question 9

You have accessed the data from a SQL Server as DirectQuery. The dataset contains millions of rows. The objective of the analysis is to group data by year and region. Creating aggregated tables has the capacity to reduce the dataset sourced through DirectQuery. Which Power BI element allows you to create aggregations?

1 / 1 point

Data view of Power BI desktop

Model view of Power BI desktop

Power query editor

Page view of Power BI desktop

Correct

That’s correct! You can create aggregated tables from the DirectQuery sourced datasets from the Power Query editor and group by defined columns.

10.

Question 10

You imported an Excel workbook in Power BI, and during import, you received the following message: "We could not find any data formatted as a table." What should you do to resolve this error?

0 / 1 point

In Power BI, add an organizational app.

In the Excel workbook, select the data you want to import, create a table, and save the changes.

In Power BI, add a template app.

In the Excel workbook, select the data you want to import, select the Data validation button, and save the change.

Incorrect

Not quite. Please review the video Understanding fact and dimension tables.

11.

Question 11

You have a dataset representing each month (January, February, March) as individual columns. What transformation in the query editor can you use to rearrange the data, making months appear as rows instead of columns?

1 / 1 point

Extract

Reverse rows

Transpose

Pivot

Correct

That’s correct! The Transpose function in the query editor converts rows to columns and columns to rows.

12.

Question 12

In the Power query editor, the column statistics show a count of 1000 rows, but your query is retrieving data from a data source that contains 5000 rows. What should you do for the column statistics to show the statistics based on entire data rows?

1 / 1 point

Change the query load from Import to DirectQuery.

Create a Top N row count parameter for the query.

From the query window, select Column profiling on the entire dataset.

Add a Table.Buffer applied step using M in the query.

Correct

That’s correct! Selecting the Column profiling for the entire dataset will change the column profiler to analyze the entire query dataset.

13.

Question 13

Which Power BI component allows you to create and manage dataflows?

1 / 1 point

Power BI desktop interface

Power query from Power BI desktop

Power BI Service

Power BI data modeler

Correct

That’s correct! You can only create and manage dataflows in the Power BI service and use them from Power BI desktop.

14.

Question 14

You have a Power BI project with a large dataset. You have applied an extensive set of transformation operations to the dataset for analysis and visualization. You need to duplicate the data table for some additional analytical tasks. What transformation can you do to avoid repeating the transformation steps you already performed on the query?

1 / 1 point

Reference query from the query editor

Duplicate query from the query editor.

Duplicate the data model.

Duplicate and save Power BI file with a different name.

Correct

In reference query you can use an existing query in another query. All changes made to the primary query are automatically applied to the referenced query ensuring data consistency and avoiding the repetition of data transformation steps.

15.

Question 15

You have a Power BI data model that contains three data tables: Sales, Products, and Date.

Both the Product and Date table are related to the Sales table via one-to-many relationships. You want to analyze products sold by year. What should you do to analyze annual product sales? Select all that apply.

1 / 1 point

Set up a Both cross-filter direction between the Product and Sales tables.

Correct

That’s correct! Changing the cross-filter direction between the Product and the Sales tables will display the correct sales amount for each product sold per year.

Set up a many-to-many relationship between the Date and the Sales tables.

Set up cross filter direction to Both between Date and Sales tables.

Set up a many-to-many relationship between the Product and the Sales tables.

Use USERRELATIONSHIP to handle the cross-filter direction.

Correct

That’s correct! The use of the USERRELATIONSHIP function while defining a DAX measure will not change the cross-filter direction for the entire data model and only temporarily switch the cross-filter direction for the calculations under consideration.

16.

Question 16

You have a Power BI data model where the fact table is related to the Calendar table via multiple inactive relationships based on OrderDate, DeliveryDate, and ShipDate. How can you use the inactive relationship while defining DAX measures?

1 / 1 point

Using the USERRELATIONSHIP function.

Using the CROSSFILTER function.

Using the KEEPFILTERS function.

Managing the relationship from the Manage relationship window

Correct

That’s correct! The USERRELATIONSHIP function allows you to utilize the inactive relationship between two tables by overriding the active relationship for the current measure.

17.

Question 17

You want to create a common date table within your Power BI data model. The start and end of the date table must match the date range available in the fact table of the data model. How can you create this table?

0 / 1 point

Use the CALENDAR function and specify the dates.

Use CALENDAR with MIN and MAX to specify the dates.

Use CALENDARAUTO with MIN and MAX to specify the dates.

Use CALENDARAUTO and specify the dates.

Incorrect

Not quite. Please review the video Setting up a common date table.

18.

Question 18

Which of the following Power BI components can you use to configure the column and table properties of your data model? Select all that apply.

0 / 1 point

The Power query editor.

Correct

That’s correct! You can configure fundamental table and column properties in the query editor of Power BI desktop.

Visualizations pane of Power BI desktop.

The Model view of Power BI desktop.

Correct

That’s correct! The Model view of Power BI desktop allows you to configure and format the properties of tables and columns in depth.

Advanced editor.

This should not be selected

Not quite. Please review the activity Configuring the table and column properties.

19.

Question 19

You have implemented role-based security that restricts access to a Power BI desktop dataset for users who are assigned the role named Salespersons. You need to validate that the implementation works properly. What should you do?

1 / 1 point

In Power query editor, add a conditional column to the Salesperson table.

In the Report view, activate the view as a feature.

In the Report view, create a what-if parameter.

In the Report view, add a DAX expression filter to the Salesperson table.

Correct

That’s correct! Activating the view as a feature allows you to test the row-level security as someone with the Salesperson role.

20.

Question 20

Which of the following statements about Measures in Power BI is true? Select all that apply.

1 / 1 point

Measures can reference columns directly.

Measures are dynamic calculations that do not take space in the data model

Correct

That’s correct! Unlike Calculated columns, measures do not take up space and compute the value on the fly.

Measures can reference other measures during calculations.

Correct

That’s correct! You can reference previously computed measures to calculate the new measures.

Measures can only be created using DAX in Power BI.

21.

Question 21

You have a Power BI desktop model that contains a Sales fact table and Product dimension table. You want to compute the total sales by product category by implementing the condition: "Only products that have a total sale of over $20K should be displayed." What combination of DAX functions should you use to compute the measure?

0 / 1 point

FILTER and SUM.

FILTER and SUMX.

FILTER and CALCULATE.

SUM and CALCULATE.

Incorrect

Not quite. Please review the video Using CALCULATE with filters.

22.

Question 22

Profit margin is a non-additive measure, which DAX function should you use to handle this?

0 / 1 point

AVERAGE

FIRSTNONBLANK

SUMX

DIVIDE

Incorrect

Not quite. Please review the video Additive, semi-additive and non-additive measures.

23.

Question 23

You have a hospital emergency Power BI data model, and you want to know the emergency visits for the last 30 days. Which of the two DAX functions can you use to compute this measure? Select all that apply.

1 / 1 point

DATESINPERIOD

Correct

That’s correct! This function takes today's date as a parameter. You then need to define the number of intervals which is 30 for the current measure.

TOTALYTD

DATESBETWEEN

Correct

That’s correct! You can define the two time periods as the start and the end to compute the hospital visits.

SAMEPERIODLASTMONTH

24.

Question 24

True or False: You cannot create quick measures in Power BI service because only Power BI desktop supports the creation of quick measures.

1 / 1 point

True

False

Correct

That’s correct! Power BI service does not support the creation of quick measures. You need to go back to Power BI desktop to create a quick measure for your analysis.

25.

Question 25

You have created a data model in Power BI desktop that contains DAX-calculated columns and measures. You want to create a report from the model.

Where can you use DAX-calculated columns, without being able to use measures? Select all that apply.

1 / 1 point

As an item in the Fields well of a slicer.

Correct

That’s correct! Unlike measures, calculated columns can be used in the slicer to place filter options on the report page.

As a filter in the Filters on this visual well of the Filters pane.

As a filter in the Filters on this Page well of the Filters pane.

Correct

That’s correct! DAX measures cannot be placed in the Filters on this page well of the report.

As an item in the Add drill-through fields here well of the Visualizationpane.

26.

Question 26

You have imported a large data model to Power BI desktop, and you want to reduce the model size. Which technique should you use to reduce the model size?

1 / 1 point

Set the storage mode property of tables to DirectQuery.

Configure the Query reduction option Slicer settings.

Configure the Query reduction option filter settings.

Set the storage mode property of tables to import.

Correct

That’s correct! Setting the storage mode property to DirectQuery reduces the model size since only the schema of the data is stored locally to Power BI memory.

27.

Question 27

What are the potential performance benefits of removing unnecessary columns from the data model? Select all that apply.

0 / 1 point

Increasing the refresh speed.

Correct

That’s correct! Fewer columns mean reducing the data model size and it takes less time to refresh the model.

Decreasing report page load times.

This should not be selected

Not quite. Please review the walkthrough Optimizing a direct query model.

Increasing DAX performance.

This should not be selected

Not quite. Please review the walkthrough Optimizing a direct query model.

Reducing the size of data model.

Correct

That’s correct! Fewer columns mean there is less data to import therefore reducing the model size.

28.

Question 28

You have a Power BI data model with a bunch of complex DAX measures. The report is responding very slowly. You need to optimize the report performance for which you want to know the performance of DAX measures. Which Power BI tool can you use to inspect the performance of DAX calculations?

1 / 1 point

Visualizationpane.

Power query profiling tool.

Performance analyzer.

Power BI data Modeler.

Correct

That’s correct! In the performance analyzer, you can inspect the execution time of each DAX measure which helps you to identify the slow performing measures and optimize them.

29.

Question 29

You are planning to create a report in Power BI desktop to visualize the relationship between the number of orders received and the number of orders shipped by product category. You must identify the visual that will clearly identify the outliers in the dataset by displaying them away from the cluster of data.

Which visual should you choose?

1 / 1 point

Treemap

Scatter plot

Gauge

Card

Correct

That’s correct! A Scatter plot displays a relationship between values associated with two axes: one set of numerical data along a horizontal axis and another set of numerical data along the vertical axis. It displays outliers away from the bulk of the data.

30.

Question 30

You need to create a Power BI report visualizing the sales data of a company so that customers of similar age will be grouped together. Which type of visual should you use from the visualization pane of Power BI desktop?

1 / 1 point

A KPI

A Scatter plot

A Waterfall chart

Card visual

Correct

That’s correct! A Scatter plot is the first step of applying the clustering technique that groups data into clusters.

31.

Question 31

You have developed a CustomTheme in Power BI desktop and created reports based on this theme. When you publish your reports to Power BI service and create dashboards out of the reports, will Power BI service alter the theme and adapt your reports to the dashboard default theme?

1 / 1 point

True

False

Correct

That’s correct! You can keep the original theme of your reports and its visual elements while publishing and creating dashboards in Power BI service.

32.

Question 32

You are developing a Power BI desktop report to visualize the sales performance of salespeople. The sales team is comprised of over 20 salespeople. You also need to make sure the sales values are visualized monthly. What should you do?

1 / 1 point

Create a Column chart displaying Date hierarchy on the X-axis and create a Slicer drop-down for salespersons.

Create a Column chart displaying the month on the X-axis.

Create a Bar chart displaying the salesperson on the Y-axis.

Create a Column chart displaying salespersons on the X-axis and create a Slicer for data hierarchy.

Correct

That’s correct! Creating a Date hierarchy on the horizontal axis makes it easier to drill down to visualize the granular sales values and the slicer drop-down will interactively display the sales performance for each salesperson eliminating the clutter from the report.

33.

Question 33

When might you choose to use a Paginated report over an interactive report in Power BI?

1 / 1 point

For real-time data analysis.

When designing for mobile devices.

When you need to print the report in tabular format

For ad-hoc queries.

Correct

That’s correct! The major advantage of paginated reports is you can print all the data in a table, no matter how long it is.

34.

Question 34

True or False: Power BI allows you to add visual elements and images to your report tooltip.

1 / 1 point

True

False

Correct

That’s correct! Your report tooltip can contain visuals, images, and any other collection of items you create on the report page.

35.

Question 35

Your task is to edit a Power BI report by adjusting the behavior of report interactions. What type of interaction behavior can you change between visuals? Select all that apply.

0 / 1 point

Expand

Filter

Correct

That’s correct! A Filter changes the behavior by showing you the filtered data in the visual.

Highlight

Correct

That’s correct! Highlight is the default interaction between the visual which shows you both unfiltered and filtered values in the visual.

Drill through

This should not be selected

Not quite. Please review the video Report hierarchies.

36.

Question 36

You have a Power BI desktop report containing three pages: Main, Delayed Response, and On-time Response. You have added a Button to the Main page for navigation.

You need to implement a solution that meets the following criteria:

·        The navigation destination must change based on the output of a DAX measure name [Delayed Response].

·        If [Delayed Response] is greater than 5%, the Button must display the text “Delayed Response” and navigate to the Delayed Response page.

·        Otherwise, the Button displays the text “On-time Response” and navigates to the On-time Response page.

What actions should you perform? Select all that apply.

1 / 1 point

Set the Button type to page navigation and then use Conditional formatting to specify the destination.

Correct

That’s correct! Then you need to configure the Button to use page navigation and use the newly created DAX measure to specify the navigation.

Use Conditional formatting to set the Button text.

Correct

That’s correct! To change the Button text to match the page name, conditional formatting must be used to set the text to equal the newly created DAX measure.

Set the button type to Bookmark and then use Conditional formatting to specify the destination.

Create a DAX measure that outputs the correct page name based on the value of [Delayed response].

Correct

That’s correct! First, you need to create a DAX measure that outputs the correct destination page name.

37.

Question 37

You have a Power BI dataset where each employee is reporting to multiple managers in the organizational hierarchy. How can you handle such a situation?

1 / 1 point

Implement only the most important employee-manager relationship in your report.

Utilize the PATH DAX function to handle the organizational hierarchy.

Utilize the PATHLENGTH DAX function to handle the organizational hierarchy.

Create a separate report for each employee-manager relationship.

Correct

That’s correct! You can use the PATH function to handle parent-child hierarchy which creates a separate path for each employee-manager relationship.

38.

Question 38

The Analyze in Excel feature allows you to summarize data in Excel with a live connection. What is the maximum row limit of summarized data with a live connection?

1 / 1 point

You cannot analyze data in Excel as summarization with a live connection.

Five hundred thousand

Three hundred thousand

The same as the source dataset.

Correct

That’s correct! Power BI allows you to analyze in Excel with summarization for a maximum of five hundred thousand rows.

39.

Question 39

A Power BI desktop report needs to be optimized for cellular devices. Which Power BI component can you use to optimize the report for mobile devices? Select all that apply.

1 / 1 point

Power BI desktop

Correct

That’s correct! You can optimize reports in Power BI desktop from the view tab. Later versions of Power BI have a mobile icon on the bottom left corner of the interface.

Power BI mobile app

Power BI report builder

Power BI service

Correct

That’s correct! Power BI service also allows you to optimize your reports for cellular devices.

40.

Question 40

In Power BI you can add symmetry shading along with x- and y-axis Constant lines to which of the following visuals?

1 / 1 point

Line chart

Scatter chart

Area chart

Waterfall chart

Correct

That’s correct! You can add Constant x and y-axis lines with symmetry shading only in the Scatter chart in Power BI.

41.

Question 41

What features can you configure in the Q&A feature of Power BI desktop? Select all that apply.

0 / 1 point

Modeling

Synonyms

Correct

That’s correct! You can add synonyms for the fields present in your datasets to let Power BI Q&A understand various terms users can use to ask questions.

Relationships

Visual formatting

This should not be selected

Not quite. Please review the readings Activity: Add the Q&A feature to a dashboard and Activity Using the Q&A feature for reports.

Review Questions

Correct

That’s correct! You can review the questions users have asked about your data and you can fix the misunderstanding for better user experience.

42.

Question 42

In Power BI where can you find time series charts?

0 / 1 point

The Fields pane contains the time series charts.

In the Filter pane of Power BI Desktop.

Time series charts are in the Visualizations pane.

You need to import time series charts from AppSource.

Incorrect

Not quite. Please review the reading Activity: using the Play axis visualization.

43.

Question 43

You manage a Power BI workspace. You need to delegate the task to schedule data refreshes. The solution must use the principle of least privilege. Which role should you use?

1 / 1 point

Contributor

Viewer

Admin

Member

Correct

That’s correct! The Contributor role is the least privileged role that grants permission to schedule data refreshes.

44.

Question 44

You have a Power BI data model from which you need to create reports and dashboards. In which scenario do you need a dashboard for a report in Power BI?

1 / 1 point

You need to add filters.

You need to add slicers.

You need to display visuals from multiple pages.

You need to display visuals that use different datasets.

Correct

That’s correct! Power BI dashboards can combine data from multiple datasets and do not support reports.

 

45.

Question 45

You want to create Alerts to notify users if the data on the dashboard changes above or below a certain threshold. Which Power BI visual allows you to set and manage Alerts in Power BI service? Select all that apply:

1 / 1 point

Python visual

KPI

Correct

That’s correct! Power BI service also allows you to set and manage Alerts in KPI, a visual used to track performance against a predefined target.

Custom visuals

Gauge

Correct

That’s correct! You can set up and manage Alerts in the Gauge visual, within the Power BI service.

Card visual

Correct

That’s correct! The Card visual is the third visual element where you can set and manage Alerts within the Power BI service.

46.

Question 46

True or False: Only Power BI administrators can promote content in Power BI service.

1 / 1 point

True

False

Correct

That’s correct! Any content owner or user with the Write permission can promote the content in Power BI Service.

47.

Question 47

What is the primary advantage of deployment pipelines in Power BI?

1 / 1 point

Less manual work and fewer errors.

Semantic model (dataset) creation is streamlined.

Reports can be published from multiple workspace environments.

Enhanced user access to BI report source data.

Correct

That’s correct! Implementation of deployment pipelines reduces manual work and errors.

48.

Question 48

You are creating and managing dataflows for your organization. The company’s data is hosted in on-premises SQL Server.

True or False: To create the dataflows, you do not need to install and configure data gateways.

1 / 1 point

True

False

Correct

That’s correct! To create dataflows in Power BI service, you must install and configure data gateway to retrieve data from on-premises SQL server to the dataflows.

49.

Question 49

You have applied changes in the data source structure including renaming, remove, and add columns.

True or False: The refresh can only be applied to Power BI desktop.

1 / 1 point

True

False

Correct

That’s correct! If you delete, add, or rename a column in the table structure of schema, the changes only can be applied to Power BI desktop upon data refresh.

50.

Question 50

Which of the following security groups cannot add to row-level security in Power BI?

0 / 1 point

Mail-enabled group

Distribution group

Azure Active Directory Security Group

Microsoft 365 Group

Incorrect

Not quite. Please review the video Row level security.


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