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Microsoft Power BI Data Analyst Professional Certificate (PL-300) : Sample Questions (Part-6)

12:15 PM

 



Part-5

1.

Question 1

For the sales department of your organization, you publish a report that imports data from Microsoft Excel located in a Microsoft SharePoint folder. The data model contains several DAX measures. You must create a Power BI report from the existing data with minimal development efforts. Which type of data source should you use?

1 / 1 point

A Power BI dataset

A SharePoint folder

Power BI dataflows

An Excel workbook

Correct

That’s correct! You must select the SharePoint folder from the Get Data and paste the SharePoint site URL where the data is hosted.

2.

Question 2

You need to create a data source that external users can access. Which type of data source should you use?

1 / 1 point

SQL Server

Common data services

OneDrive

SharePoint

Correct

That’s correct! Common data services allow users to securely store and manage data from various sources, including Office 365 and custom applications. It is a suitable option for creating data sources that external users can access because it provides a secure and scalable platform for managing data.

3.

Question 3

Which tool should you use to create a custom connector to access data from a third-party API?

1 / 1 point

Power BI

Power Automate

Power Query

Power Apps

Correct

That’s correct! You can use Power query to create and manage a custom connector to retrieve data from third-party API.

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

Break down the SQL statement into separate data sources.

Implement groupings in SQL statement.

Replace subqueries with nested queries.

Implement aggregations 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

How can you ensure data accuracy before analysis?

1 / 1 point

Use data visualization tools

Using data profiling tools

Use data modeling tools

Use data transformation tools

Correct

That’s correct! Data profiling tools are designed to analyze and assess the data quality and help identify any data inconsistencies, errors, and missing data in the datasets.

6.

Question 6

Your data model contains a huge dataset that you want to reduce. Which Power BI interface can you use to reduce the data?

1 / 1 point

Data modeler.

Advanced editor.

Data view of Power BI desktop.

Power query editor.

Correct

That’s correct! In the Power query editor, you can remove unnecessary columns and rows, duplicates, and enact other transformation steps to reduce the size and volume of the dataset before loading it to the Power BI model.

7.

Question 7

You have two Excel sheets with data from separate reporting units. Both spreadsheets contain the same column names and structure. What Power query editor feature will you use to create a unified dataset?

1 / 1 point

Group

Append

Merge

Manage

Correct

That’s correct! Append queries allow you to combine two tables with similar column names and structures into a single unified data table.

8.

Question 8

How can you filter rows in Power BI based on specified conditions during data transformation?

1 / 1 point

Apply the remove rows transformation operation.

Utilize the Sort option.

Apply the Exclude values transformation.

Use Filter rows and specify the conditions.

Correct

That’s correct! In the power query editor, you can use Filter rows and define the conditions to filter rows based on your required conditions.

9.

Question 9

You want to add a new column to the Power BI table that categorizes customers as high value if their total sales are above $10,000. Which transformation in the query editor allows you to create such a column without using the DAX expression?

1 / 1 point

Custom column

Conditional split

Group by

Extract

Correct

That’s correct! In the query editor, you can add a custom column and define the conditions for the column based on the sales values for each customer.

10.

Question 10

You are designing a data model for hospital emergency visits. You want to capture patient information like name, address, insurance details, email, and phone number. Which type of table should you store this information?

1 / 1 point

Measure table

Fact table

Dimension table

Look up table

Correct

That’s correct! The information about the patients is descriptive in nature therefore should be stored in the dimension table that will provide context for the fact table of the data model.

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

Reverse rows

Transpose

Extract

Pivot

Correct

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

12.

Question 12

You developed a query in Power BI desktop that retrieves data from an Excel spreadsheet. During the data analysis, you identify the need to view and modify multiple steps of data transformation in the entire M code. Which Power BI interface allows you to accomplish that?

0 / 1 point

Advanced editor of Power query editor

The Model view of Power BI desktop.

The Formula bar of the query editor.

The Power query editor.

Incorrect

Not quite. Please review the video Profiling Data in Power BI.

13.

Question 13

You are importing data from a SQL Server database that contains two tables named SalesOrderDetails (left table) and SalesOrders (right table). You load both tables to Power BI desktop and the tables have a relationship based on theSalesOrderID column. You need to combine two tables into one and you must meet the following requirements:

·        There is a row for every SalesOrderDetails row in the resulting table, even if there is no corresponding SalesOrder row.

·        For every SalesOrderDetails row, the row in the resulting table includes the corresponding SalesOrder row data if the SalesOrder exists.

·        Any SalesOrder row data that does not have a corresponding SalesOrderDetailsrow is not included in the resulting table.

What should you do to combine the tables?

1 / 1 point

Merge the tables using left outer join kind based on the SalesOrderID.

Merge the tables using inner join based on the SalesOrderID.

Append the tables.

Merge the tables using full outer join kind based on the SalesOrderID.

Correct

That’s correct! To meet the requirements, the resulting table must contain all the rows from the SalesOrderDetails table with only matching rows from the SalesOrder table. This can be achieved by using a left outer join type while merging the tables.

14.

Question 14

What happens when you make changes to the source query of a referenced query in Power BI?

1 / 1 point

The changes are automatically applied to all referencing queries

The reference queries do not change.

The changes only affect the current report.

The referencing queries become read-only.

Correct

That’s 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 containing two tables Sales and Employees. The tables are related via a one-to-many relationship based on the EmployeeID column. You want to analyze the sales performance for each employee. Which cross-filter direction will you choose?

1 / 1 point

None

Both

Single

Correct

That’s correct! To analyze sales performance for each employee, you need to set a single cross-filter direction which ensures selecting an employee will filter the sales amount for that employee.

16.

Question 16

Your Power BI data model has a Sales fact table and a Date table. The Sales table contains two date columns: ShipDate and OrderDate.

Both date columns have a relationship to the Date column in the Date table, and DAX measures have been defined to use these relationships for calculations related to order date or ship date.

You need to make sure that the Date table does not filter the Sales table unless it is using DAX measures that use these relationships. What should you do?

1 / 1 point

Enable Make this relationship active for both relationships.

Enable a security filter in both directions for both relationships.

Set the cross-filter direction to Both for both relationships.

Disable Make this relationship active for both relationships.

Correct

That’s correct! In the Power BI data model, you can have multiple inactive relationships between two tables. DAX measures use the USERRELATIONSHIP function to compute the required analysis by activating the relationship necessary for the calculation.

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?

1 / 1 point

Use CALENDARAUTO 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 the CALENDAR function and specify the dates.

Correct

That’s correct! In the CALENDAR function, you can use MIN and MAX functions to extract the minimum and maximum dates from the fact 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.

1 / 1 point

Visualizations pane of Power BI desktop.

Advanced editor.

The Power query editor.

Correct

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

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 the Report view, activate the view as a feature.

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

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

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

You have a Power BI data model containing a Sales table. The Sales table has Quantity and Unit price columns. You want to create a Total sales measure instead of a calculated column by optimizing the data model for storage. Which aggregation function will you use to compute the measure?

1 / 1 point

SUM

CALCULATE and SUM

CALCULATE

SUMX

Correct

That’s correct! SUMX will iterate each row of the table to compute the total sales by implementing the calculations of the measure.

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?

1 / 1 point

FILTER and CALCULATE.

FILTER and SUM.

SUM and CALCULATE.

FILTER and SUMX.

Correct

That’s correct! The FILTER function narrows down the sales values for the product according to the defined criteria and CALCULATE modifies the filter context to compute the final measure.

22.

Question 22

You have a warehouse Power BI data model that contains a table named Warehouse. The table has a column named Inventory count, which contains the current number of items for each row of a particular product type on a given day.

The model has a DAX measure that calculates the sum of all values in the Inventory count column of the Warehouse table:

Current Inventory =

CALCULATE ( SUM ( ‘Warehouse’[Inventory Count] ) )

You must ensure that Current Inventory returns only the current total number of inventory items, rather than the sum of all inventory items.

What additional DAX function should you include in the query?

1 / 1 point

DISTINCTCOUNT

CALENDARAUTO

LASTDATE

CALENDAR

Correct

That’s correct! The LASTDATE function ensures that the SUM function applies only to the last date of the period resulting in a semi-additive behavior.

23.

Question 23

You have a Power BI model of a marketing company. The data model contains two tables: Socials and Calendar. The Socials table has a column recording website visits and the Calendar table has a Date column.

You want to compute the total number of visits during the last month. Which DAX expression can you use to compute this value?

1 / 1 point

= CALCULATE ( SUM ( Socials[Website Visits] ), LASTMONTH ( Calendar[Date] ) )

= CALCULATE ( SUM ( Socials[Website Visits] ), PREVIOUSMONTH ( Calendar[Date] ) )

= CALCULATE ( Socials[Website Visits] ), LASTMONTH ( Calendar[Date] )

= CALCULATE ( Socials[Website Visits] ), PREVIOUSMONTH ( Calendar[Date] )

Correct

That’s correct! CALCULATE and SUM computes the total number of website visits and PREVIOUSMONTH compares the dates to the previous month.

24.

Question 24

You are working on a Power BI data model that contains three data tables. A Salestable containing sales transactions, a Date table, and a Producttable.

You want to create a summary table to display the following:

·        The total sales by each product category per year.

·        Total quantity of each product within the category.

You have created the following DAX measure:

Annual Sales Summary =

ADDCOLUMNS (

SUMMARIZE ( Sales, Date.[Year], 'Product'[Category] ),

"Total Quantity", SUM ( Sales[Quantity] ) )

)

Which of the following DAX functions you should include in the DAX expression to compute accurate results?

1 / 1 point

TOPN

FILTER

CALCULATETABLE

CALCULATE

Correct

That’s correct! You need to add CALCULATE before SUM to compute accurate results. Remember CALCULATE alters the filter context of the DAX calculations.

25.

Question 25

A Power BI data model has measures and calculated columns. What is the benefit of using measures over calculated columns?

1 / 1 point

Measures can be used for data transformation operations.

Measures can assist in data load operations.

Measures can be used in the calculated columns to create complex calculations.

Measures are dynamic calculations and are not stored in the data model.

Correct

That’s correct! Measures are calculated at the query level, so they do not require memory. The calculations are executed on the fly.

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.

Set the storage mode property of tables to import.

Configure the Query reduction option Slicer settings.

Configure the Query reduction option filter settings.

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

True or False: You have imported a Power BI data model from a huge Excel spreadsheet. You need to create aggregations to improve model performance but creating and managing aggregations is limited to DirectQuery sourced datasets.

1 / 1 point

True

False

Correct

That’s correct! You can create and manage aggregations for model optimization based on any dataset even if it is an Excel workbook.

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

Power BI data Modeler.

Power query profiling tool.

Visualizationpane.

Performance analyzer.

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 creating a report to visualize sales by salespersons, trending over months. The visual must clearly show how salespersons are performing against each other and have a ranking for each period.

Which visual from Power BI core visualization should you choose?

1 / 1 point

Ribbon chart

Treemap

Scatter plot

Clustered bar chart

Correct

That’s correct! A Ribbon chart places the highest value at the top of the stacked column each month and shows those ranked changed over time, so it’s the best option to fulfill the requirements.

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 Waterfall chart

Card visual

A KPI

A Scatter plot

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 the month on the X-axis.

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

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

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

You are using Power BI desktop to configure a Stacked column chart that displays gross sales data with Date hierarchy. The hierarchy levels are Year, Quarter, Month, and Day. You need to prevent users from viewing the hierarchy based on the Year. What should you do?

0 / 1 point

In the Format pane, modify the maximum range settings.

In the Visualizations pane, remove the Year from the Date hierarchy field in the horizontal axis

In the Filters pane, add a filter based on the Year.

In the Filters pane, add a filter based on the Quarter, Month, and Day.

Incorrect

Not quite. Please review the video Pagination and exporting reports.

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

In Power BI desktop, what types of fields can you use to create a data hierarchy enabling users to drill down to granular details of analysis?

1 / 1 point

Hierarchies can only be created with Data/time data fields

Only numerical values

Only text-based data

Both categorical and numerical data fields can be used

Correct

That’s correct! To create a hierarchical structure and enable the drill-down function, you can use both numerical and categorical data fields in your visuals.

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

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.

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 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.

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

37.

Question 37

A fundamental principle of data storytelling is a cohesive report page and visuals should be placed in a logical order. Which Power BI element allows you to visualize the order of visuals in the report page and configure them according to the narrative of your data story?

1 / 1 point

Selection pane from the query editor.

Page navigator from Power BI desktop.

Selection pane from Power BI desktop.

Visualizations pane of Power BI desktop.

Correct

That’s correct! The Selection pane of Power BI desktop enlists all the visuals present in the report canvas, where you can simply re-arrange the visuals by dragging and dropping them in an order that complements your data story.

38.

Question 38

How can you group layers of visual elements in your Power BI desktop report? Select all that apply.

1 / 1 point

Right-click on any visual and select Group from the context menu

Select all visuals to be grouped, right-click on any visual, and select Group from the context menu.

Correct

That’s correct! You need to select multiple visuals to be grouped by holding the Ctrl key and selecting Group from the context menu.

Select all visuals to be grouped, navigate to the Format ribbon, and select Group.

Correct

That’s correct! You can also navigate to the Format ribbon and select Groupafter selecting the multiple visuals from the report canvas.

Drag and drop the visual elements.

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 report builder

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 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

Area chart

Scatter chart

Waterfall chart

Line 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

True or False: In Power BI desktop, you can convert a Q&A visual to a fully formatted visual element to display on your report canvas.

1 / 1 point

True

False

Correct

That’s correct! You can also define relationships between tables and fields to help Q&A understand questions about your data.

42.

Question 42

AI visuals are Power BI components designed to provide advanced analytics and insights by leveraging machine learning models and techniques. You are a sales manager of the company and want to analyze the revenue by region, category, and sales channel. Which of the following AI visuals is used to break down a specific value (revenue in this case) into its components?

1 / 1 point

Q&A visual

Key influencer visual

Decomposition tree

Waterfall chart

Correct

That’s correct! With the Decomposition tree, AI visual of Power BI, you can break down a single value into its components like Sales revenue into regions, categories, and sales channels which can reveal the strengths and weaknesses of your business operation.

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

Member

Viewer

Admin

Correct

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

44.

Question 44

Which of the following features are not supported in Power BI dashboards? Select all that apply.

0 / 1 point

Natural language queries

Creation of multiple pages

Setup of data Alerts

This should not be selected

Not quite. Please review the video What is a dashboard?

Use of slicers and filters

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

Gauge

Correct

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

Python visual

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.

Custom visuals

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.

46.

Question 46

Sensitivity labels are a way to classify critical content and protect your sensitive data without losing productivity. Which of the following components can you apply Sensitivity labels to in Power BI Service? Select all that apply:

1 / 1 point

Workbooks

Dataflows

Correct

That’s correct! Dataflows support the use of sensitivity labels in Power Bi service.

Paginated reports

Correct

That’s correct! Paginated reports support the use of sensitivity labels in Power Bi service.

Semantic models (Datasets)

Correct

That’s correct! Semantic models support the use of sensitivity labels in Power Bi service.

47.

Question 47

What feature in Power BI service can you use to troubleshoot the flow of data from the source to destination?

1 / 1 point

Query caching

Quick insights

Usage metrics report

Lineage view

Correct

That’s correct! Lineage view in Power BI service allows you to view and troubleshoot the data flow from its source to destination.

48.

Question 48

Your company has a SharePoint server located in a data center in Toronto. You are creating a report in Power BI service that uses Microsoft Excel files stored on the SharePoint server. You need to recommend a solution to ensure that the dataset for the report can automatically refresh daily. What should you include in the recommendation?

0 / 1 point

An on-premises data gateway

Azure Data box

A virtual private network (VPN)

Incorrect

Not quite. Please review the video Data gateways.

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.

0 / 1 point

True

False

Incorrect

Not quite. Please review the activity Configure a dataset scheduled refresh.

50.

Question 50

You are applying sensitivity labels to your Power BI reports, which of the following are sensitivity labels in Power BI? Select all that apply.

0 / 1 point

Certified

Confidential

Correct

That’s correct! Confidential is a sensitivity label used for Power BI reports.

Personal

Highly confidential

Correct

That’s correct! Highly confidential is a sensitivity label used for Power BI reports.

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