Microsoft PL-300 Practice Test - Questions Answers, Page 12
List of questions
Question 111
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You need to design the data model to meet the report requirements. What should you do m Power Bl Desktop?
From Power Query, add columns to the Orders table to calculate the calendar quarter and the calendar month of the OrderDate column.
From Power Bi Desktop, use the Auto date/time option when creating the reports.
From Power Query, add a date table. Create an active relationship to the OrderDate column in the Orders table and an inactive relationship to the ShippedDate column in the Orders table.
From Power Query, use a DAX expression to add columns to the Orders table to calculate the calendar quarter of the OrderDate column, the calendar month of the OrderDate column, the calendar quarter of the ShippedDate column, and the calendar month of the ShippedDate column
Question 112
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You need to create the Top Customers report.
Which type of filter should you use, and at which level should you apply the filter? To answer, select the appropriate options in the answer area. NOTE; Each correct selection is worth one point.
Explanation:
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Answer as below
Question 113
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You need to create a relationship in the dataset for RLS.
What should you do? To answer select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Explanation:
.
Answer as below
Question 114
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You need to create a measure that will return the percentage of late orders.
How should you complete the DAX expression? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.
Explanation:
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Answer as below
Question 115
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ion have a Power BI dataset that contains a table named Temperature Readings. Temperature Readings contains the columns shown in the following table.
The table has 12 million rows. All the columns are needed for analysis.
You need to optimize the dataset to decrease the model size. The solution must not affect the precision of the data. What should you do?
Split the DateTime column into separate date and time columns.
Disable the Power Query load.
Round the Longitude column two decimal places.
Change the data type of the TempCelsius column to Integer
Explanation:
Disable Power Query load.
Power Query queries that are intended support data integration with other queries should not be loaded to the model. To avoid loading the query to the model, take care to ensure that you disable query load in these instances.
Reference:
https://docs.microsoft.com/en-us/power-bi/guidance/import-modeling-data-reduction#disablepower-query-query-load
Question 116
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In Power Bi Desktop, you are creating visualizations in a report based on an imported dataset You need to allow Power Bi users to export the summarized data used to create the visualizations but prevent the users from exporting the underlying data What should you do?
From Power BI Desktop, configure the Data Load settings for the current file.
From the Power BI service, configure the dataset permissions.
From Power BI Desktop, configure the Report settings for the current file.
From Power BI Desktop, modify the data source permissions.
Explanation:
https://learn.microsoft.com/en-us/power-bi/visuals/power-bi-visualization-export- data?tabs=powerbi-desktopThe export functionality can be disabled on several levels. First, Power BI Service admins can disable this functionality on tenant level. With that, nobody will be able to export the data. More about that later. Second, as a dataset owner you can decide if you allow your users to export the data. This is managed in dataset settings, but only changeable in Power BI desktop.No matter what settings are applied in Power BI desktop, the tenant settings will overrule this. In the end the Power BI Service admin decides what options are possible to use.https://data-marc.com/2020/04/13/power-bi-governance- why-you-should-consider-to-disable- export-to-excel/
Question 117
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You have a Power BI report. The report contains visualizations that have interactions. You need to identify which visualizations take the longest to complete. What should you use?
SQL Server Profiler
Performance Analyzer in Power BI Desktop
Query Diagnostics in Power BI
Microsoft Edge DevTools
Explanation:
Use Power BI Desktop Performance Analyzer to optimize reports.
In Power BI Desktop you can find out how each of your report elements, such as visuals and DAX formulas, are performing. Using the Performance Analyzer, you can see and record logs that measure how each of your report elements performs when users interact with them, and which aspects of their performance are most (or least) resource intensive.
Reference:
https://docs.microsoft.com/en-us/power-bi/create-reports/desktop-performance-analyzer
Question 118
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You are building a Power BI report to analyze customer segments.
You need to identify customer segments dynamically based on the Bounce Rate across dimensions such as source, geography, and demographics. The solution must minimize analysis effort. Which type of visualization should you use?
decomposition tree
funnel chart
Q&A
key influencers
Explanation:
The key influencers visual is a great choice if you want to:
See which factors affect the metric being analyzed.
Contrast the relative importance of these factors. For example, do short-term contracts affect churn more than long-term contracts? Note: The key influencers visual helps you understand the factors that drive a metric you're interested in. It analyzes your data, ranks the factors that matter, and displays them as key influencers. For example, suppose you want to figure out what influences employee turnover, which is also known as churn. One factor might be employment contract length, and another factor might be commute time. https://docs.microsoft.com/en-us/power-bi/visuals/power-bi-visualization-influencers
Question 119
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You have sales data in a star schema that contains four tables named Sales, Customer, Date, and Product. The Sales table contains purchase and ship dates. Most often, you will use the purchase date to analyze the data, but you will analyze the data by both dates independently and together. You need to design an imported dataset to support the analysis. The solution must minimize the model size and the number of queries against the data source. Which data modeling design should you use?
Use the Auto Date/Time functionality in Microsoft Power Bl and do NOT import the Date table.
Duplicate the Date query in Power Query and create active relationships between Sales and both Date tables in the modeling view.
On the Date table, use a reference query in Power Query and create active relationships between Sales and both Date tables in the modeling view.
Import the Date table twice in Power Query and create active relationships between Sales and both Date tables in the modeling view.
Explanation:
Microsoft recommends defining active relationships whenever possible. They widen the scope and potential of how your model can be used by report authors, and users working with Q&A. Refactoring methodology (example): Here's a methodology to refactor a model from a single roleplaying dimension-type table, to a design with one table per role. Remove any inactive relationships.
Consider renaming the role-playing dimension-type table to better describe its role. In the example, the Airport table is related to the ArrivalAirport column of the Flight table, so it's renamed as Arrival Airport. Create a copy of the role-playing table, providing it with a name that reflects its role. If it's an Import table, we recommend defining a calculated table. If it's a DirectQuery table, you can duplicate the Power Query query. Only one relationship can be active.
Note: If you query two or more tables at the same time, when the data is loaded, Power BI Desktop attempts to find and create relationships for you. The relationship options Cardinality, Cross filter direction, and Make this relationship active are automatically set.
Reference:
https://docs.microsoft.com/en-us/power-bi/transform-model/desktop-create-and-managerelationships
https://docs.microsoft.com/en-us/power-bi/guidance/relationships-active-inactive
Question 120
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In Power BI Desktop, you are building a sales report that contains two tables. Both tables have rowQuestions & Answers PDF P-145 level security (RLS) configured. You need to create a relationship between the tables. The solution must ensure that bidirectional cross-filtering honors the RLS settings. What should you do?
Create an active relationship between the tables and select Assume referential integrity.
Create an inactive relationship between the tables and select Assume referential integrity.
Create an inactive relationship between the tables and select Apply security filter in both directions.
Create an active relationship between the tables and select Apply security filter in both directions.
Explanation:
By default, row-level security filtering uses single-directional filters, whether the relationships are set to single direction or bi-directional. You can manually enable bi-directional cross-filtering with rowlevel security by selecting the relationship and checking the Apply security filter in both directions checkbox. Select this option when you've also implemented dynamic row-level security at the server level, where row-level security is based on username or login ID.
Reference:
https://docs.microsoft.com/en-us/power-bi/admin/service-admin-rls
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