Power BI - PL 300 - Pt 2 Flashcards
You have a table ‘Sales’ that contains the columns ‘SalesID’, ‘Number_of_Units’, ‘PurchaseValue’, and ‘DiscountRate’. You want to calculate the minimum number of units that have been sold. Identify the correct formula that can be used.
A. MinOrder = MIN(Sales[‘Number_of_Units’])
B. MinOrder = MIN(Sales[Number_of_Units])
C. MinOrder = MINIMUM(Sales[Number_of_Units])
D. MinOrder = MINIMUM(Sales[‘Number_of_Units’])
B. MinOrder = MIN(Sales[Number_of_Units])
You have a table ‘Sales’ that contains the columns ‘SalesID’, ‘Number_of_Units’, ‘PurchaseValue’, and ‘DiscountRate’. You want to calculate the Top 5 purchases based on the PurchaseValue. Identify the correct option that can be used.
A. Use the Q&A visual to identify the Top 5 PurchaseValue
B. Use the TOPN DAX function
C. Use the TOPN filter type
D. Use any of the three -TOPN DAX function, TopN filter type or Q&A visual
D. Use any of the three -TOPN DAX function, TopN filter type or Q&A visual
What does the “Analyze” feature assist users with?
A. Conducting Time Series analysis
B. Reviewing Quick Insights
C. Exploring statistical summary
D. Identifying outliers with visuals
D. Identifying outliers with visuals
The Analyze feature helps users identify and highlight outliers in the data using various visuals and interactive capabilities.
It does not specifically assist with time series analysis but provides insights and outlier identification.
Quick insights are generated automatically by Power BI, while the Analyze feature allows manual exploration of data insights.
Exploring statistical summary is done through various visuals, but the Analyze feature does not specifically focus on this.
Which technique can be used to identify natural groupings within a dataset?
A. Grouping
B. Binning
C. Clustering
D. Time Series Analysis
C. Clustering
What is the primary benefit of using the Key influencers visual in Power BI?
A. Discovering data anomalies
B. Creating data hierarchies
C. Identifying data correlations
D. Finding important factors impacting a measure
D. Finding important factors impacting a measure
The primary benefit of the Key influencers visual is to identify and display the important factors that significantly impact a specific measure.
The Key influencers visual does not create data hierarchies but instead identifies the most influential factors impacting a measure.
While Key influencers can identify influential factors , it does not explicitly focus on identifying data correlations or discovering data anomalies.
In the Decomposition Tree visual, what does each level of the tree represent?
A. Hierarchical categories
B. Individual data points
C. Aggregated data summaries
D. Statistical significance of factors
A. Hierarchical categories
Each level of the tree represents hierarchical categories, allowing users to break down the measure into its contributing factors in a structured manner.
The Decomposition Tree visual does provide aggregated data summaries, but that is not the primary representation at each level.
The Decomposition Tree visual focuses on hierarchical representation rather than the statistical significance of factors.
How can users interact with the Q&A visual in Power BI to explore data insights?
A. Drag and drop data fields
B. Apply clustering techniques
C. Set up scheduled data refresh
D. Access advanced analytics custom visuals
A. Drag and drop data fields
Users can interact with the Q&A visual by asking natural language questions and exploring data insights through the use of specific data fields
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
The Column quality checks the quality of the data in terms of Valid, Error & Empty and is expressed as a percentage.
You discover a quality data source on your company’s Azure SQL database. You decide to connect using a direct query to the database. What two things are necessary to successfully connect?
A. Specify the fully qualified server name when connecting
B. Ensure firewall rules for the database are configured to “allow access to Azure services”
C. Select automatic schema change detection
D. Tiles are refreshed once per day, so you must configure the scheduled refresh
A. Specify the fully qualified server name when connecting
B. Ensure firewall rules for the database are configured to “allow access to Azure services”
You must specify the full server name when connecting to the Azure SQL database. You can find your fully qualified server name and database name in the Azure portal. Make sure you have configured the firewall rules to ‘allow access to Azure service’ or you may not be able to access your database.
You work for a microbrewery as head of data visualization. You have a Power BI data model that relies on several Excel files that reside on your company’s internal server.
You are emailed a new Excel workbook from the CEO that contains updated data. You place the new Excel workbook on your server and append the text ‘v1.2’ to the name.
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
- The new excel file must have the same structure as the original workbook. (Y/N)
- The new excel workbook will only work if it has the exact same name and path as the previous file. (Y/N)
- You can refresh the local Excel file by pressing F5 in Power BI. (Y/N)
- Yes
- No
- No
The new Excel file must have the same schema as the original Excel file. If there are fewer columns, more columns or differently named columns, the report will not work.
The new file can have a different name and a different file path. In Power Query Editor, you can change the source path and filename for the new file.
You cannot refresh the local Excel file by pressing F5 in Power BI. If you need to be able to refresh the data for reports published to Power BI Server, you will need a data gateway. Otherwise, you can host the file on a cloud platform such as OneDrive.
Which term best describes the process of transforming a table by turning distinct column values into rows?
A. Pivot
B. Unpivot
C. Transpose
D. Select Columns
B. Unpivot
What is the function of Pivot in Power BI
Pivot turns rows into columns by splitting unique values from the selected column into additional columns. In general, to pivot means to turn or rotate around a central point.
https://medium.com/@faith_oseghale/transpose-pivot-and-unpivot-in-power-query-29d674c08dcc
What is the function of unpivot in Power BI
It’s a data transformation function that converts data from a wide format (columns) to a long format (rows), essentially turning column headers into rows
https://medium.com/@faith_oseghale/transpose-pivot-and-unpivot-in-power-query-29d674c08dcc
What is the function of Transpose in Power BI
Transpose changes the orientation of the table without rearranging the values.
https://medium.com/@faith_oseghale/transpose-pivot-and-unpivot-in-power-query-29d674c08dcc
What is the function of Select Columns in Power BI
Select columns allows us to select desired columns from the dataset
Column 1 data points: 1, 2, 3, 4, 5, 1, 2, 3
You have connected to a data source and column 1 contains the data points (numbers) noted above. You switch on Column distribution in the Data Preview section of the View menu.
What values for distinct and unique are returned for Column 1?
5 distinct, 2 unique
You work for an eCommerce company that sells ergonomic office products. You are tasked with creating a Power BI report from your company’s transactional sales data in a table called ‘ergoSales’. Before you do anything with the data, you want to check that there are no negative amounts in the ‘ergoSales’[quantity] field.
What is the most efficient way to check your data for negatives before creating the data model?
A. Select Column Profile and click on ‘ergoSales’[quantity]
B. Select Column Quality and click on ‘ergoSales’[quantity]
C. Click on ‘ergoSales’[quantity] and select Replace Values
D. Create a custom column using a conditional statement to filter negatives out
A. Select Column Profile and click on ‘ergoSales’[quantity]
The Column profile view shows a column distribution chart of values as well as the minimum and maximum values. You can quickly see if your data has negative values by checking the distribution or by viewing the minimum value.
When connecting to an Excel workbook in Power BI, what does the “Enable Load” option do?
A. Loads the entire workbook into Power BI
B. Enables loading specific worksheets from the workbook
C. Allows data transformations within Power Query
D. Disables loading data from the workbook
B. Enables loading specific worksheets from the workbookB. Enables loading specific worksheets from the workbook
The “Enable Load” option allows you to choose specific worksheets from the Excel workbook to load into Power BI. “Enable Load” allows for selective loading of worksheets.
What is the difference between a calculated column and a measure?
A. A calculated column is created using DAX, while a measure is created using M Formula
B. A calculated column is stored in memory, while a measure is calculated on-the-fly
C. A calculated column can only be used in visuals, while a measure can be used in both visuals and tables
D. A calculated column can only be used for aggregation, while a measure can be used for both aggregation and filtering
B. A calculated column is stored in memory, while a measure is calculated on-the-fly
You are a Power BI consultant and you are doing some remote work for a mining company in Western Australia. You need to build a date table that starts from November 2010 and ends in December 2025. You decide you will use DAX to create a table.
How should you create the DAX expression?
A. DATE(2010/11/01, 2025/12/31)
B. CALCULATE(CALENDAR(‘2010/11/01’, ‘2025/12/31’)
C. CALENDAR(DATE(2010,11,30), DATE(2025,12,01))
D. CALENDAR(2010/11/01, 2025/12/31)
C. CALENDAR(DATE(2010,11,30), DATE(2025,12,01))
Use the CALENDAR function with a start and end date. For each date, use the DATE function and add in the three parameters for year, month and day.
What is the purpose of using hierarchies in a data model?
A. To improve performance by reducing the amount of data that needs to be processed
B. To enable drill-down and drill-up functionality in visualizations
C. To link tables together based on common columns
D. To import data from external sources
B. To enable drill-down and drill-up functionality in visualizations
You have a dashboard that is an important part of collaborative planning in your organization. Since the team is remote, you have been asked to allow users to provide feedback on the dashboard that will be visible to other team members.
How would you achieve this goal?
A. Add sticky notes
B. Add comments
C. Add to group mail
D. Add alerts
B. Add comments
Comments can be added to an entire dashboard, to individual visuals on a dashboard and can be seen by colleagues. Additionally, when you add a comment to a report, Power BI captures the current filter and slicer values and creates a bookmark. This means that when you select or respond to a comment, the report page or report visual may change to show you the active filter and slicer selections when the comment was first added
You work for a consulting company that has a contract with a large government department. Part of the requirements for the report is to configure the page for use with a screen reader for sight-impaired users.
What should you configure in your report such that the page follows a logical sequence?
A. Bookmarks
B. Layer order
C. Tab order
D. Filter on all pages
C. Tab order
The tab order is used by keyboard users to navigate the report page. Screen reader and accessibility software follow the sequence of the tab order.
What are some best practices for Tab Order?
- Logical Flow: Arrange items in a natural order, such as left-to-right and top-to-bottom, to match the layout of the report.
- Focus on Key Elements: Prioritize interactive elements like slicers, filters, and buttons early in the order.
- Avoid Redundancy: Exclude decorative shapes, images, or elements that do not need to be interacted with.
- Test Navigation: Use the Tab key to navigate through the report and ensure the sequence feels intuitive.
- Assistive Technology: Test with screen readers or other accessibility tools to verify usability