PowerBI Certification Exam

PowerBI Certification Exam If you want your data to automatically refresh as you interact with visualizations, which option should you choose? A) Import B) DirectQuery - B) DirectQuery Explanation: When you use DirectQuery, no data is imported into Power BI Desktop. As you create or interact with a visualization, PowerBI Desktop queries the underlying data source, i.e. you're always viewing current data. How do you connect to Excel files that contain target figures? The solution should involve minimum manual work when new Excel files are created. A) Connect to the files with Folder connector and use the Combine Binaries functionality. B) Connect to a new file each month, perform transformations, and use Append function in Power Query Editor to combine all targets in the same table. - A) Connect to the files with Folder connector and use the Combine Binaries functionality. Explanation: Connecting to files separately will take time if there are lots of files in the folder. Its always better to connect to folder if files have same structure. If you copy new files in that folder with same structure, that file will be loaded automatically without doing any change to data sources. Imagine that you have created a query named "Customers" in a PowerBI Desktop to append the rowss from three external tables with customer data into a single output table named "Customers". What would be the best approach to add a new fabricated ID column to the Customers table to ensure that every row in the "Customers" table contains a unique ID value? A) Modify the Customer query by adding a counter column. B) Modify the data model by extending the Customers table with a Counter column. C) Modify the customers query by adding an index column. D) Modify the data model by extending the Customers table with an index column. - C) Modify the Customers query by adding an index column. Explanation: Index column option is available in query editor to add indexed column starting from 0, 1, or custom number. Which two of the following strategies are recommended when designing the queries to import data from an OLTP-style database into a Power BI Desktop project? A) Normalizing the data model to make it better suited for data analysis and reporting. B) Denormalizing the data model to make it better suited for data analysis and reporting. C) Refactoring the imported tables into a multidimensional cube. D) Refactoring the imported tables into a star schema. - B) Denormalizing the data model to make it better suited for data analysis and reporting. D) Refactoring the imported tables into a star schema. Explanation: Denormalization and star schema is desired to transform the data in the format that is best fit for visualizations. Which of the following statements are true with respect to designing a Power BI Desktop project in DirectQuery mode? A) All queries within the project must be from a single source database. B) No support for parent-child DAX functions. C) You cannot convert column data types when editing a query. D) You cannot add measures to the data model. - B) No support for parent-child functions. Explanation: When in DirectQuery mode, it is not possible