Power BI 面试题与答案
问题 11. Explain the difference between Power BI Report Server and Power BI Service.
Power BI Report Server is an on-premises version of Power BI Service. While Power BI Service is a cloud-based solution, Power BI Report Server allows organizations to host and manage reports on their own servers.
问题 12. How do you handle row-level security in Power BI?
Row-level security in Power BI allows you to restrict data access based on user roles. It is implemented using DAX filters to control which data users can see based on their role assignments.
问题 13. What is the purpose of the 'M' language in Power BI?
The 'M' language is used in Power BI's Power Query Editor for data transformation and manipulation. It is a functional language that helps define the steps to clean and shape data before loading it into the data model.
问题 14. How can you create a calculated table in Power BI?
A calculated table in Power BI is created using DAX expressions. You can define calculations based on existing tables or columns in the data model. The new table is then used in the report.
问题 15. What is the purpose of the Power BI REST API?
The Power BI REST API allows developers to embed Power BI reports and dashboards into custom applications. It provides programmatic access to Power BI artifacts, enabling automation and integration with other services.
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