Power BI 面试题与答案
问题 1. What is Power BI?
Power BI is a business analytics service by Microsoft that provides interactive visualizations and business intelligence capabilities with an interface simple enough for end users to create their own reports and dashboards.
问题 2. Explain the difference between Power BI Desktop and Power BI Service.
Power BI Desktop is a standalone application for creating Power BI reports, while Power BI Service is a cloud-based service for publishing, sharing, and collaborating on Power BI reports and dashboards.
问题 3. What is a data model in Power BI?
A data model in Power BI is a collection of data tables, relationships, and calculations that are used to create meaningful visualizations and insights.
问题 4. How do you create calculated columns in Power BI?
Calculated columns in Power BI are created using Data Analysis Expressions (DAX) in Power BI Desktop. You can use DAX functions to define calculations based on existing columns in your data model.
问题 5. Explain the purpose of Power Query in Power BI.
Power Query is used for data transformation and shaping in Power BI. It allows you to connect to various data sources, clean and transform the data, and then load it into the Power BI data model.
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