IBM Power BI interview questions for Data Analysts
- How can you create and configure a data gateway in Power BI?
Create and configure a data gateway by downloading and installing the Power BI Gateway, registering with a recovery key, configuring data sources and authentication, and setting up gateway clusters for high availability.
- Explain the process of creating a dynamic tooltip in Power BI.
Create a dynamic tooltip by using the “Tooltip” property in the Visualizations pane, adding measures or fields to display, using DAX formulas for dynamic content, and configuring formatting and layout.
- How does Power BI handle real-time data streaming, and what are its use cases?
Power BI handles real-time data streaming through Azure Stream Analytics, PubNub, or other services. Use cases include monitoring sensor data, tracking website analytics, or visualizing financial transactions.
- What are the different types of data relationships in Power BI?
The different types of data relationships in Power BI are:
- One-to-one (1:1)
- One-to-many (1:N)
- Many-to-one (N:1)
- Many-to-many (N:N)
- Describe the purpose and usage of Power BI Premium.
Power BI Premium is a capacity-based licensing model for large-scale deployments, offering dedicated resources, enhanced performance, and advanced features for large datasets, big data analytics, and enterprise-wide reporting.
- How do you create a sunburst chart in Power BI?
Create a sunburst chart by using the “Sunburst” custom visual, adding a hierarchy of categories, configuring size, color, and layout settings, and using DAX measures to calculate values.
- What are the differences between a line chart and an area chart in Power BI?
Line charts show trends over time or categories, while area charts display cumulative totals or volumes. Line charts use markers, while area charts use filled regions.
- Explain the concept of Data Analysis Expressions (DAX) in Power BI.
DAX is a formula language for Power BI calculations, used for measures, calculated columns, and data validation, supporting functions, operators, and variables.
- What is the significance of the “Drillthrough” feature in Power BI?
The “Drillthrough” feature allows users to drill into detailed data from a summary visual, enabling exploration of underlying data, and supports up to 10 fields for drillthrough details.
