Senior Power BI Developer Interview Questions and Answers

The question involves finding the output of a table, ways to find max and second max in SQL, row level security on column, and index in details.

• To find the output of the table, you need to analyze the pattern of the data and count the occurrences of each value for each letter.

• To find the max and second max in SQL, you can use the MAX() function with ORDER BY and LIMIT clauses, or use a subquery to find the second highest value.

• Row level security on a column can be implemented...read more

Data governance in Power BI involves establishing policies, processes, and controls to ensure data quality, security, and compliance.

• Establish data quality standards and guidelines for data sources

• Implement role-based access control to restrict access to sensitive data

• Monitor data usage and track changes to ensure compliance with regulations

• Create data lineage documentation to track the flow of data from source to report

Data modeling involves structuring and organizing data to make it easier to analyze and visualize in Power BI.

• Identify the key business questions and goals to determine what data needs to be collected and analyzed.

• Normalize data to reduce redundancy and improve data integrity.

• Create relationships between different data tables to enable accurate analysis and visualization.

• Use data modeling techniques such as star schema or snowflake schema to optimize performance.

• Utilize DAX c...read more

Direct query connects to data source in real-time, while import loads data into Power BI for faster analysis.

• Direct query retrieves data from source on-demand, ensuring real-time data accuracy.

• Import loads data into Power BI for faster analysis, but may not reflect real-time changes.

• Direct query is suitable for large datasets that require up-to-date information.

• Import is ideal for smaller datasets or when real-time data is not necessary.