10+ MSBI and Power BI Developer Interview Questions and Answers

I am an experienced MSBI and Power BI Developer with expertise in SQL joins and data handling.

• I have worked on various projects involving data analysis, visualization, and reporting using MSBI and Power BI tools.

• I am proficient in different types of SQL joins such as inner join, outer join, left join, and right join.

• I am looking to make a transition to a new role that challenges me and allows me to grow professionally.

• I handle data by first understanding the requirements and ...read more

Transformations in Power Query include filtering, sorting, grouping, pivoting, unpivoting, merging, appending, and more.

• Filtering data based on specific criteria

• Sorting data in ascending or descending order

• Grouping data to perform aggregate functions

• Pivoting data to change the layout of the table

• Unpivoting data to normalize the table structure

• Merging data from multiple sources

• Appending data from multiple tables or queries

SUM is an aggregation function in DAX that adds up all the values in a column, while SUMX is an iterator function that performs a calculation for each row in a table.

• SUM is used to calculate the total of a column, while SUMX is used to iterate over a table and perform calculations row by row.

• SUM ignores any filters applied to the column, while SUMX considers the current row context.

• SUMX is commonly used with iterators like FILTER or RELATED to perform more complex calculation...read more

Power BI Desktop is a desktop application for creating reports and Power BI Service is a cloud-based platform for sharing and collaborating on reports.

• Power BI Desktop is used for creating reports and visualizations on a local machine.

• Power BI Service is used for sharing, collaborating, and viewing reports online.

• Power BI Desktop does not require an internet connection to work.

• Power BI Service allows for real-time data refresh and sharing of reports with others.

• Power BI Deskt...read more

RLS can be applied to reports by defining role-based security rules in Power BI Desktop or Power BI Service.

• Define roles in Power BI Desktop or Power BI Service

• Assign users to roles

• Create role-based security rules to restrict data access based on user roles

DAX (Data Analysis Expressions) is a formula language used in Power BI and Excel Power Pivot for data analysis and calculations.

• DAX is similar to Excel formulas but designed for more complex calculations and data analysis.

• DAX expressions can be used to create calculated columns, measures, and calculated tables in Power BI.

• DAX functions include aggregation functions like SUM, AVERAGE, and COUNT, as well as time intelligence functions like SAMEPERIODLASTYEAR.

• DAX expressions can...read more

Power Query is a data connection technology that enables you to discover, connect, combine, and refine data across a wide variety of sources.

• Power Query is a tool in Microsoft Excel and Power BI used for data transformation and manipulation.

• It allows users to import data from various sources, clean and transform the data, and load it into the desired destination.

• Power Query uses a graphical user interface to simplify the process of data preparation.

• It supports a wide range of...read more

A getaway is a place where one can escape from everyday life and relax or have fun.

• A getaway can be a vacation to a different city or country

• It can also be a weekend retreat to a cabin in the mountains

• Getaways are often used to de-stress and recharge

• Some popular getaway destinations include beach resorts, spa retreats, and national parks

Power BI is a business analytics tool by Microsoft that provides interactive visualizations and business intelligence capabilities.

• Business analytics tool by Microsoft

• Provides interactive visualizations

• Offers business intelligence capabilities

A table is a two-dimensional representation of data, while a matrix is a multi-dimensional representation of data.

• Tables have rows and columns, while matrices can have multiple dimensions.

• Tables are typically used for simple data structures, while matrices are used for more complex data analysis.

• In Power BI, tables are used for displaying data in a tabular format, while matrices are used for creating pivot tables and cross-tab reports.

SQL indexing is a technique to improve query performance by creating indexes on columns in database tables.

• Indexes are created using CREATE INDEX statement in SQL.

• Indexes can be clustered or non-clustered.

• Clustered indexes physically reorganize the table to match the index order.

• Non-clustered indexes store a separate copy of the indexed columns.

• Indexes should be created on columns frequently used in WHERE, JOIN, and ORDER BY clauses.

• Indexes can be unique or non-unique.