Power Bi Interview Questions for Freshers & Answers (2025)

Power BI is a business analytics tool developed by Microsoft that enables users to visualize and share insights from data.

The main components of Power Bi are -

• Power BI Desktop,
• Power BI Service,
• Power BI Mobile

Power BI Desktop is a Windows application used to create reports and visualizations, while Power BI Service is a cloud-based platform to publish, share, and collaborate on these reports.

Data can be imported from various sources such as Excel, SQL databases, SharePoint, web services, and more.

DAX stands for Data Analysis Expressions. This is a formula language used in Power BI to create custom calculations and aggregations of data.

Relationships define how tables in the data model are connected to each other, enabling the creation of meaningful reports and visualizations.

Power Query is used for data transformation and shaping before loading it into the data model. It allows cleaning, merging, and structuring data from various sources.

Drag and drop fields onto the canvas in Power BI Desktop and choose the appropriate visualization type.

A measure is a DAX formula used to perform calculations on data, usually for summarizing or aggregating values.

In Power BI Desktop, you can create a calculated column by using DAX expressions in the "Modeling" tab.

DirectQuery allows Power BI reports to query data directly from a database, without loading it into the data model.

Power BI reports can be shared through the Power BI Service, embedded in websites or applications, or exported as PDFs.

Discuss the strengths and weaknesses of Power BI in comparison to these tools.

Techniques include data model optimization, using summarized tables, managing relationships, and writing efficient DAX calculations.

Row-level security restricts data access based on user roles, ensuring that different users see only the data they are authorized to see.

The Power BI Gateway is used to connect on-premises data sources to the Power BI Service for refreshing data.

The Common Data Model is a standardized, extensible data schema used to enable interoperability between various applications, including Power BI.

Power BI Report Server allows you to host and manage Power BI reports on your own server, while Power BI Service is a cloud-based platform provided by Microsoft.

A slicer is a visual filter that allows users to interactively filter data within a report.

Drill-through allows users to navigate from one report page to another, focusing on specific details of a data point.

Power BI templates are pre-built reports that can be reused to create consistent visualizations across different reports.

Power BI Service allows you to schedule data refreshes from various data sources to ensure your reports stay up to date.

The Power Query Editor is used for data transformation, cleaning, and shaping before loading data into the data model.

The Power BI Publisher for Excel is an add-in that allows users to pin Excel ranges, tables, charts, or PivotTables to Power BI dashboards.

A KPI is a visual element used to display the performance of a specific metric against a target value.