Power Bi Interview Questions For Freshers
Essential Power BI Interview Questions for Freshers
Power Bi Interview Questions For Freshers
In a Power BI interview for freshers, candidates can expect questions related to their understanding of data visualization techniques, knowledge of Power BI tools and features, ability to create reports and dashboards, familiarity with data modeling concepts, and problem-solving skills. Employers may also ask about candidates' experience with data cleaning and transformation, data connections, DAX functions, and Power BI best practices. It is important for freshers to showcase their eagerness to learn, passion for data analytics, and adaptability to new technologies during the interview process.
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1 - What is Power BI?
Power BI is a business intelligence tool developed by Microsoft to help users visualize and analyze data from various sources. It allows users to create interactive reports and dashboards to gain insights into their data in a visually appealing manner.
2) What are the different components of Power BI?
Power BI consists of three main components: Power BI Desktop, Power BI Service, and Power BI Mobile. Power BI Desktop is used to create reports and dashboards, Power BI Service allows for sharing and collaboration, and Power BI Mobile enables users to access and interact with reports on their mobile devices.
3) How can you import data into Power BI?
Data can be imported into Power BI from various sources such as Excel files, databases, SharePoint lists, online services like Salesforce, and more. Users can connect to these sources within Power BI Desktop and import the required data to start building their reports.
4) What is DAX in Power BI?
DAX (Data Analysis Expressions) is a formula language used in Power BI to create custom calculations and expressions based on data in the model. DAX functions allow users to perform tasks such as filtering, sorting, and aggregating data to derive meaningful insights.
5) How can you share reports in Power BI?
Reports and dashboards created in Power BI can be shared with others using Power BI Service. Users can publish their reports to the Power BI Service, where they can control access permissions and share the reports with specific individuals or groups within their organization.
6) What is a Power BI gateway?
A Power BI gateway is a tool that allows Power BI to connect to on premises data sources securely. It acts as a bridge between the cloud based Power BI Service and on premises data sources, enabling data refresh and scheduling capabilities for reports connected to those sources.
7) How can you schedule data refresh in Power BI?
Data refresh in Power BI can be scheduled using the Power BI Service. Users can set up a refresh schedule for their datasets to ensure that the data in their reports is up to date. The scheduling options allow for daily, weekly, or custom refresh frequencies based on the user's requirements.
8) What is the difference between calculated columns and measures in Power BI?
Calculated columns are static values calculated row by row, whereas measures are dynamic calculations based on aggregations or calculations over a set of data. Calculated columns are stored in the data model, while measures are calculated on the fly based on user interactions with the report.
9) How can you create relationships between tables in Power BI?
Relationships between tables in Power BI can be created by defining key columns that establish a connection between the tables. By creating these relationships, users can combine data from multiple tables in their reports and perform cross table analyses to derive insights from the data.
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