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Description : Here are 20 commonly asked Power BI interview questions along with their answers:

Tags : magnitia | Power BI

Published on : Jul 25, 2023
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Top 20 Power BI Interview Questions and Answers in 2023 Presentation Transcript

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www.magnitia.com |+91 6309 16 16 16 |+91 6309 17 17 17 | info@magnitia.com Top 20 Power BI Interview Questions and Answers in 2023

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www.magnitia.com |+91 6309 16 16 16 |+91 6309 17 17 17 | info@magnitia.com Here are 20 commonly asked Power BI interview questions along with their answers: What is Power BI? Power BI is a business analytics tool developed by Microsoft. It allows users to visualize and analyze data from various sources, create interactive reports, and share insights across an organization. What are the different components of Power BI? Power BI consists of three main components: Power BI Desktop (for creating reports and visualizations), Power BI Service (for publishing and sharing reports online), and Power BI Mobile (for accessing reports on mobile devices). What is the difference between Power BI Desktop and Power BI Service? Power BI Desktop is a Windows application used for creating and designing reports, while Power BI Service is a cloud-based platform where reports can be published, shared, and accessed online.

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www.magnitia.com |+91 6309 16 16 16 |+91 6309 17 17 17 | info@magnitia.com How can you import data into Power BI? Data can be imported into Power BI from various sources such as Excel, SQL databases, SharePoint, Azure, and many others. Power BI provides built-in connectors and supports direct query, import, and live connection options. What is a data model in Power BI? A data model in Power BI is a collection of tables, relationships, and calculations that define how data is organized and related to each other. It forms the foundation for creating reports and visualizations. What are the different types of reports you can create in Power BI? Power BI supports various types of reports, including interactive reports, paginated reports, and analytical reports. Interactive reports allow users to explore data, while paginated reports are designed for printing or generating PDFs. How can you create relationships between tables in Power BI? Relationships between tables can be established in Power BI by connecting related fields (columns) using the “Manage Relationships” option. Power BI automatically detects and suggests relationships based on field names.

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www.magnitia.com |+91 6309 16 16 16 |+91 6309 17 17 17 | info@magnitia.com What is DAX in Power BI? DAX (Data Analysis Expressions) is a formula language used in Power BI to create custom calculations, measures, and queries. It is similar to Excel formulas but with more advanced functions and capabilities. What is a measure in Power BI? A measure in Power BI is a calculation performed on the data to derive meaningful insights. Measures are created using DAX expressions and can be used in visualizations and reports. What is a calculated column in Power BI? A calculated column is a column in a table that is created by defining a DAX formula. The formula is evaluated for each row, and the result is stored as a new column in the table. Calculated columns are useful for data transformations and calculations. How can you share reports in Power BI? Reports can be shared in Power BI by publishing them to the Power BI Service. Once published, reports can be accessed by authorized users, who can view, interact with, and share the reports with others.

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www.magnitia.com |+91 6309 16 16 16 |+91 6309 17 17 17 | info@magnitia.com How can you schedule data refresh in Power BI? Data can be refreshed automatically in Power BI by setting up a data refresh schedule. This can be done in the Power BI Service, where you can specify the data sources, refresh frequency, and credentials for refreshing the data. What is Power Query in Power BI? Power Query is a data transformation and shaping tool in Power BI that allows you to connect to various data sources, apply transformations, and load the data into the data model. It provides a user-friendly interface for data preparation. How can you create calculated tables in Power BI? Calculated tables can be created in Power BI using DAX expressions. You can define a DAX formula that generates a new table based on existing tables or calculations. Calculated tables are useful for creating summary tables or derived data. What is the difference between a slicer and a filter in Power BI? A slicer is a visual element in Power BI that allows users to filter data interactively, while a filter is a feature that can be applied to visuals or the entire report to restrict the data displayed based on specific criteria..

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www.magnitia.com |+91 6309 16 16 16 |+91 6309 17 17 17 | info@magnitia.com What is self-service BI, anyway? Self-service BI refers to the ability of business users to independently analyze and explore data without relying on IT or data experts. It empowers users to create their own reports, visualizations, and insights using user-friendly tools like Power BI. What is DAX? DAX (Data Analysis Expressions) is a formula language used in Power BI to perform calculations, create custom measures, and define advanced data manipulations. It enables users to derive insights and perform complex calculations on their data models. What is DAX? DAX (Data Analysis Expressions) is a formula language used in Power BI to perform calculations, create custom measures, and define advanced data manipulations. It enables users to derive insights and perform complex calculations on their data models.

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www.magnitia.com |+91 6309 16 16 16 |+91 6309 17 17 17 | info@magnitia.com What are Filters in Power BI? Filters in Power BI are used to restrict the data displayed in visualizations, reports, or dashboards based on specific criteria. They allow users to focus on specific subsets of data by selecting values or ranges for specific fields, thereby refining the analysis and providing more targeted insights. What are Custom Visuals in Power BI? Custom visuals in Power BI are user-created visualizations that extend the built-in set of visual options. They can be downloaded and imported into Power BI to provide unique and specialized visual representations, allowing users to enhance their reports with custom charts, maps, and other visual elements.

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