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Power BI Interview Questions

February 5, 2024

Embark on your Power BI journey with a curated set of interview questions and answers, catering to all levels— freshers, intermediate, and experienced candidates. Elevate your skills with the finest Power BI course at Aimore Technologies, the premier software training institute in Chennai.

Beginners
Intermediate
Experienced
1. What is your characterization of Power BI as a proficient solution?
Power BI is recognized as a highly proficient business intelligence solution that enables users to visualise and analyse data for better decision-making. It offers a user-friendly interface, robust analytics capabilities, and seamless integration with various data sources.
2. Enumerate the principal elements comprising Power BI.
The principal elements of Power BI include Power BI Desktop for report creation, Power BI Service for cloud-based collaboration, and Power BI Mobile for on-the-go access. Additionally, there's Power Query for data transformation, Power Pivot for data modelling, and Power View for interactive reporting.
3. What are the various refresh options available?

Power BI provides different refresh options, such as Scheduled Refresh, which automatically updates data at specified intervals, and On-Demand Refresh, allowing users to manually trigger data refresh. There's also the option for Refresh Now, which updates the data immediately.

4. What are the different connectivity modes in Power BI?

Power BI supports various connectivity modes, including Import mode where data is loaded into Power BI, DirectQuery mode allowing live connections to data sources, and Live Connection mode for connecting to datasets stored in the Power BI service.

5. What is a Power BI desktop?

Power BI Desktop is a free application that serves as the authoring tool for creating Power BI reports and dashboards. It allows users to connect to different data sources, transform and model data, and design visually appealing reports before publishing them to the Power BI Service.

6. Where is the data stored in Power BI?

In Power BI, data can be stored in the Power BI Service, a cloud-based platform provided by Microsoft. Users can upload and refresh datasets in the Power BI Service, making the data accessible to other users within the organisation.

7. What are the available views?

Power BI offers different views, including a Reading view for consuming reports, an Editing view for modifying reports in Power BI Desktop, and a dashboard view for organising and interacting with multiple reports and visualisations in a consolidated manner.

8. What are the available formats?

Power BI supports various formats for importing and exporting data, including Excel workbooks, CSV files, SQL Server databases, and cloud-based sources like Azure SQL Database and SharePoint Online.

9. Power BI can connect to which data sources?

Power BI can connect to a wide range of data sources, including Excel workbooks, SQL Server databases, Azure services, SharePoint lists, online services like Google Analytics, and many other data repositories, ensuring flexibility and versatility in data integration.

1. What is a dashboard?
A dashboard is a visual display of data that provides a consolidated and interactive view of key performance indicators (KPIs), metrics, and other relevant information. Dashboards are designed to facilitate data analysis and decision-making by presenting data in a comprehensible and visually appealing manner.
2. What are the building blocks of Power BI?

The building blocks of Power BI include:

  • Power Query: Used for data transformation and cleaning.
  • Power Pivot: Enables data modelling and creating relationships between data tables.
  • Power View: enables interactive exploration and visualisation of data.
  • Power Map: Allows for the creation of 3D geographical visualisations.
  • Power Q&A: Enables natural language querying of data.
  • Power BI Desktop: The authoring tool for creating Power BI reports and dashboards.
  • Power BI Service: The cloud-based platform for publishing, sharing, and collaborating on Power BI content.
3. What are content packs in Power BI?
Content packs in Power BI are pre-built collections of dashboards, reports, and datasets that are designed to address specific business needs. These packs can be created and shared by organisations or individuals, making it easier for users to access and utilise standardised sets of data and visualisations.
4. What are the various Power BI versions?

Power BI comes in three main versions:

  • Power BI Desktop: The free authoring tool for creating reports and dashboards.
  • Power BI Pro: A subscription-based service that allows sharing and collaboration on reports.
  • Power BI Premium: A more advanced subscription that provides dedicated cloud resources, better performance, and additional features.
5. What is DAX?
DAX, or Data Analysis Expressions, is a formula language used in Power BI, Excel, and other Microsoft tools. It is designed for creating custom calculations and aggregations in data models, allowing users to define new information based on the existing data.
6. What are the significance and advantages of employing the DAX function?

DAX functions in Power BI are significant for:

  • Custom Calculations: Users can create tailored calculations to meet specific analytical requirements.
  • Aggregations: DAX allows for the creation of complex aggregations and summaries of data.
  • Data Modeling: It plays a crucial role in defining relationships and hierarchies in data models.
7. What is Power Pivot?
Power Pivot is an Excel add-in and a component of Power BI that enables users to import, model, and analyse large volumes of data. It supports the creation of relationships between tables and the construction of data models for advanced analytics.
8. What is a Power Query?
Power Query is a data connectivity and preparation tool in Power BI that facilitates the process of importing, transforming, and cleaning data from various sources. It helps users shape the data into a suitable format for analysis.
9. Difference between Power BI and Tableau?
Power BI and Tableau are both powerful business intelligence tools, but they differ in terms of user interface, pricing, and integration. Power BI is more tightly integrated with Microsoft products, while Tableau provides a more intuitive drag-and-drop interface for data visualisation.
10. What is GetData in Power BI?
GetData is a feature in Power BI that allows users to connect to various data sources, import data, and create data models for analysis and visualisation. It is a crucial step in the data preparation process within Power BI.
11. What are filters in Power BI?
Filters in Power BI are used to restrict the data displayed in visuals, reports, or dashboards based on specific criteria. They can be applied to individual visuals or at the report level, helping users focus on relevant information and analyse data from different perspectives.
1. What are the types of visualisations in Power BI?
Power BI offers a variety of visualisations, including basic charts (e.g., bar charts, line charts, pie charts), maps, tables, matrices, cards, gauges, and more. Users can also access custom visualisations created by the community.
2. How can we define Power BI services?

Power BI services refer to the cloud-based platform provided by Microsoft for sharing, collaborating, and distributing Power BI reports and dashboards. It enables users to publish and access reports online, schedule data refreshes, and interact with dashboards.

3. What is the comprehensive working system of Power BI?

Power BI operates by connecting to various data sources, transforming and modelling the data using Power Query and Power Pivot, creating visualisations in Power BI Desktop, and then sharing and collaborating on the reports and dashboards through Power BI services.

4. What are custom visuals in Power BI?

Custom visuals in Power BI are user-developed or community-contributed visualisations that extend the capabilities of standard visualisations. These can be imported and used in Power BI reports to provide unique and specialised ways to present data.

5. What are the various types of users who can use Power BI?

Power BI caters to a diverse user base, including business analysts, data scientists, executives, IT professionals, and developers. Each category of users may have different roles, responsibilities, and levels of expertise in creating, analysing, or managing Power BI reports and dashboards.

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