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Table of contents
1.
Introduction
2.
Beginner Level Power BI Interview Questions 
2.1.
1. What is the full name of Power BI?
2.2.
2. What is Power BI?
2.3.
3. What is a Power BI desktop?
2.4.
4. What are the different types of views available in Power BI?
2.5.
5. Why should we use Power BI?
2.6.
6. How does Power BI work?
2.7.
7. What is row-level security?
2.8.
8. What do you understand about Power BI custom visuals?
2.9.
9. What do you understand by Power Query?
2.10.
10. What is DAX?
2.11.
11. What is self-help BI?
2.12.
12. What are the different data types of DAX?
3.
Intermediate Level Power BI Interview Questions 
3.1.
1. What parts are included in Microsoft's Self-Service Business Intelligence Solutions?
3.2.
2. Differentiate briefly between Power BI Pro and Power BI?
3.3.
3. What is bi-directional cross-filtering?
3.4.
4. Explain the three fundamental concepts of DAX?
3.5.
5.  What is the difference between Distinct() and Values() in DAX?
3.6.
6. What is SSBI?
3.7.
7. What are responsive slicers in Power BI?
3.8.
8. What are the KPIs in Power BI?
3.9.
9. State the advantages of the Direct query method?
3.10.
10. Explain how to use Power BI's responsive slicer.
3.11.
11. What do you mean by M language?
3.12.
12. What are the various connection modes in Power BI?
4.
Advanced Level Power BI Interview Questions 
4.1.
1. What is SSRS? How is it different from Power BI?
4.2.
2. What are the types of visualizations in Power BI?
4.3.
3. Explain paginated reports.
4.4.
4. What is Power BI Designer?
4.5.
5. Explain the transformation in Power Query Editor?
4.6.
6. Is it possible to incorporate geographic data into Power BI Reports? If so, how should you proceed?
4.7.
7. How many active relationships can we have between two tables in the Power Pivot data model?
4.8.
8. Difference Between New Measure and New column?
4.9.
9. Explain the building blocks of Microsoft Power BI.
4.10.
10. List out some drawbacks of using Power BI.
5.
Conclusion
Last Updated: Mar 27, 2024

Power Bi Interview Questions

Author Gunjan Batra
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Introduction

Power BI is an interactive software product for data visualization developed by Microsoft that focuses on Business Intelligence. It is part of the Microsoft Power Platform. Power BI is a collection of software (services), applications, and connectors that work together to transform your data sources into integrated, visually focused, and interactive data. Your data may be an Excel spreadsheet or a cloud-based compiled data collection.

Power Bi Interview Questions

So if you got an interview call for a Power BI role and wanted a quick guide before your interview, you have come to the right place. 

Recommended Topic, Pandas Interview Questions

Beginner Level Power BI Interview Questions 

1. What is the full name of Power BI?

Power BI provides cloud-based BI (business intelligence) services, known as "Power BI Services'', as well as a desktop-based interface called "Power BI Desktop." It provides data repository capabilities, including data editing, data acquisition(discovery), and interactive dashboards.

2. What is Power BI?

Power BI is a cloud-based data-sharing site. Once you have improved reports using Power Query, Power Pivot, and Power View, you can share your information with colleagues. This is where Power BI comes into play. Power BI, technically a part of SharePoint online, allows you to upload Excel workbooks to the cloud and share them with a select group of colleagues. Not only that, but your colleagues can share your reports to use filters and highlight data. Power BI is an easy way to share your analytics and data from Microsoft Clouds.

3. What is a Power BI desktop?

Power BI Desktop is a free desktop application that can be installed on your computer. To access Power BI features, visualize data, or model to create reports, you can download the desktop version of Power BI. With the desktop version, you can extract data from a variety of data sources, modify it, create visuals or reports, and share it using power bi services.

4. What are the different types of views available in Power BI?

Power BI has different types of views, namely:

  • Data Views: Selecting, testing, and viewing data tables in a data set. In contrast, the query editor looks at the data after it is assigned to the model by considering the data.
     
  • Model view: This view shows all the tables and their complex relationships. With this, you can break these complex models into simplified drawings or set the properties at once.
     
  • Report view: It shows tables in an interactive format for easy data analysis. You can create n-number of reports, provide visuals, compile, or use any such function. 

5. Why should we use Power BI?

Power BI provides an easy way for everyone, including non-professionals, to connect, modify, and visualize their raw business data from a variety of sources and make it essential data that makes it easy to make wise business decisions.

6. How does Power BI work?

The main purpose of Power BI is to increase business growth by combining information more efficiently. It brings your company's data forward in a seamless, transparent way. Staff and team members come forward systematically by accessing the same information translated into simplified reports, charts, diagrams, and more. Power BI Works effectively by improving your operational efficiency.

7. What is row-level security?

Row-level security, based on filters, restricts the data that a user may see and access. To set up row-level security, users may define rules and roles in Power BI Desktop and upload them to Power BI Service.

8. What do you understand about Power BI custom visuals?

At PowerBI, you can create your visuals from the custom visual library. A development project should be created and test the visibility of the PowerBI service. When visualization is customized, it is tested and checked before posting. After testing, visualization is saved in .pbiviz file format before sharing. But you need to be a PowerBI Pro user to customize it.

9. What do you understand by Power Query?

Power Query is a business intelligence tool designed for Excel by Microsoft. Power Query lets you import data from a variety of data sources and will enable you to clean, modify and resize your data according to needs. Power Query lets you write your query once and use it by simple refresh.

10. What is DAX?

DAX stands for Data Analysis Expressions. A set of functions, operators, and constants is used in formulas to calculate and recover values. In other words, it helps you create new information from the data you already have.

11. What is self-help BI?

SSBI is an acronym for Self-Service Business Intelligence and is a breakthrough in business intelligence. SSBI has empowered many business professionals with no technical or coding background to use Power BI and generate reports and draw predictions successfully. Even non-technical users can create these dashboards to help their businesses make informed decisions. 

12. What are the different data types of DAX?

The types of Dax data are:- 

1) Numeric

2) Boolean

3) DateTime 

4) String and 

5) Decimal

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Intermediate Level Power BI Interview Questions 

1. What parts are included in Microsoft's Self-Service Business Intelligence Solutions?

Microsoft Self-Service BI is divided into two parts:

  • Excel BI Toolkit: This allows users to build interactive reports by importing data from various sources and modelling data as needed.
     
  • Power BI: It is an online service that allows users to share interactive reports and queries developed using the Excel BI Toolkit.

2. Differentiate briefly between Power BI Pro and Power BI?

Power BI provides a variety of capabilities to assist you in getting started in an entirely new manner of looking for data. On the other hand, Power BI Pro has capabilities like data scheduling, live data sources, storage capacity, comprehensive interactivity, and much more.

3. What is bi-directional cross-filtering?

Bidirectional cross-filtering allows data modellers to choose how their Power BI Desktop filters flow for data by leveraging table connections. The filter context is sent to a second related table on the other side of any given table relationship. This approach assists data modellers in resolving the many-to-many issue without the need for complex DAX calculations. To summarise, bidirectional cross-filtering makes data modellers' jobs simpler.

4. Explain the three fundamental concepts of DAX?

Below are the fundamental concepts of Power BI:

  • Syntax: This is how the formula is written—the pieces that make it up. Functions such as SUM are included in the Syntax (used when you want to add figures). If the Syntax is incorrect, you will receive an error notice.
     
  • Functions: These formulae, like Excel functions, employ specific values (also known as arguments) in a precise sequence to execute a computation. Date/time, time intelligence, information, logical, mathematical, statistical, text, parent/child, and other functions are available.
     
  • Context: There are two kinds of context: row and filter contexts. When a formula contains a function that applies filters to identify a single row in a table, row context comes into play. The filter context is used when one or more filters are used in a calculation to determine a result or value.

5.  What is the difference between Distinct() and Values() in DAX?

We use the Distinct() and Values() methods to return the values to a worksheet column or cell. The distinction is that the Values() method returns both blank values and unique values, but the Distinct() function only returns unique values.

6. What is SSBI?

SSBI is an abbreviation for Self-Service Business Intelligence. It is also known as data analytics access because it enables business users to partition, clean, and evaluate data. SSBI has made it simple for end-users to access their data and generate various graphics to gain valuable business insights. Anyone with a rudimentary understanding of data may create reports to create intuitive and shared dashboards.

7. What are responsive slicers in Power BI?

A developer may scale a responsive slicer to various widths and shapes on a Power BI final report page, and the data gathered in the container will be reorganised to find a match. When a visual report grows too tiny to be effective, a symbol representing the visual replaces it, freeing up space on the report page.

8. What are the KPIs in Power BI?

KPIs are Key Success Indicators that measure the performance of a company in certain areas by analyzing quantifiable objectives and values. A KPI has a base value or measure compared to goal values. It contains a performance comparison with the aim. With their graphical portrayal, KPIs can assist you in evaluating analysis performance. As a result, KPIs will reveal whether or not your objectives have been fulfilled.

9. State the advantages of the Direct query method?

Answer 15) The following are the benefits of using the Direct inquiry method:

  • The Direct Query Method allows users to create large data sets of data visualizations. However, the Power BI desktop-only enables data visualizations on smaller sets.
     
  • The direct query technique has no dataset limit, and the 1GB dataset restriction does not apply to this approach.

10. Explain how to use Power BI's responsive slicer.

The developer can resize and shape the responsive slicer on the Power BI final report page. The data collected in the container will be reorganized to achieve the same result (find the match). The graphical icon replaces the visual report when it becomes too small to be used, saving space on the report page.

11. What do you mean by M language?

M is a case-sensitive functional programming language that is utilised in Power queries. It is simple to use and similar to other programming languages.

12. What are the various connection modes in Power BI?

The three modes of connection are: 

  • Import mode is the default mode in PowerBI because it is commonly used and provides rapid performance. It can aggregate data from several sources, and then save and fully load imported data on a disc while updating or querying.
     
  • Direct Query mode: This is another method of importing data by querying an existing data source. We utilise DirectQuery to prevent updating the data if the data volume is too large, as it may take longer.
     
  • Composite Mode: Import and Direct Query modalities are combined in Composite Mode. This option works with tables that DirectQuery doesn't. It combines the best features of the previous two modes.

Advanced Level Power BI Interview Questions 

1. What is SSRS? How is it different from Power BI?

SQL Service Reporting Service stands for SQL Service Reporting Service. It's a reporting platform that runs on a server. Microsoft's SQL Server suite includes SSRS. In many aspects, it is similar to Power BI, although it is a more traditional tool. SSRS is primarily used for enterprise data visualization and report generation, viewing, and sharing. It contains an integrated set of processing components and a programming interface. SSRS includes less graphical, drag-and-drop options and more programming-based tools for report creation. As a result, users must exert more significant manual effort. 

The following are some critical distinctions between Power BI and SSRS:

  • SSRS requires a SQL Server licence, but Power BI is free. However, Power BI Report Server requires purchasing a Power BI Premium subscription.
     
  • SSRS is server-based, whereas Power BI is cloud-based.
     
  • SSRS is traditional and programming-based, whereas Power BI is more current and graphical. To prepare reports and do analyses with SSRS, manual effort and time are required.
     
  • In Power BI, we may use data from the cloud. We can only use on-premise data using SSRS.
     
  • Cortana has been integrated into Power BI, enabling AI-based natural language and Q&A about your data and reports. This feature is not available in SSRS.
     
  • In SSRS, you must purchase a license, define requirements and scope, customize your software, deploy, develop reports in a coding interface, schedule data refreshes, etc.
     
  • Power BI has a graphical interface with the drag-and-drop capability to create reports. You can work with unstructured data, use modern rendering, publish, integrate and collaborate easily across platforms.

2. What are the types of visualizations in Power BI?

A graphical depiction of data is called visualisation. Reports and dashboards can be created using visualisations. Bar charts, Column charts, Line charts, Area charts, Stacked area charts, Ribbon charts, Waterfall charts, Scatter charts, Pie charts, Donut charts, Treemap charts, Maps, Funnel charts, Gauge charts, Cards, KPI, Slicer, Table, Matrix, R script visual, Python visual, and others are examples of visualisations available in Power BI.

3. Explain paginated reports.

A paginated report is a document-style report structured from page to page. Paginated reports are saved as paged documents, which can be expanded vertically and horizontally to access all information. These reports have a fixed layout and are pixel-perfect. When printing a report from a PDF or Word file, they may be the best option. The.RDL extension is used for paginated files.

4. What is Power BI Designer?

Power BI Designer is a standalone Power BI companion application. Power Query, Power Pivot, and Power View combine into one application. Power BI Designer is a tool for working with data and creating Power BI reports and other features. The Power BI Designer can be downloaded from the Power BI website. Reports developed in Power BI Designer can later be published to the Power BI Service. 

5. Explain the transformation in Power Query Editor?

The Power Query Editor allows us to import data from various sources and change it in a variety of ways to meet our needs. 

The following are some common data transformation practices in Power Query Editor:

  • Change the column data types.
     
  • Columns are renamed.
     
  • Change the settings.
     
  • Correct any inaccuracies in the Any Column group.
     
  • In Structured Column groups, working with nested data.
     
  • Add custom columns, conditional columns, measurements, and other features.
     
  • Run R Script tool in Power BI Query Editor, run R Queries directly.

6. Is it possible to incorporate geographic data into Power BI Reports? If so, how should you proceed?

Yes, there are various ways to map geographic data into Power BI reports. Bing Maps is integrated with Power BI, and by default, it offers the coordinates of locations on the map. This is known as geocoding because it eliminates the need for users to enter longitude and latitude data manually. In Power BI, you can utilize map charts and filled map charts to use geographic data in reports and dashboards.

7. How many active relationships can we have between two tables in the Power Pivot data model?

In a Power Pivot data model, we can have several relationships between tables. However, in the data model between two tables, there can only be one active relationship at a time. The other relationships stay inactive while one of the many relationships is active. Active relationships are depicted by a continuous line in the Power Pivot data model, while dotted lines indicate inactive relationships.

8. Difference Between New Measure and New column?

A new column is a region in Power Bi where physical data is saved when logic is applied, whereas a measure is where computations based on dimensions are conducted on the fly. In contrast to Column, Action will not retain any physical data.

9. Explain the building blocks of Microsoft Power BI.

Power BI's key building blocks are as follows:

  • Visualizations: The practice of creating charts and graphs to illustrate insights from corporate data is known as visualization.
     
  • Datasets: A dataset is a collection of data used to produce a display, such as a sales column. A dataset may be aggregated and filtered from several sources using built-in data plugins.
     
  • Reports: The report stage is the last. A collection of visualizations on one or more pages may be found here. A final report, for example, may include charts and maps.
     
  • Dashboards: A Power BI dashboard enables you to share a single visualization with colleagues and clients for them to see your final dashboard.
     
  • Tiles: A tile is a standalone visualization on your final dashboard or one of your final report's charts.

10. List out some drawbacks of using Power BI.

The following are some of the limitations of Power BI:

  • Power BI does not accept files bigger than 1 GB in size and does not blend imported and real-time data.
     
  • Few data sources provide real-time access to Power BI reports and dashboards.
     
  • It only shows dashboards and reports to people who use the same email address.
     
  • Dashboard does not take or pass parameters for users, accounts, or others.

Conclusion

For freshers with little experience, the article discussed frequently asked Snowflake interview questions. The questions listed above are some of the most common Snowflake interview questions, and knowing how to answer them will help you ace your job interviews with ease.

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