Power BI Interview Questions and Answer
1. What are the significant differences between visual filters, page-level filters, and Power BI reports?
Visual level filters are used to filter data within a single visualization. Page-level filters work across the entire page in the report, and different pages can have additional filters.
Report-level filters filter all visualizations and pages in the report.
List the most common data sharing techniques.
2. How is Schedule Refresh designed?
Users can set automatic data refresh based on daily or weekly requests. Users can only schedule one daily update unless they have Power BI Pro. The Schedule Refresh section uses drop-down menu options to select the frequency, time zone, and time of day.
Power Map can display geographic visualizations. That’s why location data is neededfor example, city, state, country, or latitude and longitude.
4. Which in-memory analysis engine does Power Pivot use?
Power Pivot uses the xVelocity module. Velocity can process vast amounts of data and store data in columnar databases. When using in-memory analysis, all data is loaded into RAM, which increases processing speed.
List the essential components of SSAS
Below are some of the core components of SSAS:
It describes data drilling in SSAS as exploring data details with several granularity levels.
Slicer.
The process of data partitioning in SSAS is the process of storing data into rows and columns.
Pivot tables
Pivot tables help switch between different categories of data stored between rows and columns.
5. What are the three basic concepts of the DAX language?
Syntax: This is how a formula is written – the elements that make it up. The syntax includes functions like SUM (used when you want to add numbers). An error message is shown if the syntax is incorrect.
Functions: These formulas use specific values ??(also known as arguments) within a particular order to perform a calculation, similar to processes in Excel. The feature categories are Date/Time, Time Intelligence, Informational, Logical, Mathematical, Statistical, Textual, Parent/Child, and more.
Context: There are two types of context: row and filter.
6. Name the different Power BI formats.
Power BI is mainly available in three formats, as listed.
-
Power BI Desktop: Open-Source version for Desktop users
-
Power BI Services: For online services
-
Power BI mobile app: Compatible with mobile devices
7. What are the different phases of how Power BI works?
As explained below, there are three distinct phases of working on Power BI.
-
Data integration
-
Data processing
-
Presentation of data
Data integration
The first step in any business intelligence is establishing a successful connection to a data source and integrating it to pull out data for processing.
Data processing
The Second step in business intelligence is data processing. Raw data usually also contains unexpected erroneous data, or several data cells may be empty. The BI tool must interpret missing values ??and inaccurate data for processing in the data processing phase.
Presentation of data
The last stage of business intelligence is analyzing data obtained from the source and presenting findings using visually attractive graphs and interactive panels.
8. Which professionals use Power BI the most?
Both Beginners and experts prefer Power BI in business intelligence. Power BI is primarily used by the following professionals.
-
Business analysts
-
Business owners
-
Business developers
Business analysts
A business analyst analyzes business data and presents the findings using visually appealing charts and dashboards.
Business owners
To view statistics and understand predictions to make business decisions, business owners, decision-makers, or organizations use Power BI.
Business developers
Business Developers are just software developers who are hired for business purposes to develop custom applications and dashboards to help smooth business processes.
9. What is an advanced editor?
The advanced editor is used to view Power BI’s queries on data sources importing data. The question is rendered in M-code. Users who want to view the query code select “Edit Queries” on the Home tab and click “Advanced Editor” to work on the query. Any changes are saved to Applied Steps in Query Settings.
10. What gateways does Power BI have, and why should you use them?
Gateways act as bridges between internal data sources and Azure Cloud Services.
Personal Gateway: Used by only one person, data can be imported and valid only in Power BI.
On-Premises Gateway: It is an advanced form of personal gateway that supports Direct Query and can be used by multiple users to restore data.
Mention some Power BI applications
Power BI has several applications; some of them are as follows:
-
Business analysis
-
Data analysis
-
Database administration
-
IT professional
-
Data Science
11. How can you plot a story in Power BI?
Every graph or visualization report generated is collected and represented on a single screen. This approach is called a Power BI dashboard. The dashboard in Power BI is used to display the story.
12. What are KPIs in Power BI?
KPI is abbreviated as Key Performance Indicator. Every professional organization has teams, and employees follow KPI protocols. Organizations set KPIs for all employees. These KPIs take measures of their targets. These KPIs differentiate from the previous performance, and progress is analyzed.
13. What is Slicer?
Cross-sections are an integral part of a business report generated with Power BI. The slicer function can be considered similar to the filter function. Still, unlike the filter, the Slicer can display a visual representation of all the values ??, and users can choose from the available menus in the slicer drop. -bottom menu.
14. Explain Power BI Designer.
This is a combined solution for uploading reports and dashboards. It contains Power Pivot, Power Query, and Power Table.
15. What are the different Excel BI add-ins?
The most essential Power BI add-ins to Excel are as follows:
-
Power Query Power Query helps edit, load, and find external data.
-
Power Pivot This is primarily used in data analysis and modeling.
-
Power View This is used to design and create interactive visual reports.
-
Power Map Power Map helps to show insights on 3D maps.
16. What is query composition in Power Query?
Query composition is called when the steps described in Power Query are supplied in SQL and implemented by the source database instead of the client computer. Query composition is critical to processing performance and scalability.
17. Can SQL and Power Query/Query Editor be used together?
Both SQL and Power Query/Query Editor can be used together by defining a SQL statement as a Power Query/Query Editor source. This helps ensure that you get a good database query in your head. It also helps avoid unnecessary complexity and processing by the client’s computer.
18. What language is used in Power Query?
M-code is the language that is used in Power Query. It is used directly and is very similar to other programming languages.
19. What are the most common data shaping techniques?
The most common data shaping techniques are:
20. Is Power BI available on-premises?
No. Power BI is not available on-premises as a private cloud service. However, you can securely connect your on-premises data sources to Power BI and Power BI Desktop.
Final Thoughts
Interview questions play an important role when it comes to preparing for a dream role you always aspire for. We hope this blog has helped you in realising the top 20 Power BI interview questions along with their relevant answers. Best of luck for your future endeavours and keep learning as that’s the way to succeed.
Advanced Certification in Applied Data Science, Machine Learning & IoT By E&ICT Academy, IIT Guwahati
9 months
Certification in Data Science and Machine Learning With Python By The
IoT Academy Noida
180 Hrs
