Power Bi Developer Interview Questions

Power Bi Interview Questions

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When interviewing for a role involving Power BI, a business intelligence and data analytics platform created by Microsoft, you should be ready to answer a wide variety of questions. Professionals as different as business analysts, financial analysts, construction managers and government administrators use Power BI to analyze and visualize diverse types of data. An interview for one of these roles will likely involve questions about your data analysis experience as well as your understanding of Power BI’s components.

In this article, we present 40 different Power BI interview questions along with sample answers to help you prepare no matter what field you are in.

What Is Special Or Unique About The Calculate And Calculatetable Functions

Ans: These are the only functions that allow you modify filter context of measures or tables.

• Add to existing filter context of queries.
• Override filter context from queries.
• Remove existing filter context from queries.

Limitations:

• Filter parameters can only operate on a single column at a time.
• Filter parameters cannot reference a metric.

What Are The Available Views In Power Bi

Three perspectives are available in Power BI Desktop:

Report View: The first option is the Report view, which is at the top of the list. Its also the default view, so itll be the first thing you see when you launch Power BI Desktop. Creators use this view to produce visual reports based on their data. This is the screen on which many creators spend the most time. While in this view, you can also add many pages to a single report so that if you ever distribute these models via Power BI Service, you can have all of your associated data in one place.

Data View: The option in the center is the Data view. You may see your data in the Data view once youve taken the time to model it. Data view sets it out piece by piece in a grid structure rather than displaying your images like the ones youve developed. The Data view can assist you in gaining additional insights into your data so that you can evaluate it from various perspectives. This way, you can make the most of your data understanding and make the best judgments possible based on it.

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How Do You Work With Large Datasets In Power Bi

There are a few different ways to work with large datasets in Power BI. One way is to use the “Query Editor” to filter and aggregate the data as needed. Another way is to use “DirectQuery” mode, which will directly query the underlying data source.

Think about:

• Give an example of a particularly large dataset you had to work within Power BI.
• What new challenges did you encounter with this data set?
• How did you interact with it?

Interview Questions For Power Bi Developer

What are some of the most important and frequently asked questions for Power BI developers ?

• what are the core concepts that asked in an interview ?

• what are the scenario based questions asked in Powerbi interview ?

My experience: Total 1.6 Year’s of Experience

• 1 year with Excel, Google Analytics

• 6 months as Power BI developer

Any helps would be greatly appreciated, Thanks

If I would interview someone about a BI role, particularly Power BI, I would ask the following questions/let them explain it to me. Some of the concepts I would consider advanced, but you should have heard about it. All of this can be learned within half a year but you have to be intrinsically motivated to learn this stuff.

Possible questions would be:

Not a powerbi developer but know enough to make reports that are more useful than a pivot table. Taking a stab at these, though some of these feel very book theory, or I am super ignorant of them.

Not familiar with row vs filter context, a guess would be I have run into issues with dax when the result is per row so you have to create a new column rather than just get your answer. So a row context would be across all your data per row. Filter context would be more like miniature tables of new data that are created based on your filtering.

No pipelines.

No 3rd party.

IT/HR reports.

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How Can Geographic Data Be Mapped Into Power Bi Reports

Through a map chart and a filled map chart, Power BI makes it possible for users to visually map geographic data, both globally and regionally.

• Power BI integrates with Bing Maps to find default coordinates for locations in a process known as geocoding.
• This integration means that users do not need to provide longitude and latitude coordinates.

What Kind Of Projects Are Included As Part Of The Training

Intellipaat is offering you the most updated, relevant, and high-value real-world projects as part of the training program. This way, you can implement the learning that you have acquired in real-world industry setup. All training comes with multiple projects that thoroughly test your skills, learning, and practical knowledge, making you completely industry-ready.

You will work on highly exciting projects in the domains of high technology, ecommerce, marketing, sales, networking, banking, insurance, etc. After completing the projects successfully, your skills will be equal to 6 months of rigorous industry experience.

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What Are Custom Visualizations

Power BI Pro users can create their own visualizations from the custom visualizations library. First, a development project will have to be created and then the visual can be tested in Power BI services. As soon as the custom visualization is created, it is thoroughly tested before posting. It is saved as a .pbiviz file before sharing.

Explain The Dax Function

A DAX function is a predefined formula that performs calculations on values provided to its arguments. The arguments in a function should be in a specific order and can be a column reference, text, numbers, constants, etc. Every function performs a particular operation on the values enclosed in an argument. There can be more than one argument in a DAX formula.Some of the most commonly used DAX functions:

Date and Time Functions

These functions carry out calculations on the date and time values.

Ex: DATE, CALENDER, HOUR, MINUTE

Time Intelligence Functions

These functions are used to evaluate values over a fixed period.

Ex: DATESBETWEEN, ENDOFQUARTER, CLOSINGBALANCEMONTH

Information Functions

These functions provide particular information on the data values included in rows and columns. It checks the given condition in a function for the given value and returns TRUE or FALSE.

Ex: ISERROR, CUSTOMDATA, ISNONTEXT

These functions are used to evaluate an argument or expression logically.

Ex: AND, FALSE, IFERROR, IF

Mathematical and Trigonometric Functions

These functions are used to perform all sorts of mathematical functions on the reference values.

Ex: DIVIDE, FACT, ACOS

These functions carry out statistical and aggregation functions on data values in a DAX expression.

Ex: AVERAGE, COUNT, GENERATE

These are similar to the string functions of Excel.

Ex: FIND, LEFT, FIXED, FORMAT

Parent-Child functions

These are used for data values that are a part of a parent-child hierarchy.

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Name The Data Sources Can Power Bi Can Connect To

Several data sources can be connected to Power BI, which is grouped into three main types:

It can import data from Excel , Power BI Desktop files and Comma-Separated Values .

These are a collection of related documents or files stored as a group. There are two types of content packs in Power BI:

• Content packs from services providers like Google Analytics, Marketo, or Salesforce and Content packs are created and shared by other users in your organization.

Connectors help you connect your databases and datasets with apps, services, and data in the cloud.

Free Course: Introduction to Data Visualization

No Of Portals & Centers Available For Administering Power Bi

Portals and centers are User friendly GUI tools available for organization which running in the cloud and will help in providing access, managing users and security.

• Power BI Admin Portal: This portal helps to manage User metrics, Users, Audit logs and tenant settings and Premium capacity settings in organization.
• Office 365 Admin Center: This center enables to manage users, configure, setup, groups and licensing, monitoring activities and see descriptive reports.
• Office 365 Security & Compliance Center: This center will help to protect data by providing right roles & permissions to users and also comply with legal by following regulatory standards.
• Azure Active Directory in the Azure portal: AAD is basically to manage Identity and Access Management which helps organization to provide maintain Single Sign On id for their users. In this portal, admin can add, remove, restrict the access for users user groups security groups in the organization.
• Powershell Cmdlets Administrative APIs & SDK: This part of azure portal, where admin can manage the users, user groups, security groups, etc.. by command-lets instead of GUI.

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How To Connect Jira To Power Bi

We connect to JIRA using JIRA content packs and JIRA Rest API. There are a few steps involved.

What Do You Mean By Grouping

Power BI Desktop helps you to group the data in your visuals into chunks. You can, however, define your groups and bins. For grouping, use Ctrl + click to select multiple elements in the visual. Right-click one of those elements and, from the menu that appears, choose Group. In the Groups window, you can create new groups or modify existing ones.

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What Are The Data Management Gateway And Power Bi Personal Gateway

Ans: Gateway acts a bridge between on-premises data sources and Azure cloud services.

Personal Gateway:

• Import Only, Power BI Service Only, No central monitoring/managing.
• Can only be used by one person cant allow others to use this gateway.

On-Premises Gateway:

• Import and Direct Query supported.
• Multiple users of the gateway for developing content.
• Central monitoring and control.

How Important Is Power Bi

Dashboards, datasets, and reports are the heart of Power BI, and they enable users to create personalized dashboards combining cloud-born and on-premises data in a single view. It allows monitoring the most important data enterprise-wide and from all their business apps.

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Why Use Power Bi

Power BI provides a simple setup to connect, transform, and visualize the raw business data from multiple sources. Even non-technical users can extract valuable information from their business data and use it to make better decisions. It provides a secure cloud service that enables the user to view dashboards, reports and share them with other business users and stakeholders in real-time analysis.

Power BI provides AI features in the form of Power Query and Power Q& A. With Power Query, you can create the dashboards by simply typing in the columns and the visuals you want to include. While Power Q& A allows you to analyze your data by giving voice commands.

Small businesses can use Power BI Desktop to visualize their business data without spending their time and money in maintaining a separate team for data analysis.

What Are The Various Types Of Users Who Can Use Power Bi

• Report Consumers: They consume reports according to their particular needs.
• Report Analyst: They require detailed data for their analysis of the reports.
• Self-Service Data Analyst: They need an in-depth analysis of the data to work with.
• Basic Data Analyst: They are able to build their own datasets.
• Advanced-Data Analyst: They can write SQL queries and bring hands-on experience in Power BI.

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Power Bi Interview Questions: Power Bi Structure

In this section, well consider some typical questions related to Power BI. Theyre mostly basic, but they can sometimes be misleading. Indeed, terms get confused often, like building blocks,components,views, or elements of Power BI. Some terms even get used interchangeably, or there isnt a standard term . Fortunately, the question itself usually offers some context on what exactly is in question.

11. What are the main elements of the Power BI package?

There are three main elements of the Power BI package:

• Power BI Desktop a Microsoft Windows desktop application used to create interactive dashboards and reports for further sharing
• Power BI Service an online SaaS used for publishing reports to the cloud
• Power BI Mobile Apps available on any device, with native mobile BI apps for Windows, iOS, and Android, so that mobile users of Power BI can view the insights

On the Model tab, we can edit specific column and table properties by selecting a table or columns, and we can transform the data by using the Transform Data button, which takes us to Power Query Editor.

12. What are the building blocks of Power BI?

Everything we do in Power BI breaks down into the following basic building blocks:

13. What are the main components of the Power BI toolkit?

Here are the main components of the Power BI toolkit and what we use them for:

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

There are three connectivity modes in Power BI:

What Is The Advanced Editor

Advanced editor is used to view queries that Power BI is running against the data sources importing data. The query is rendered in M-code. Users wanting to view the query code select Edit Queries from the Home tab, then click on Advanced Editor to perform work on the query. Any changes get saved to Applied Steps in the Query Settings.

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What Are The Different Power Bi Tools And How Are They Used

Some of the common tools in Power BI are built-in connectors, Power query, AI-powered Q& A, Machine Learning models, quick insights, and integration of Cortana. The built-in connectors in Power BI allow the user to connect with both On-premises and On-cloud data sources including Salesforce, SQL Servers, Microsoft, and more.

Power Query helps you integrate the reports and share them on the internet. Cortana integration will allow you to run queries by giving voice commands. In addition, Power BI offers advanced analysis, Machine Learning, and other AI tools to create live dashboards and check your performance in real-time.

What Are The Various Refresh Options Available

Four main refresh options are available in Power BI:

• Package/OneDrive refresh: This synchronizes Power BI desktop or Excel file between the Power BI service and OneDrive
• Data/Model refresh: This means scheduling the data import from all the sources based on either refresh schedule or on-demand.
• Tile refresh: Refresh the tiles cache on the dashboard every time the data changes.
• Visual container refresh: Update the reports visuals and visual container once the data changes.

• Teradata Database

Live Connection: Live connection is analogous to the direct query method as it doesnt store any data in Power BI either. But opposed to the direct query method, it is a direct connection to the analysis services model. Also, the supported data sources with live connection method are limited:

• SQL Server Analysis Services Tabular
• SQL Server Analysis Services Multi-Dimensional
• Power BI Service

Import Data : By choosing this method, you upload the data into Power BI. Uploading data on Power BI means consuming the memory space of your Power BI desktop. If it is on the website, it consumes the space of the Power BI cloud machine. Even though it is the fastest method, the maximum size of the file to be uploaded cannot exceed 1 GB until and unless you have Power BI premium .

But which model to choose when depends on your use and purpose.

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How To Remove Null Values In Power Bi

In order to remove null Values from the data can be removed in the Power Query Editor window on the Power BI desktop. There are multiple ways to remove null values:

Interview Questions & Answers Series For Bi Developer

Q& A Videos

• Question 1 What is ETL Process with example?
• Question 2 Difference between control flow and data flow in SSIS?
• Question 3 Explain the architecture of SSIS?
• Question 4 Explain the types of Perfmon counters for SSIS?
• Question 5 Explain the types of Cache Mode in SSIS Lookup component?
• Question 6 How to do Error Handling in SSIS.
• Question 7 Types of Containers in SSIS.
• Question 8 How to do SSIS Package Deployment to SQL Server?
• Question 9 What are Transactions?
• Question 10 What are Checkpoints?
• Question 11 : What is Logging in SSIS?
• Question 11 : What is Logging in SSIS?
• Question 13 : Difference between Merge and Union All?
• Question 14 : What is the Data Profiling task?
• Question 15 : What is Precedence Constraints?
• Question 16 : What is Merge Join and explain its different types of Joins?
• Question 17 : Difference between OLTP & OLAP.
• Question 18 : What is Fact, Dimension, Cube, Star Schema and Snow Flake?
• Question 19 : How to create a Cube in SSAS?
• Question 20 : What is SCD?
• Question 21 :- What is CDC?
• Question 22 :- What is SSRS, what is Data Region, can embed/display SSRS Reports in any application, File extension and Code behind of SSRS Report.
• Question 23 :- How to Deploy SSRS reports?
• Question 24 :- Difference between Tabular and Matrix Report.
• Question 25 :- What is Page Break in SSRS?
• Question 26 :- Difference between Drilldown Report & Sub Report.

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