Top Power BI Interview Questions 2024 | Power BI Interview Questions And Answers | Simplilearn

hey everyone welcome to Simply learn today we will learn about the powerbi interview questions and answers so PBI is one of the most trending VI tool in the business industry today and most of the data analysts are supposed to have a comfortable understanding of PBI bi tool so if you are about to to attend an interview for a data analyst or a powerbi developer a small set of powerbi interview questions and answers are found to be the most frequently asked questions so those important questions will be dealt in this particular session today before we get started if these are the type of videos you'd like to watch then hit that like And subscribe buttons and the bell icon to get notified just for a quick info craving a career upgrade subscribe like and comment below dive into the link in the description to FastTrack your Ambitions whether you're making a switch or aiming higher simply learn has your back if you want to upscale yourself in master data analytics skills and land your dream job or growing your career then you must explore simply learn scit of various data analytics programs simply learn offers postgraduate programs from pero University in collaboration with IBM through this program you will gain knowledge and work Work Ready expertise in skills like prescriptive and Predictive Analytics regression classification and over a dozen others that's not all you also get the opportunity to work on multiple projects and learn from industry experts in Top Tire product companies and academic from top universities after completing these courses thousands of Learners have transitioned into a data analytics role as a fresher or moved onto a higher paying job profile if you are passionate about making your career in this field then make sure to check out the link in the in comment and description box below to find a data analytics program that fits your experience and areas of Interest now without further delay let's get started with the interview questions for today's session firstly the first question is what are the different types of filters in powerbi reports so if you are an experienced candidate or a beginner these type of interview questions are the ones which are definitely going to face so coming to the answer what are the types of filters you'll be facing in papia reports so there are three main filters available in powerbi which are visual level filters page level filters and Report level filters which are almost self-explanatory so if you want to be someone who stands out out of the group just mention a couple of more like slices which can be also which can also act some type of filters there right so visual filters page filters and Report level filters are the three main types and if you want to add onto it you can also add in some slices right now let's proceed to the next question explain DXs in PBI so what exactly is the meaning of tax and to improvise your question uh or to improvise your answer or if you want to outperform you can also explain with some of the explanations or implementation of Dax in your nearest examples like if you are working if you're a beginner or if you're a fresher if you're working on a portfolio then you can give the example of your tax implementation on that portfolio or if you're an experienced candidate just explain your latest implementation of Dax in your previous projects so the answer for this question is Dax is basically the full form for data analysis expressions and is a Formula language used in PBI P pivot and SQL Dax includes functions operations and constants that can be used as a formula expression to calculate and written one one or more values so Dax just understand it in this way right so if you are about to perform an analysis or if you're about to extract some insights for example you own a Superstore right and you wanted okay let's assume that you own a Superstore and you have five regions north south east west and Central and you are U providing um products from uh few categories let's say it mobile phones desktops everything and now you wanted to identify one zone which is giving you highest sales in Mobile phones and you wanted to identify one zone which is giving you least sales in um mobile phones in such scenarios you can just write up a formula equals to um mobile phones product and M you know product uh minus products which are less than a number specific number you you actually wanted to identify a products less than um 100 U mobile phones right you just want to know if there is any region which is uh selling less than 100 mobile phones then you can extract that so the expression what you're writing there is nothing but a tax expression so apart from this example you can also put up some complex examples if you're an experienced candidate or if you're a fresher then you can come up with some Dax Expressions that you buil on your portfolio projects moving ahead we'll discuss the third question how does powerbi integrate with other tools and services so there might be a situation where you might have to get connected to different sources of data right so let's say you wanted to import Excel data as well as some service like a cloud service you want to extract data from a cloud service as well so how can you do that and if you want to do that can you do it right so that's the question so basically this is a kind of question which comes up from two different zones can you integrate or can you connect to two different sources of data or in case if you can connect how to connect right so it's it's like is it possible to connect there's also question to beginners to test your knowledge on the fundamental knowledge and prob I they want to know if you can connect data from two different zones it's not like two Excel sheets they want to know from two different platforms Al together let's say I have data and Azure let's say I have data and SQL so can I connect them both yes you can do that so the answer for this question is PBI offers extensive integration capabilities with various Microsoft products like Azure Excel SQL and some third party Services as well like a website any application or uh database SQL databases Excel spreadsheets and other cloud services like gcp AWS Etc so that's possible so you just have to let's go for a demonstration on this not a complete demonstration let's cancel this so here if you just it's it's just like a overview how to connect so here if you see we have Excel workbook semantic models data flows data was SQL Server web o data feed plan query and if your uh source is falling different from these available ones you can just click on more and select any one of these options right here correct so uh with that let's get back to the next question what are the differences between PBI desktop and PBI service so the terms are self-explanatory if you're an experienced candidate then you can Define the answer right away but if you're a beginner especially if you're a fresher then you must be a little cautious so if you are building your portfolio if you are learning the fundamentals of powerbi then you are doing it using powerbi desktop right but if you are a professional or an experienced candidate then you are developing the interactive dashboards you are developing the interactive charts and graphs and everything and you are providing that visual only visual only the dashboard to your end user who is your client so in that scenario your client will be given the powerp service module right so they will be having a service access only just to watch the visuals so the answer for this question is powerbi desktop is a free application so it's not completely uh free so there are in situ there are uh situations where you might have to deal with some huge data or you have to deal with some uh parameters like security everything in those scenarios you might have to go with the licensed version so for a learning purpose it is free application installed on a local system that lets you connect to transform visualize modularize your data and few more uh implications that you can do and on the other hand powerb service is a cloud-based service that allows you to share as discussed only to share and collaborate on uh and distribute your power reports and uh dashboards with others within your organization so client is partially a part of your organization because he has some business to do with your organization so basically understand it in this way powerbi desktop is something which allows you to build it will give you the blocks you build the visualization and then you give a screenshot or you give a picture of that particular build to the end user you can have a visual on it how it is performing it doesn't have to worry about how it is working in the background he doesn't have to worry about how big or how um large is your data set how it is extracting what API is it using what's the he doesn't care about it all he cares about is the visual how is his business doing so in that scenario you just want to give a picture that's when you use the power service now let's go with the next question how do you handle Security in powerbi so this is a question given to the experienced candidates so you can think about it about the access rowwise access let's say you are the leadership team and next is the manager next is the uh individual contributor correct so here the full access the full visuals of your business how your business is going on how are the leads how are the revenue how is the RP how's the traffic everything is visible to the uh leadership or the manager correct but when it comes to the IC or individual contributor who is just working on traffic he will have access only to traffic not the leads not the revenue generated not the uh RPL and everything because he has nothing to do with it and that is something which you can't reveal to an IC for data security purposes so it you can also consider this in the way of inheritance right so uh you can divide it based on the level of the employee right so level wise you can provide the access to your employee to your manager uh if you're a developer let's say So based on the employee level based on the manager level based on the leadership team you can give separate access to separate candidate so the answer for this question is powerbi provides Ro level security RS which allows you to control access so you're basically controlling the access to the data for different users within your organization you can Define rules on the data set that filter the data based on the user R additionally PBI integrates with Microsoft asure active directory to provide authentication and authorization now the sixth question what is a Content pack and powerbi content packs are type of package that includes a related set of dashboard report and data elements they used to share insights reports and data sets with colleagues and organization within a broader audience powerbi also offers organizational content packs which allows you users to quickly connect and analyze data from popular business applications so basically content pack you can imagine content pack as a set of charts graphs or a complete dashboard or data set elements so when you integrate all those inside a bubble that particular bubble can be considered as a Content flag now moving ahead we have the 7eventh question describe a scenario where you improvised performance of a powerb report so let's say this is uh so basically before we answer this question this question is for an experienced candidate not for an intermediate or not for a beginner L right so if you are someone who has three to four years of experience that is when this kind of questions are shooted so explain a scenario where you improve the performance of a Baria report so there are certain scenarios where let's say you're working with a uh business data Amazon sales data so you have Amazon sales data or any other data for a beginner purpose okay let's say some XYZ company so you're working with XYZ company and you have a sales data from Up past couple of years and uh your client asked you ke last year this particular dashboard was working fine but down the line when we entered the new quarter or new an annual year I can see there is some discrepancy or I can see there is some delay for the powerbi dashboard to load now there can be multiple reasons for this the first reason could be the hardware setup or uh uh maybe the data is increasing day by day so the hardware is not supporting so that could be one reason and provided if uh there are some visuals which are already created visualizations or graphs or dashboards and we are not most mostly using them so those can be one of the reasons so in these scenarios you can just give some uh explanations which you already faced in your current Organization for example like you can say uh the client is not willing willing to uh scale up the hardware like the the hardware which stores the data or something like that is not ready to scale of the hardware but he wants to use the same Hardware but he wants you to increase the speed in this scenarios you can eliminate the data which is not currently in use let's say you're using 2020 21 22 23 and 24 data now all you focus on as the year on-ear growth so you just need 2022 2023 and 2024 not 1 and 12 right you can erase that data from your existing Hardware or servers this will ease up the load on power bi and automatically there should be an increase in speed another one if you have already created some visualizations which you're not currently using let's say you already created two to three dashboards and you rely on One dashboard alone not the rest of those two you can delete those visualizations so something like that which can help you but to consider this question as an assignment I would like the viewers who are an experienced data analyst to answer the question in your way possible so that the viewers can benefit from multiple answers so you can write down few scenarios where you face this problem and how you solved it it can be a oneline answer it can be a points which you can mention right a set of points which you can mention that helped you to improve the performance of your PP end report so the answer for this question which I have is in one scenario I improve the performance is by optimizing data model reducing the number of unnecessary columns and rows in data sets and dazing summary tables to decrease the data volume that needed to be processed I also replaced complex calculations in the report with simple ones which uh were possible and used direct query mode for realtime data requirements to speed up a report loading times so this can be a good answer you can also add up some answers from your end as well to benefit the viewers now let's go with question number eight explain the difference between measure and a calculated field so this can be an important question for freshers especially right so me personally I've asked this question to the candidates many times so the answer could be a little tricky right so most oftenly the question can be asked as what's the difference between measure and calculated column or measure and a calculated field or measure and dimension right so the answer should be like this just pay attention to what the answer you know interviewer is asking you and answer wisely if he's asking you the difference between measure and dimension it's clear self-explanatory so something like measure is something which can be measured the number is a measure let's say the salary is a measure the average of uh marks obtained is a measure marks obtained in a specific subject is a measure measure rate of interest is a measure traffic is a measure right so when it comes to Dimensions something like a character data type maybe and name of the store and let's say we didn't have we had various regions in the previous question north south east west central this particular data which cannot be measured is called as a dimension now for this question here what's the difference between measure and a calculated column so calculated column is something which you generate out of a calculated field right whenever you try let's say you have the quantity and you have the price but you don't know rate of each product correct in such scenarios you can write up a calculated field and build a new column called rate of product that particular column is a calculated column which is newly generated after writing a calculated field so the answer for this question is calculated column creates a new column based on existing data using formula it adds to your new you know it's add to your existing table as a new column as we discuss measure creates a dynamic calculation that summarizes your data measures are used in visualizations to analyze Trends or answer specific questions now with this let's move on to the next question describe the process of publishing a powerbi report to service now this can be an answer for both I mean this can be a question for both fresh as well as experienced so U now you can give it a try you can give me the answer for this you can write down your answers in the comment section below and U everybody has their own way of answering this question but as simple as that let's keep it normal now in powerb and desktop go to publish and choose public vs service select the workspace to publish and configure settings like sharing access click publish to upload your report of V service so this is the answer given by most of the experienced candidase but when it comes to pressures it's okay if you answer in this way create multiple charts create multiple graphs understand the requirement of the end user build the require required charts and graphs integrate all those charts and graphs to the dashboard it's also a good way to tell it but if you're an experienced candidate or if you're a beginner just try to include these points as well just go take a step ahead and go a step further and answer include these points in your answer go to publish select powerbi service select workspace right so these will enhance your answer and make a stand out from the other crowd now let's continue with the 10th question how would you handle missing data in powerbi so this can be answered for both you know this can be asked for both beginners as well as U experienced candidates so it's obvious if you're a DAT data analyst it's obvious that your data will not not have complete uh completely filled rows and completely filled columns all right there is a possibility that you might have blank rows there is a possibility that you might have blank cells there is a possibility that you might have irrelevant data there is a possibility where it can be a typing mistake and you might insert special symbols in place of numbers and special operators in place of alphabets everything is possible so in such scenarios how could you handle right so there are multiple approaches so let's say if you are going through some column which you feel is not mandatory to create your report you can ignore those uh cells and you can just delete it and uh in case of there is um a discrepancy in your existing data and you find that is important then you can always have a way to go back to The Source Who provided you the report or Who provided you the data as to complete them ask to give them them the right number or in few scenarios you can also if you don't want to eliminate any kind of rows and columns you can also have an option of taking an aggregate value in it maybe the minimum value maybe the maximum value may be an average value in that particular missing cell so there are multiple possibilities and if you feel like adding those answers you can also feel free to add them so that everyone is benefited so uh my kind of answer is there are several ways to hand handle missing data filtering where you can exclude simply that's the first one you can just ignore those and exclude those missing values replace missing values with some aggregate values custom logic create a tax formula to address missing values based on specific scenarios now let's move ahead with the next question how do you connect multiple data sources to a powerb report so the answer is PBI allows connecting various data sources you can directly import directly use live connections or create composite mod model to improve and combine data from different sources so this is not just the powerp dashboard you're here I mean it's not just the powerbi desktop you're not just importing data it's related to the realtime dashboard report so if you have a report and you are ought to connect some external Source some realtime streaming data you can do that using some live connections and apis now let's move with the next question what are data Flows In powerbi so the answer for this question is data Flows In powerbi are cloud-based preparation and management tools that allows users to ingest transform integrate and enrich Big Data from various sources they are designed to simplify data preparation and enable scalable data integration and storage across multiple powerbi projects now the 13th question how can you handle data updates in so this is also one of the simplest but also the trickiest question let's say you already connect let's say let's we are dealing with Excel data and your client provided you the Excel data and you already created a dashboard out of it and out of your knowledge you don't know right uh you might not know what happened after they share to the data and the client gets to know there there is some discrepancy there is some irrelevant data or there is some missing value in the data provided to you and they add it and you missed it correct in those scenarios how can you handle data updates right you can either refresh there are multiple answers for that so let's go with the answer so data updates in powerbi can be handled through scheduled refreshes or realtime streaming data sets schedule refreshes so let's say you provide some six day or one week or one day based on requirement you provide a scheduled refresh and it will uh act upon it and it will refresh its source every single time it basically refreshes the dashboard you created it will extract the data from the source and it will um create a new report out of it so schedule refreshes can be configured in powerbi service allowing data to be updated at specified intervals realtime streaming data sets can be used for dashboard tiles that require continuous UPG updates now the 14th question on our list can you explain the concept of a Slicer in PBI right so those who already are comfortable with Excel they might know the answer for this so it's completely similar right so let's discuss the answer a slicer is a powerbi visualization used to filter the data basically it's nothing different from Filter right it's just an option like a drop down that you create in Excel using the data validation that's the same in PBI as well as Excel you just have an slicer option where you can provide your selection and it will give you an ENT report so basically it's it's a filter so it provides a way for users to filter the data that is displayed in other visualization on a report page slicers offer a more interactive and intuitive way to make selections and see the data that changes dynamically as selections are made let's say you have a class 10 class 9 Class 8 and you wanted to just check the results of Class 8 you just select the option of Class 8 on the slice on and you have the report so that's how it basically works now the last question for today's session what is direct query in PBI so the answer for this question is direct query is a connection type in powerbi that allows you to directly connect to a supported data source enabling realtime reporting capabilities without without importing or copying data into powerbi while it offers up to-date data it also limits certain functionalities and might impact Performance Based on the query load on the source system so with that we have finished the top 15 papia interview questions and answers that are frequently Asked in a data analyst interview provided for both freshers as well as experienced should you feel that we miss out on any of the important questions that you might have faced already faced in your previous interviews please feel free to let us know in the comment section below and so we can have them answered or you can also provide us the anwers so that it can benefit both of us and also the viewers now having said that we have come to the conclusion of this session should you have any queries regarding any of the topics covered in the session or if you require the resources like the pbd of questions that we enlisted in this session or if if you have any other concerns please do let us know in the comment section below and our team of experts we'll be happy to address them as early as possible until next time thank you for watching and stay tuned for more from simp staying ahead in your career requires continuous learning and upskilling whether you're a student aiming to learn today's top skills or a working professional looking to advance your career we've got you covered explore our impressive catalog of certification programs in cuttingedge domains including data science cloud computing cyber security AI machine learning or digital marketing designed in collaboration with leading universities and top corporations and delivered by industry experts choose any of our programs and set yourself on the path to Career Success click the link in the description to know more hi there if you like this video subscribe to the simply learn YouTube channel and click here to watch similar videos to nerd up and get certified click here

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Id: C29hNcQgi3E

Length: 29min 9sec (1749 seconds)

Published: Mon Apr 08 2024