power bi interview questions: 40 Power BI Interview Questions (With Sample Answers)

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    2023-04-30T14:14:45+00:00
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    power bi interview questions: 40 Power BI Interview Questions (With Sample Answers)

    Introduction

    If you’re interviewing with Power BI, you’ll likely have to answer a few questions about how to use the platform. This can be intimidating at first: after all, there are hundreds of features that you can use in Power BI! However, once you get the hang of it, it’s easy to see why it’s so popular among data analysts and business owners all over the globe. We’ve assembled some sample answers for some common interview questions that come up during job interviews for power bi

    What is Power BI?

    Power BI is a cloud-based business analytics service. It’s a self-service business intelligence tool that allows you to create interactive reports and dashboards with live data from multiple sources. Power BI also includes advanced analytics features, such as predictive analysis and machine learning capabilities.

    Power BI can be used by nontechnical users to create reports and analyze data without having to write code or connect to multiple systems. You can also use Power Query for Excel if you need more flexibility than what’s provided by Power Pivot in Excel 2013 or later versions (you’ll need a Pro license).

    What are the benefits of using Power BI?

    • Connect to any data source.
    • Visualize and analyze your data.
    • Easy to use, even for people without a technical background.
    • Free with a free trial option that allows you to try out the service before purchasing it (if needed).
    • Powerful visualizations that allow you to drill down into details of your data or zoom out for an overview of all your business metrics at once.

    How do I connect to data using Power BI?

    You can connect to data from different sources using Power BI. The first step is to use the Data Connection Wizard, which provides a guided walkthrough of creating a connection. You can import data from an Excel file, or another database like SQL Server or Oracle. In addition to these options, you can also create connections directly in Power BI Desktop and connect other sources like web services and text files.

    Why should I use Power Query instead of Excel to connect to my data source?

    Power Query is a free tool that you can use to connect to your data source. It’s a lot easier to use than Excel and can be used on any device, so it’s great if you’re working remotely or traveling.

    You’ll be able to connect with any data source that isn’t supported by Excel, including enterprise systems such as Salesforce and Google Analytics.

    When is it better to use DirectQuery instead of the DAX language in Power BI?

    When you’re using the DAX language, it’s important to remember that any changes you make in your model can potentially have an impact on performance. The more complex your calculations are, the slower they’ll run. This is because every time someone views your report and presses a button, Power BI has to recalculate all those formulas from scratch.

    DirectQuery is much faster than DAX because it doesn’t require any calculation at all; instead of calculating with formulas each time someone makes a change or opens up their report, DirectQuery pulls data from its source and displays it immediately without having to recalculate anything first (though there may still be some lag if too many people access your report at once).

    How can I take advantage of dynamic tables in Power BI?

    Dynamic tables are a great way to create a dashboard that is dynamic and can be customized to suit the needs of individual users. They allow you to create an interactive experience for your users. For example, you could use them for sales dashboards where each user’s sales data is displayed in their own unique table based on their role in the company, or perhaps even by location or product line.

    Dynamic dashboards are great because they’re highly customizable; however, when creating one from scratch there are many considerations that must be taken into account before starting work on your first one (e.g., what kind of data source should I use?).

    How can I add a visualization to an existing dashboard in my workbook, rather than adding it when creating a new dashboard?

    You can add a new visualization to an existing dashboard from the ribbon or from the context menu.

    • Click on your dashboard to select it and then click on any empty space in your workbook. This will bring up the New Visualization window, where you can select which type of visual you want to add (Table, Chart and so on).
    • You can also right-click on an existing visualization and select “Add Visualization” from the context menu that appears.

    How do I know if my data has been refreshed on the server?

    • You can check the refresh status of your data source by selecting the Data tab and then clicking Refresh.
    • You can also check the refresh status by right-clicking on your data source and selecting Refresh.

    What should I consider when retrieving content from your external search service into Power Query (M)?

    When retrieving data from an external search service, you should consider the following:

    • The source of the data. Is it reliable and accurate? Does it contain only relevant results to your query? Are there any privacy concerns with exposing your users’ search terms in this way?
    • The type of data being retrieved. For example, if you’re retrieving user-generated content (UGC) and want to make sure that all user names are consistent across all platforms (e.g., Twitter and Facebook), then use a tool like Power Bi Service Connector for UGC Analysis instead of M for this purpose because it uses machine learning algorithms based on Natural Language Processing (NLP) techniques such as Named Entity Recognition (NER) which can identify entities such as names or locations within text documents

    What is column linking and why should you use it during analysis and reporting?

    Column linking is a feature in Power BI that enables you to automatically link two or more columns of data together. For example, if you have sales data for each month and want to compare this with costs, column linking can help by linking them together so that you can easily see how much money was spent on each sale. This is useful when comparing values across different columns of data because it removes the need for manual manipulation of the data which would otherwise be needed if they were not linked together by column links.

    Column Linking can also be used when working with geographical information such as country regions or states within those countries; this allows end users who don’t know anything about geography (or even just people who don’t want too) still be able to gain insight into what regions are performing best based upon another variable such as sales volume etc…

    These are common questions asked during interviews with power bi

    The following are common questions asked during interviews with Power BI:

    • What is Power BI?
    • How can I use Power BI to connect my data sources, such as SQL Server and Excel?
    • When should I use DirectQuery instead of DAX language in Power BI?

    Conclusion

    To conclude, we hope these 40 Power BI interview questions have helped you get prepared for your next job interview. We know how important it is to be prepared, so if you want to learn more about Power BI and how it can benefit your organization then check out our other blog posts!

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