Power BI Interview Questions – Set 01

Which language is used in the Power Query?

A new programming language is used in power query that’s called M-Code. It is very easy to use and similar to other languages. M-code is a case sensitive language.

What is self-service Business Intelligence?

SSBI refers to self-service Business Intelligence.

  • SSBI is an approach to the data analytics which enables business users to segment, filter, and analyzes the data.
  • SSBI has made easier access the data to the end-users and create various visuals to get better business insights.

What is DAX?

DAX (Data Analysis Expressions) is a formula expression language. It can be used in different BI and visualization tools. DAX is also known as function language in which the full code is kept inside a function.

  • DAX works on column values.
  • DAX cannot insert or modify the data.
  • We can create a calculated column and measures with DAX, but we cannot calculate rows using DAX.

Differentiate between the Power BI and Power BI Pro?

Power BI offers distinct kinds of features to help get started in searching for data in a completely new way.

And Power BI Pro comes with some additional features like scheduling data, storage capacity, live data sources, along with complete interactivity and much more.

What is Power Map?

Power Map is an Excel add-in which provides a powerful set of tools to help you in visualize and gain insight into large sets of data that have a geo-coded component. It can produce 3D visualizations by plotting up to a million data points in the form of column, heat, and bubble maps on top of a Bing map. If the data is time-stamped, it can also produce interactive views that display how the data changes over space and time.

What is Power BI?

Power BI is a Data Visualization, and Business Intelligence tool which helps to converts data from different data sources into interactive dashboards and BI reports. It provides interactive visualizations of the data with self-service business intelligence capabilities where the end users can create reports and dashboards by themselves, without having to depend on information technology staff or database administrators.

What are the benefits of using variables in DAX?

Here are some benefits of using variables in DAX:

  • By declaring and evaluating the variable, a variable can be reused multiple times in the DAX expression so that we can avoid additional queries of the source database.
  • Variables can make DAX expressions more logical to interpret.
  • Variables are only used to their measure or query; they cannot be shared among measures, queries, or cannot be defined at the model level.

What are the content packs in Power BI?

Content packs for services are pre-built solutions for popular services as part of the Power BI experience.

The subscriber to a supported service can connect to their account quickly from Power BI. You can see their data through live dashboards and interactive reports which have pre-built for them.

Microsoft released content packs for popular services such as Adobe Analytics, Salesforce.com, Marketo, CircuitID, Azure Mobile Engagement, comScore Digital Analytix, SQL Sentry, Quickbooks Online, and tyGraph.

What is Power Pivot?

Power Pivot is an add-in for Microsoft Excel 2010 which enables to import millions of rows of data from multiple data sources into a single Excel workbook.

It allows to create relationships between heterogeneous data, creates calculated columns and measures using formulas, builds PivotTables, and PivotCharts. Then you can analyze the data so that you can make timely business decisions without requiring IT assistance.

Is Power BI available On-Premises?

No, Power BI is not available as a private and internal cloud service. But, with Power BI and Power BI Desktop, you can connect to your own on-premises data sources securely. With the On-premises Data Gateway, you can connect live to your on-premises SQL Server Analysis Services and other data sources. Also, You can schedule refresh with a centralized gateway. If a gateway is not available, then you can refresh data from on-premises data sources using the Power BI Gateway – Personal.