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Power BI became very popular because it is a kind of self-service business intelligence cloud service. Power BI is not only free of cost but also a highly rated and in-demand tool. Power BI is the best tool available in the market and also one of our choice recipients' editors. Many industries like retail, professional services, manufacturing, telecommunication, and many others are using Power BI. Here we provide the most frequently asked questions and answers for beginners, intermediates, and advanced to thoroughly prepare you for the interview. We assure you that there is no need for any extra preparation after reading this Power BI interview questions and answers.
Ans: It is a data visualization tool and business intelligence that helps us in data conversion from various data sources such as BI reports and interactive dashboards. Power BI offers various services and connectors of Software.
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Ans: The given below are some important uses of Power BI.
Ans: The following are some essential components of Power BI
Ans: Dax is an expression language of formula that may utilize various visualizations such as Power BI. It is also named functional language, which keeps the complete code inside a function.
Ans: The given below are data types of Dax.
Related Article: DAX In Power BI
Ans: The following are some essential applications, which use Power BI.
Ans: Along with advantages, there are some drawbacks; the given below are essential drawbacks of Power BI.
Ans: The following are three essential tools of Power BI.
Ans: The given below are some essential components of the Power BI toolkit.
Ans: The given below are some essential data sources that are available on the desktop of Power BI.
Ans: The desktop of Power BI permits us to group the information as mini chunks, and we can utilize Ctrl+ to choose various visual elements that help us in a grouping. Give right-click for those elements that appear in the windows of groups.
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Ans: We can resize a responsive slicer into various sizes and shapes simply on the page of the report. The data included in it is rescheduled according to our requirements. When visuals became very small in size to use, the icon displays visuals' capability in its place. This process also saves a lot of space on the page of the report.
Ans: M language is a kind of programming language, which is very helpful in Power query; it is sensitive and functional. This language is similar to all other programming languages, and it is easy to utilize.
Ans: Power maps may expose the visualizations, and those visualizations are geographical. This is why location data requirements are like state, city, country, latitude, longitude, etc.
Ans: The given below are some essential features of Power BI dashboards.
Ans: The given below are the steps for the data story gallery in Power BI communities.
Ans: It is a kind of in-memory component that provides high storage for compressed data; it helps us in data model building, formulas designing, relationship, and column calculations from various resources. And the filters of this Power pivot are applicable in the given levels.
Ans: The Power BI dynamic filtering has happened through the given steps.
Ans: We are required to follow the steps given below.
Ans; With variables of DAX, we can have various advantages; the given below are some of them.
Ans: They help to gain control of visuals that need to be exposed; it also permits us to unit the pages of; multiple visuals in the group and utilizes them in bookmarking.
Ans: The Power BIs latest version includes many robust features, and it is popularly known as the Power BI desktop. It looks like an all one solution for various tools like pivot view, power pivot, and power query. It provides various add-ins for excel, which made visualizations much better.
Ans: We can use Power BI without cost, but we need to take the pro subscriptions account when we utilize the complete power bi features. By using this account of subscription, we can experience an enhanced version with various features. It also contains the features available in the accessible version of Power BI.
Ans: Generally, we can store two essential kinds of data as given below.
Fact tables: The fact table is a kind of central table, a schema for the data warehouse. Fact tables store quantitative information, and it can normalize it in many cases.
Dimensional tables: dimensional table is a table from a star schema used for attributes storage and dimensions. These tables explain objects, which are stored in a table of facts.
Ans: Using the Power BI Designer, the users can design intuitive reports and dashboards simply with high speed. It is also helpful for users in changing the visual data views at their fingertips, and it develops analytics and decision making.
Ans: The Power BI contains two methods of gateways, the given below are the two methods of gateways.
Ans: The given below are the steps for SSRS integration with Power BI.
Ans: It is a kind of design strategy that is helpful for the visual arrangement of over shapes. We may explain it as the method of implementation that can be implacable when reports have various elements.
Ans: The main aim behind this power turn is the analytics engine of x velocity in memory. It permits us to deal with various informative measures that store the data in the columnar database.
Ans: Self-service business intelligence is a kind of method used to deal with investigation data that empowers business clients' channels. There is no need for specific information for the breakdown and fragment.
Ans: Power BI maintains four kinds of refresh options, and the following are those four kinds of refresh options.
Ans: We have various data sources which can connect with Power BI, and they may be grouped into three types as given below.
Ans: It is a sheet of single-layer presentation of various visualization reports, the given below are the essential features of the Power BI dashboard.
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Ans: It has two ways to define Power BI desktop relationships, the given below are those two ways.
Ans: No, we can't have multiple relationships between two tables at a time. But we can maintain multiple relationships inactively but not in an inactive state because there is a possibility for only one relationship.
Ans: We may configure refreshing data automation regularly and weekly at various times. We can schedule a maximum of one refresh when we don't have Power BI. In the scheduled refresh section, we may utilize the menu choices to choose time and frequency.
Ans: We can store the data in the tables, namely fact and dimension.
Ans: We have three essential views in the power bi desktop; each of them has various purposes.
Ans: The given below are the various formats available in Power BI.
All of the above are utilized in conjunction, and we need to generate a report on our desktop. After that, we are permitted to publish and share those reports online to read them.
Ans: The given below are some essential building blocks of Power BI.
Ans: The following are the essential components of the Power BI toolkit.
Ans: It is an adequately arranged page report of documented style page, and its reports are saved like paged documents. It is the place for vertical and horizontal expansion of documents for a view of accurate data. Paginated reports are pixel-perfect along with a fixed layout, and it is the best option for report printing from PDF.
Ans: We may utilize the Power BI on our mobile devices, including mobile compatibility apps for mobile, IOS, and Windows 10 devices. We can install Power BI apps for required devices from app stores like apple AppStore, Microsoft store, and google play.
Ans: The given below are essential requirements for gateway download in our systems.
Ans: For Power BI secure connection and Azure SQL database development, we need to follow one essential prerequisite. Before this, we need to estimate the firewall settings to permit the remote connections. Without this setup, we cant connect with the Azure SQL database.
Ans: It represents the arrangement strategy of various elements in the report of Power BI. It helps us arrange the report elements properly, like tables, slicers, visualizations, etc.0
Ans: We have various ways to map the geographic data as power bi reports, and it has bing maps integration that offers the location coordination on the default map. This entire process is named geocoding, and there is no need for manual longitude and latitude coordination. We can use those map charts to map geographical data into power bi reports.
Ans: We can refresh Power BI reports after publication in the cloud through gateways when we need to refresh them. When the report is published on Power BI websites, the gateway is utilized to refresh data.
Ans: We have three essential data shaping techniques in Power BI.
Ans: It is a kind of editor in Power Query Editor, which helps M-code view in any query. Usually, this advanced editor helps in query syntax checking, which can run in the editor. We may access this advanced editor from the tab of view in Power Query editor, and it can work with the advanced editor window for step-by-step code analysis.
Ans: The given below are the essential advantages of the Power BI gateway.
Ans: It is a kind of DAX formula that produces a column for the data table. Every value of this column is calculated while the system is computing the code. Its values are the evaluated results and the formula of calculated DAX. the calculated column value is not compressed in memory with other data values.
Ans: The conversion process of code in power query edition as SQL; is required for code execution through database sources. It is done for limited resources machines of clients and used in the optimization process.
Ans: Business intelligence (BI) is a collection of technologies for analyzing data. This data analysis provides deeper data analytics to the organization's managers and executives, allowing them to improve their decisions in the organization's development.
Ans: In Power BI, data is often contained in Fact and Dimension tables. The Fact Table is the central table in a data warehouse's star schema, and it holds quantitative data for analysis. A dimension table is a table in the star schema that stores the attributes and dimensions of the data in a fact table.
Ans: Power BI will connect to the following sources:
Ans: The distinctions between Power BI and Tableau are as follows:
Related Article: Tableau Vs Power BI
Ans: Working with Managed Enterprise BI uncovered plenty of issues, triggering the development of self-service BI. The below are some of the challenges that Self-service BI solved as compared to controlled Enterprise BI.
Self-self BI is capable of handling data streams from a wide range of sources. The data is easily digestible, and useful insights can be extracted from it. It does not need to rely on third-party vendors to conduct data analysis. Hence, time is saved and the budget problem is avoided. Dashboards support users by generating reports without the need for complex programming skills.
Ans: Query collapsing is the method of converting the steps in the power query editor to SQL and running them in the source editor.
Ans: No, more than one dynamic connection between two tables is not feasible.
Ans: Yes, Power BI users can be categorized. The classification is as follows:
The above stated are four types of users of Power BI according to their usage.
Ans: Yes, gateways may be used to refresh data that has been published on the cloud. For sharepoint, the Data Management Gateway is used, and for powerbi.com, the Power BI Personal Gateway is used.
Ans: The DAX function has the following syntax:
ProjectSales2019 = SUM (Sales [TotalSales2018]) *1.08
Ans: The Power BI dashboard can be pinned with some SSRS items. The SSRS report will open when you press the tile on the dashboard. A subscription is then generated to refresh the tile. Power BI reports will soon be able to be published to the SSRS portal.
Ans: Power BI Desktop is free to use (open-source) desktop application designed by Microsoft. It allows users to design, create quickly, transfer, visualize, and publish reports to the cloud. Power BI Desktop will enable users to build and present different reports through interactive visualizations. It also allows users to share published reports with others or colleagues.
Ans: Filters are the logical conditions that are useful to filter the required data from the rows and columns. Below are the different types of Power Bi Filters:-
Ans: Power BI allows you to build your own visualizations using the custom visualizations library. You can also add these visualizations to the reports and dashboards. Before you post the visualizations, these are properly checked, tested, and then saved. Moreover, custom visuals and reports help decision-makers to find the issues and make quick decisions.
Ans: Power BI allows users to build and use custom visual files when the pre-built visualizations don't fit best for the business needs. These files are usually made by developers who develop custom visual codes and package the same to custom visualization files.
Ans: In Power BI, Get Data is an icon that connects to various data sources and imports data from them. It is helpful for data analysis and visualization purposes. This data can be in any format like Text/CSV, Excel, XML, JSON, PDF, etc.
Ans: The following three are the different connectivity modes used in Power BI.:-
Import - It is also called SQL Server Import, a standard connectivity mode. It is frequently useful in Power BI. Import helps with faster performance and speedy delivery and allows users to utilize the full potential of Power BI Desktop.
DirectQuery - It is another connectivity mode available in Power BI and is useful when we connect to a specific data source. Also, it helps in importing data along with queries to recover it from an existing data source. Further, we can use it to avoid or stop data refreshing, which consumes much time.
Live Connection - This connectivity mode is somewhat similar to the DirectQuery method but doesn't store the data in the Power BI Model. Three data sources support the Live Connection connectivity mode: SQL Server Analysis Service, Power BI Service, and Azure Analysis (Azure Tabular) Services.
Ans: Power BI's row-level security (RLS) restricts users' data view and access. Here, filters help to limit the data access for the users. Also, it helps simplify the security design with the user application.
Ans: In Power BI, bi-directional cross-filtering is supported by Power BI Desktop, which enables data modelers to apply filters on the table relationships. It is bi-directional because it filters connections in both directions. Moreover, it makes the data modelers' job much easier, where they can solve complex problems without using DAX formulas.
Ans: Three basic DAX concepts in Power BI are essential to know. They are Syntax, Functions, and Context.
Syntax
It is helpful to write the formula or a code. It consists of various functions such as SUM, MAX, MIN, AVG, etc. If the Syntax is written wrong, you'll get an error message in return.
Functions
The functions in DAX are similar to Excel functions or arguments, which are used as a formula. These functions use certain values in a specific order to perform calculations. Further, there are various categories: date and time, logical, mathematical data, statistical data, text, and others.
Context
The contexts row and filter are the two different kinds of contexts in DAX. When a formula's Function applies a filter to locate a row in the table, row context is applied. Filter context is employed when one or many filters are used to obtain a value.
Ans: The following are the frequently used tasks within the Query Editor:-
Ans: The following three edit interactions available in Power BI Desktop are:
Filter: This edit interaction filters a visual tile-based entirely on the filter option of some other visual tile.
Highlight: The connected components on the visual tile are highlighted by this edit interaction in Power BI Desktop, while the unrelated elements are greyed out.
None: It discards the filter selection made in another visual tile.
Ans: Power BI Designer is a powerful tool in Power BI that enables users to build attractive reports and dashboards and upload them to the website, Powerbi.com. Moreover, Power Bi Designer includes Power Query, Power Pivot, etc.
Ans: The term KPI refers to a Key Performance Indicator that helps measure work progress. They present the values of how effectively we are reaching our targets. Also, they can use it to compare the earlier performance and examine the growth.
Ans: In Data Editing, we can reshape or modify our data.
Ans: In Dax, the CALCULATE function computes the total of a column. You can use filters to change/alter it.
Ans: Power BI Dashboard is where each separate chart or report produced is presented on a single page.
Ans: The following are the various Visualization types available in Power BI:-
Ans: The data might be in Excel format, or it can be presented outside. To competently prepare the data, you must ensure that it is all within the form of an Excel table, with each row indicating a distinctive record. Further, your headings of rows or columns must contain text rather than actual (real) data. It helps Power Map comprehend it accurately when plotting the geographical (correlates) coordinates. When designing a tour within the "Power Map Tour Editor" window, using relevant labels gives you access to value and other category fields.
Moreover, you can load data from the outside source by following these steps:
Ans: The FILTER function in Power BI returns a table consisting of a filter condition for each source table row. Further, this Function is hardly used in isolation; instead, it is used as a parameter to other power bi DAX functions like CALCULATE.
Because FILTER is an iterator, it might negatively influence performance when working with large data tables.
Ans: The following are the various Power Queries data destinations-
Ans: A gauge chart is helpful when comparing two separate metrics where the Target and Actual values conclude.
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