Top Tableau Interview Questions And Answers for 2024

1.What is Tableau?

• Tableau is a business intelligence software.
• Anyone can connect to the relevant data thanks to it.
• It generates shareable, interactive dashboards through visualisation.

2.What are the different Tableau Products and what is the latest version of Tableau?

Here is the Tableau Product family:

Tableau Desktop

Anyone can use it to self-serve for business analytics and data visualisation. It converts data images into efficient queries. You can perform real-time, up-to-date data analysis using Tableau desktop by connecting directly to data from your data warehouse. Additionally, queries can be executed without creating a single line of code. Combine all of your data by merging several views into an interactive dashboard and importing it all into Tableau’s data engine from various sources.

Tableau Server

It is more akin to Tableau software for enterprises. Tableau Desktop allows you to publish dashboards, and the web-based Tableau server allows you to share them with everyone in the organisation. Via live connections, it makes use of quick databases.

Tableau Online

This hosted version of Tableau Server facilitates more rapid and straightforward business intelligence processing than previously. Tableau Desktop allows you to publish dashboards and share them with peers.

Tableau Reader

You may open and view built-in Tableau Desktop visualisations using this free desktop application. While you can drill down and filter data, you are unable to edit or carry out any other type of interaction.

Tableau Public

You can create visualisations with this free Tableau software, but you must save your workbooks or worksheets to the Tableau Server so that anybody can access them.

3.What are Measures and Dimensions?

Measures are quantifiable amounts of data or numerical metrics that can be examined using dimension tables for analysis. Measures are kept in a table with foreign keys that point specifically to the corresponding dimension tables. More records can be added to the table at once because it enables atomic-level data storage. For example, a sales table may have product keys, customer keys, promotion keys, and goods sold that are associated with a particular occasion.

Dimensions are the values of the descriptive attributes for each attribute’s numerous dimensions, which define its multiple qualities. A dimension table may have the following information: product name, product type, size, colour, description, and so on. It is referenced by a product key from the table.

4. What is the difference between .twb and .twbx extensions?

The choices and styles you’ve made in your Tableau workbook are all contained in a.twb, an XML document. It is devoid of any info.

A “zipped” archive with a.twb and any external files, like backdrop photos and extracts, is called a “.twbx”

5.In Tableau, the maximum number of tables you can join is?

In Tableau, you can combine up to 32 tables at once.

6.What are the different connections you can make with your dataset?

We have two options: we can extract data into Tableau or connect live to our data set.

• Live: Making a live connection to a data source makes use of its computational capacity and storage. New queries will be sent to the database, where they will appear in the data as updated or new.
• Extract: To be used by Tableau’s data engine, an extract creates a static snapshot of the data. The data snapshot can be incrementally added to or updated as a whole on a recurrent basis. Using the Tableau server is one method of configuring these schedules.

Tableau extract has two advantages over live connections: it can be used offline and allows you to create custom visualisations without requiring a database connection.

7.What are sets?

Custom fields called sets specify a subset of data according to certain criteria. A set may consist of clients whose sales surpass a specific threshold, for instance, or it may be based on a computed criterion. Computed sets adapt to changes in your data. As an alternative, a collection may be predicated on a particular data point in your opinion.

8.What are groups?

A group is an assembly of people from different dimensions that form higher-level categories. For instance, you might wish to build major categories by combining certain majors if you are dealing with a view that displays average test scores by major.

9.What is a hierarchical field?

In Tableau, a hierarchical field is utilised for data drilling. It entails looking at your data at a more detailed level.

10.What is Tableau Data Server?

Between Tableau users and the data, the Tableau server serves as a go-between. You can reuse calculations and field metadata, store database connections, and upload and distribute data extracts using Tableau Data Server. This makes it possible to create a safe, centrally managed, and standardised dataset by enabling you to store and distribute modifications you make to the data set, calculated fields, parameters, aliases, or definitions. Furthermore, you can use the resources on your server to perform searches on extracts without first transferring them to your local computer. Check out the online Tableau course to learn more.

11.How can you create a dashboard in Tableau?

In Tableau, take the following actions to create a dashboard:

• Connect to Data: Open Tableau and establish a connection to the data source that you wish to visualise. Spreadsheets, databases, online services, and more are just a few of the data sources that Tableau can access.
• Create Custom Worksheets: Drag and drop fields from the data pane onto the Rows and Columns shelves to create separate spreadsheets. Select several chart styles, colours, labels, and formatting choices to personalise the representation.
• Establish a New Dashboard: After creating the required worksheets, click the “New Dashboard” button in the lower left corner to access the dashboard tab.
• Add Worksheets to Dashboard: The worksheets you made in step two can be dropped and dragged onto the dashboard canvas. You can adjust them to match the arrangement and arrange them however you like.
• Include Filters and Objects: You may improve the dashboard by including text, photos, and web pages. To allow users to examine the data and encourage engagement, you may also add filters.
• Customise and Format: Arrange the dashboard such that it is aesthetically pleasing and simple to comprehend. Tableau offers a range of formatting settings related to text, colour, size, and arrangement.
• Establish Interactions on the Dashboard: Configure the dashboard to allow interactivity between various worksheets. To update one worksheet based on selections in another, for instance, you can build filter actions.
• Test and Refine: Examine the dashboard and see how it works. Make any necessary changes to make sure it satisfies your needs and offers the required insights.
• Save and Share: After the dashboard is finished, share it with others by publishing it to Tableau Server or Tableau Online or saving it in Tableau format (.twb).

These methods will help you make an engaging and eye-catching Tableau dashboard that lets people explore and learn from your data visualisation.

12.What is data blending in Tableau?

To create a single view that can be utilised for analysis, data blending in Tableau refers to the process of merging data from many sources or links. It is employed in situations where there isn’t a shared key or direct connection between the data sources. Tableau connects the primary and secondary data sources logically by identifying comparable dimensions. This enables users to deal with complex data sets and get insights from data that is difficult to combine using conventional joins. However, there might be certain restrictions on data blending, such as the potential for performance problems and data duplication. Nevertheless, it’s a strong Tableau tool that enables in-depth analysis of numerous datasets.

Conclusion You can learn more about Tableau by checking out the Tableau online training.