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Top Tableau Interview Questions and Answers For 2019

Updated Dec 18, 2018

What is Tableau software?                            

A business intelligence software of high repute, Tableau allows users to connect to specific data, visualize and generate interactive and create shareable dashboards.

What is data blending in Tableau?

In Tableau, data from different sources can be merged on a singular worksheet. The software allows data blending on the grounds of common dimensions.

What is KPI In Tableau?

A Key Performance Indicator in Tableau is one of the common-most things that is displayed by users on the dashboard. KPIs are used for the act of comparing historical trends and current values against pre-defined target values.

What is data visualization in Tableau?

Data visualization describes all efforts made for helping users assess the importance of data by depicting the same in a visual manner. It is specifically useful for trends, patterns and correlations that are capable of going undetected in relation to textual data. A data visualization software helps in exposing important data and makes the same recognizable for easy usage.

What are the parameters in Tableau?

Parameters are defined as dynamic values that are created for replacing constants during calculations.

What is Tableau reporting tool?

Tableau features server, desktop and hosted software tools that help users connect with, explore, visualize and report data. The data reporting tool in Tableau aids the delivery of reports in various formats such as images, PDFs, workbooks, etc. that can be opened by the Tableau Reader. Native connectors enable users to query cloud databases, relational databases, flat files, spreadsheets, etc. to generate views and ‘real-time’ reports in effective ways.

Tableau Interview Questions

What is table calculation in Tableau?

Tableau calculations are inbuilt calculations that are generally used for computing percentage changes.

What is LOD in Tableau?

Level of Detail or LOD is a syntactical expression responsible for supporting aggregation at dimensional and view levels. It allows the attachment of one/more dimensions to specific aggregate expressions.

What do you mean by the What-if the analysis in Tableau?

The What-If Analysis in Tableau helps the creation of a proposed hypothetical scenario for the purpose of getting and analyzing the results thrown back by differing parameters. The parameters are in the nature of dynamic values that analyze and interact with a given set of data after replacing constant values for the sake of calculations. For instance, it is possible to generate a calculated field that throws back true value in case sales figures top $500,000; else a false value is returned.

How many types of filters are there in Tableau?

There are three types of filters in Tableau – normal filters, context filters and custom filters.

What is context filter in Tableau?

The filter condition is the first thing to be applied to the data source. Only after that can other filters be applied to resulting records.

What is a quick filter in Tableau?

A quick filter is a simple filter that’s exposed or shown in a worksheet or view. An easy method of creating this filter is by linking the measure or dimension to the filters shelf. Thereafter, the ‘show quick filter’ option can be accessed from the drop-down menu linked to that specific dimension or measure.

What is cascading filter in Tableau?

A cascading (or hierarchical) filter is a type of filter in Tableau which, upon selection of the first filter, makes the next one limited to the newly relevant values only.

What are sets in Tableau?

A set is designed in Tableau to group up dimensions. After a set is created, it can be built on a measure; however, it only groups up the existing dimensions rather than creating any new ones.

What is discrete and continuous in Tableau?

There are two types of data-role dimensions in Tableau – discrete and continuous. The discrete values are depicted as blue icons within the data window and as blue pills on shelves. The continuous data roles are useful for measuring continuous data; they are capable of taking on any value within infinite or finite intervals.

What is Tableau public?

Tableau Public refers to a free service used for publishing interactive data visualizations online. The visualizations or ‘vizzes’ published to Tableau Public are designed to be embedded into blogs and web pages. These visualizations are shareable via email or social media and can be downloaded by other users.

How to use Tableau public?

The following steps will help you save a workbook to Tableau Public:

1. Open the specific workbook Tableau Desktop.

2. Select the path Server > Tableau Public > Save to Tableau Public.

The above option is available only in case you have generated a visualization with at least one field.

3. Sign into Tableau Public account by using your credentials.

4. Click on Save to store the workbook after giving it a name of your choice.

What is the maximum no of tables we can join in Tableau?

A maximum of 32 tables can be combined in Tableau.

What are dual axes in Tableau?

Dual axes refer to two independent axes that allow for the comparison of multiple measures. They are found layering each other. The dual axes are very handy in comparing two measures with different scales.

What is the hierarchy in Tableau?

With Tableau, hierarchies are created for the purposed of keeping user data neat and organized. They help in organizing fields (as similar categories) to enable easy tracking of relevant data. Additionally, they help in sequencing certain orders in survey data.

What is a global filter in Tableau?

A global filter is useful for sharing the same filter, in context to the same data source, across multiple/all worksheets present in a workbook. It can be applied to all worksheets utilizing the same data or to selected worksheets only.