Tableau Interview Questions and Answers for Fresher's and Experienced -2020

 Top Tableau Interview Questions in 2020

In this article, “Tableau Interview Questions and Answers”, we are going to check & explore the knowledge of Tableau. 

Tableau Real time Interview Questions and Answers:- 

In this series, we are listing most commonly asked Tableau scenario based interview questions, which are asked in an interview for Tableau developers and Tableau Programmers. this series of  tableau questions are starting from beginner to advanced level created by industry experts.

Let's start the Series of -tableau interview questions and answers.

                                          

                                  Part-1 for Beginners

Question-1  What is Tableau ?

Ans: Tableau is a powerful tool for analyzing data, but amazing insights are meant to be shared with everyone... and explored further! Tableau makes it easy to share data, no matter what your requirements are. Tableau Online is an easy-to-use, cloud based BI tool that can enable any organization to share visualizations created in Tableau Desktop with other people. Tableau Server enables the same sharing capabilities through a similar interface, but it is installed on your own network servers and managed by you.

 Question-2  What are the file size limitations with Tableau?

 Ans: In Tableau, there are no limitations with the file sizes. And moreover, there is no row   or column limit to import the data.

 Question-3  What is LOD Expression in Tableau ? 

 Ans: LOD Expression stands for Level of Detail Expression, and it is used to run the    complex queries involving many dimensions at data sourcing level. 

  Question-4. State the list of Tableau File Extensions.

  Ans: The below ones are few extensions in Tableau:

  1.     Tableau Workbook (.twb)

  2.     Tableau Data extract (.tde)

  3.     Tableau Datasource (.tds)

  4.     Tableau Packaged Datasource (.tdsx)

  5.     Tableau Bookmark (.tbm)

  6.     Tableau Map Source (.tms)

  7.     Tableau Packaged Workbook (.twbx) – zip file containing .twb and external files.

  8.     Tableau Preferences (.tps)

Question-5. What is the latest version of Tableau Desktop?

Ans: Tableau Desktop latest version is 2020.1.

Question-6. What is the difference between heat map and tree map in Tableau?

Ans: 

TreeMap	Heat Map
It represents the data hierarchically and shows them as a set of nested rectangles.	It represents the data graphically which uses multiple colours to represent different values.
It is used for comparing the categories with colours, size, and it can also be used for illustrating the hierarchical data and part to whole relationships.	It is used for comparing the categories based on colour and size. And also it is great in spotting the patterns based on the density of the information.
Colours and size of rectangles are respective to the values of the data points	When their values are higher or density of records, the data will represent in dark colour.

Question-7. List the different data types in Tableau?

Ans:  Tableau supports below data types.

Data Type	Meaning	Examples
String	Character Sequence. Enclosed in ''.	Tableau', 'World'
Number (Whole)	Integers	9
Number (decimal)	Floating values.	123.45
Boolean	They are logical values.	TRUE, FALSE
Date	Date	"02/01/2015"
Date & Time	Date and Time	01 January 2019 05:55:00 PM
Geographic Values	Geographical Values	India, Italy, Canada

Question-8 Give an overview for fact and dimension of the table?

Ans: Facts are numeric measures of data. They are stored in fact tables. Fact tables store that type of data which will be analyzed by dimension tables. Fact tables have foreign keys associating with dimension tables.

Dimensions are descriptive attributes of data. Those will be stored in dimensions table. For example, customer’s information like name, number,  and email will be stored in dimension table.

Question-9 . What is tableau dashboard?

Ans: Tableau dashboard is a consolidated display of many worksheets and related information in a single place. It is used to compare and monitor a variety of data simultaneously. The different data views are displayed all at once. Dashboards are shown as tabs at the bottom of the workbook and they usually get updated with the most recent data from the data source. While creating a dashboard, you can add views from any worksheet in the workbook along with many supporting objects such as text areas, web pages, and images.