Top 20 Tableau Interview Question and answers




Tableau software is a basic requirement for any business to gain insight into the development of the company. It allows any non-technical user to easily create or develop the customized dashboards that facilitate insight into a broad spectrum of information. It is a must know interactive business intelligence tool in the field of data visualization. Therefore, the candidates who seek the scope in data visualization can get themselves acknowledged as Tableau, which can help them reach their goals. Below are some Tableau Interview questions which can help the candidates crack the interview and achieve a job.

 Here is the list of most frequently asked Tableau Interview Questions and Answers in technical interviews. These questions and answers are suitable for both fresher’s and experienced professionals at any level at tableau online training 

Frequently Asked Tableau Interview Questions and Answers

What is the 5 main product offered by Tableau company?
Tableau offers 5 main products: Tableau Desktop, Tableau Server, Tableau on-line, Tableau reader and Tableau Public.

What are the Filters? what are number sorts of filters therein Tableau?
A filter is nothing, however, it’s restricted to redundant, it’s showing actual knowledge. Primarily filters are three sorts.
1.            Fast filter
2.            Context filter
3.            Datasource filter

What do you mean by addressing and partitioning?
When you add a table the calculation, you must use all dimensions in the level of detail either for partitioning (scoping) or for addressing (direction):
The dimensions that define how to group the calculation, that is, define the scope of data it is performed on, are called partitioning fields. The table calculation is performed separately within each partition.
The remaining dimensions, upon which the table calculation is performed, are called addressing fields, and determine the direction of the calculation.
2. What is the difference between sets and groups?
Group- 1)group is category purpose
 2) calculation field not possible in a group
Sets- 1)sets is a grouping purpose based on some condition.
 2) calculation field possible in sets.
Can you get values from two different sources as a single input into parameter?
Tableau currently not support the multi-valued parameters… “Case Study: The “dynamic parameter with a blend” technique can be used to highlight a single value, but not multiple values because of the way it works. As Tableau parameters are not dynamic, we cannot “filter” the list of values at runtime.”
How many ways we use parameters in Tableau?
We can use parameters with filters, calculated fields, actions, measure-swap, changing views, and auto updates.
Can we create sets using measures
No
 What is the difference between Data blending and join?
Joining is a SQL term that refers to combining two data sources into a single data source.  Blending is a Tableau term that refers to combining two data sources into a single chart.  The main difference between them is that a join is done once at the data source and used for every chart, while a blend is done individually for each chart.

What are the different filters in Tableau and how are they different from each other?
In Tableau, filters are used to restrict the data from the database.
The different filters in Tableau are: Quick, Context and Normal/Traditional filter are:
Normal The filter is used to restricting the data from database based on selected dimension or measure. A Traditional Filter can be created by simply dragging a field onto the ‘Filters’ shelf.
Quick filter is used to view the filtering options and filter each worksheet on a dashboard while changing the values dynamically (within the range defined) during the run time.

Context Filter is used to filtering the data that is transferred to each individual worksheet. When a worksheet queries the data source, it creates a temporary, flat table that is used to compute the chart. This temporary table includes all values that are not filtered out by either the Custom SQL or the Context Filter.
How to do Performance Testing in Tableau?
Performance testing is again an important part of implementing tableau. This can be done by loading Testing Tableau Server with Tabolt, which is a “Point and Run” load generator created to perform QA. While TabJolt is not supported by tableau directly, it has to be installed using other open source products.
What is the order of execution of table calculation, LOD, reference lines?

Order of execution
LOD
Table Calculations
Reference lines
What is the use of a new Custom SQL Query in tableau?

Custom SQL Query is written after connecting to data for pulling the data in a structured view, One simple example if you have 50 columns in a table, but we need just 10 columns only. So instead of taking 50 columns, you can write a SQL query. The performance will increase.
How can we combine database and flat file data in Tableau desktop??
You can combine them by connecting data two times, one for database tables and one for the flat file. The Data->Edit Relationships. Give a join condition on the common column from DB tables to a flat file.

Define a fact table?
Fact table consists of the measurements, metrics or facts of a business process. It located at the center of a star schema or a snowflake schema surrounded by dimension tables.

How do you automate reports using Tableau software?
Steps to automate the reports: while publishing the report to Tableau server, you will find the option to schedule reports. Click on this to select the time when you want to refresh the data.

The way to rectify SQL Performance for developed Dashboards

After creation of Dashboards if we tend to get drawback from SQL aspect which means Custom SQL ….How to Rectify the SQL performance from custom SQL.

 Suppose my license expires these days, will users ready to read the dashboards or book that I revealed in server earlier.

If your server license expires these days, your username on the server can have the role ‘unlicensed’ which implies you can’t access, however, others will. the positioning Admin will ‘Change Ownership’ to a different person, thus extracts if enabled don’t fail.
Make a case for the mixing of Tableau with R?
R could be a common ASCII text file setting for applied mathematics analysis. Tableau Desktop will currently connect with R through calculated fields and make the most of R functions, libraries, and packages and even saved models. These calculations dynamically invoke the R engine and pass values to R via the Reserve package, and are come back to Tableau.
1.      Tableau Server may also design to attach to associate an instance of Reserve through the tabadmin utility, permitting anyone to look at a dashboard containing R practicality.
2.     Combining R with Tableau provides you the flexibility to bring deep applied mathematics analysis into a drag-and-drop visual analytics setting.

And more click here ….

How many maximum tables can you join in tableau?
  1. What is data visualization?
2.    How do you explain data visualization to a layman?
3.    Why did you choose data visualization?
4.    Why Do We Visualize Data?
5.    How do you define a dashboard?
6.    Briefly explain the process you follow in a data visualization project from start to finish?
7.    How do you choose a visual to represent data?
8.    What is a Column chart?
9.    What is the Bar chart?
10. What is a Line chart?
11. What is a Stacked Bar chart?
12. What is a Stacked Column Chart?
13. What is a Scatter Plot?
14. What is an Area Chart?
15. What is a Choropleth Map?
16. What is a TreeMap?
17. What is a Slope Graph?
18. What is a Waterfall chart?
19. What is a Heat Map?
20. What is a Bullet graph?
21. What is a Gantt Chart?
22. What is a Histogram chart?

  Conclusion

We have provided various questions related to Tableau concept, but still, we may lack in some areas, which we have not listed in this blog. But we suggest you must go through another section related to Tableau and be confident in your interview at Tableau training hope all these questions will help you in preparing well for your Tableau interviews ahead. Also, if you want to ask any query regarding Tableau Interview Questions feel free to ask in the comment section.

 


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