There are a large number of people who are searching for Tableau interview questions. As we know that Tableau jobs are one of the highest-paid jobs across the world. It is because of this that the demand for this job is immense. With that being said, one cannot land a job in this field without good preparation. So, what could serve helpful here? Being well prepared for the interview, without a doubt.
Now, the question is how to prepare in a way that sets you apart from the rest? Well, you need not worry about this anymore. In this article, we have a list of excellent and most frequently asked Tableau interview questions. It will help you bag a Tableau job with an attractive salary in hand.
Tableau Interview Questions
What is Tableau? (This is probably the first Tableau interview questions that you could be asked)
Tableau is one of the fastest and greatest visualizing tools used in Business Intelligence. Its main task is to simplify the raw data into an understandable format. Tableau makes the analysis of data easier and quicker than ever. Tableau aids in the visualization. It also helps in the creation of interactive and shareable dashboards.
What is data modeling?
Data modeling is the first step in the case of object-oriented programming. It is that technology that is used to examine the data objects. It is done to recognize the relationship among these data objects.
What do you understand by groups?
When the members are grouped to make superior categories, it results in “groups”.
What data types does Tableau support?
Common data types that Tableau supports are –
- Decimal numbers
- Geographical value
- Whole number
- Date and time
- Text or string
List some of the benefits of using Tableau.
Some of the prominent advantages of using Tableau are –
- Tableau offers exceptional speed
- Publishing and sharing is easier than ever
- It provides a highly interactive dashboard
- It is very easy to use
- One without much technical and programming knowledge can also work on it
- It offers a direct connection
What do you mean by a filter, and what are the various filters supported in Tableau?
Filters, just as the name suggests, restrict unnecessary data. It aids in showing the exact data. Tableau supports the following three filters – quick filter, context filter, and data source filter.
What is a context filter?
The use of context filters is to apply context to specific data subject to analysis. When one applies context, it enables the visualization of graphs and charts.
What are the limitations of using context filters?
Employing context filters is not a time-efficient process. Simply put, Tableau takes time when the user wants to place the filter in context. The following operations work backend when a filter is set as context–
- The software creates a temporary table for that context filter
- This table reloads each time
Also, the table consists of all values that aren’t filtered by the context of the custom SQL filter.
What are the different file extensions in Tableau?
Tableau supports variety of file extensions. Some of them are –
- Tableau data extract (.tde)
- Tableau bookmark (.tbm)
- Tableau preferences (.tps)
- Tableau map source(.tms)
- Tableau workbook (.twb)
- Tableau Datasource (.tds)
- Tableau packaged Datasource (.tdsx)
What is a LOD expression?
It stands for Level of Detail Expression. It is used to run complex queries involving many dimensions at the data sourcing level.
What is tableau public?
It is that feature that allows anyone to issue interactive data to the web. With this, any user can –
- Download data
- Interrelate with the data
- Generate their own data visualization
What must the user do to get the current date and time in Tableau?
Now() function in Tableau enables the user to get the current date and time.
What is meant by data blending?
Data blending is yet another critical feature that Tableau supports. Using this, it is possible to combine data from different platforms and sources. For example, Excel’s data can be blended with that of Oracle to create a new dataset.
How can you automate reports in Tableau?
The developer can follow the steps stated below to automate reports in Tableau –
- Publish the report to Tableau server.
- On doing so, there’s an option called “schedule reports”. Click here and select the time when you want to refresh the data.
How can you proceed with performance testing in Tableau?
It forms a critical aspect of implementing Tableau. To do this, load the “Testing Tableau server” with “TabJolt”. TabJolt is a “point and run” load generator. It is created to perform QA. Developers can learn that TabJolt is not supported by Tableau directly. It is because of this that it needs to be installed. The developer can use open-source products to do this.
What do you mean by a Tableau worksheet?
It is a single view sheet that contains various visualizations. A tableau worksheet consists of elements such as
- Data and analytics pane
- Show Me menu
- Legends, among others
Additionally, the Tableau worksheet also supports a blank area to create visualizations. Yet another advantage is that you can use multiple worksheets to create stories, dashboards, and workbooks.
What is an aggregation of data in Tableau?
Aggregation is the process of creating a summary of the data. The objective is to obtain a single numeric value. For example, the average marks obtained by the students are a result of aggregation.
If you have made up your mind to get a Tableau job, start preparing for the same right away. The above guide will give you a gist of how the Tableau interview questions will be in reality. Prepare in-depth all the major concepts and features, and you’re good to go!