Tableau Interview Questions and Answers Set 9

  1. 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 TabJolt, 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.

  1. Is Tableau software good for strategic acquisition?

Yes! For sure. It gives you data insight to the extent that other tools can’t. Moreover, it also helps you to plan and point the anomalies and improvise your process for betterment of your company.

  1. Can Tableau be installed on MacOS?

Yes, Tableau Desktop can be installed on both on Mac and Windows Operating System.

  1. What are groups?

A group is a combination of dimension members that make higher level categories. For example, if you are working with a view that shows average test scores by major, you may want to group certain majors together to create major categories.

  1. Mention what are different Tableau files?

Different Tableau files include:

Workbooks: Workbooks hold one or more worksheets and dashboards

Bookmarks: It contains a single worksheet and its an easy way to quickly share your work

Packaged Workbooks: It contains a workbook along with any supporting local file data and background images

Data Extraction Files: Extract files are a local copy of a subset or entire data source

Data Connection Files: It’s a small XML file with various connection information

  1. How to automate reports?

You need to publish report to tableau server, while publishing you will find one option to schedule reports. You just need to select the time when you want to refresh data.

  1. What is Assume referential integrity?

In some cases, you can improve query performance by selecting the option to Assume Referential Integrityfrom the Data menu. When you use this option, Tableau will include the joined table in the query only if it is specifically referenced by fields in the view.

  1. Explain what is the difference between blending and joining in Tableau?
  • Joining term is used when you are combining data from the same source, for example, worksheet in an Excel file or tables in Oracle database
  • While blending requires two completely defined data sources in your report.
  1. Mention whether you can create relational joins in Tableau without creating a new table?

Yes, one can create relational joins in tableau without creating a new table.

  1. Explain what is Tableau Data Extract?

A table data extract is a compressed snapshot of data stored on disk and loaded into memory as required to render a Tableau. A TDE is a columnar store and reduce the input/output required to access and aggregate the values.