Tableau interview questions

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 to 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.

#1 What is a Tableau data sheet?

After you interface with your information and set up the information source with Tableau, the data source associations and fields show up on the left half of the workbook in the Datasheet.

#2 Mention some file extension in Tableau?

There are many file types and extensions in Tableau.
Some of the file extensions in Tableau are:
  • Tableau Workbook (.twb).
  • Tableau Packaged Workbook (.twbx).
  • Tableau Datasource (.tds).
  • Tableau Packaged Datasource (.tdsx).
  • Tableau Data extract (.tde).
  • Tableau Bookmark (.tdm).
  • Tableau Map Source (.tms).
  • Tableau Preferences (.tps)

#3 What are interactive dashboards?

Dashboards which empower us to connect with different components like channels, parameters, activities and cut up the information to show signs of improvement experiences or answer complex questions.

#4 What is a mark card in Tableau?

The Marks card is a key component for visual examination in Tableau. As you drag fields to different properties in the Marks card, you add setting and detail to the marks in the view. You utilize the Marks card to set the mark write and to encode your information with size, color, text, shape, and detail.

#5 What is VizQL?

  • VizQL is a visual inquiry language that interprets simplified activities into data questions and after that communicates that information visually.
  • VizQL conveys dramatic gains in individuals’ capacity to see and understand information by abstracting the hidden complexities of question and analysis.
  • The result is an instinctive user encounter that gives people to answer questions as quickly as they can consider them.

#6 What is Application Server?

Application Server forms handle content perusing, server organization and permissions for the Tableau Server web and mobile interfaces.

#7 What are the Aggregation and Disaggregation?

Aggregation and Disaggregation in Tableau are the approaches to build up a scatter plot to look at and measure data values.

Aggregation Data

When you put a measure on a shelf, Tableau consequently totals the information, generally by summing it. You can easily decide the collection applied to a field because the capacity dependably appears before the field’s name when it is put on a shelf.

Disaggregating Data

Disaggregating your information enables you to see each line of the information source, which can be helpful when you are breaking down measures that you might need to utilize both freely and conditionally in the view.

#8 Explain the aggregation and disaggregation of data in Tableau?

Aggregation and disaggregation of data in Tableau are the ways to develop a scatterplot to measure and compare the data values.
Aggregation:
It is calculated the form of a set of values that return a single numeric value. A default aggregation can be set for any measure which is not user-defined.
Disaggregation:
The disaggregation of data refers to view each data source row during analyzing of data both dependently and independently.

#9 Difference between Tiled and Floating in Tableau Dashboards

Tiled items are organized in a single layer grid that modifies in a measure, which is based on the total dashboard size and the objects around it. Floating items could be layered on top of other objects and can have a permanent size and position.

Floating Layout While most questions are tiled on this dashboard, the map view and its related color legend are floating. They are layered on top of the bar graph, which utilizes a tiled layout.

#10 What is Backgrounder?

The backgrounder invigorates planned extracts, conveys notifications and manages other background assignments. The backgrounder is intended to expend as much as CPU is accessible to complete the background action as fast as could be possible.

#11 What is a Stacked Bar chart?

A stacked bar chart is a chart that utilizes bars to indicate correlations between categories of information, however with the capacity to break down and look at parts of an entirety. Each bar in the chart speaks to an entire, and fragments in the bar speak to various parts or classes of that whole.

#12 What are different site roles we can assign to a client?

Site roles are approval sets that are assigned to a client, for example, System Administrator, Publisher, or Viewer. The site roles characterize accumulations of capacities that can be conceded to clients or groups on Tableau Server.General site roles, which we can assign to a client are as follows-:

  • Server Administrator: This role has full access to all servers and functionality of the website, all content on the server, and all clients.
  • Site Administrator: By assigning this role one can manage groups, activities, projects, workbooks and information sources for the site.
  • Publisher: Publishers can sign in, communicate with published views and publish dashboards to Tableau server from the desktop.

#13 How many maximum tables can you join in tableau?

We can join a maximum of 32 tables in Tableau. Table size should also be restricted to 255 columns.

#14 What is Assume referential integrity?

In Database terms, each row in the certainty table will contain a combination roe in measurement table. Utilizing this strategy, we manufacture Primary and Foreign Keys for joining two tables. By choosing Assume Referential Integrity, you reveal to Tableau that the joined tables have referential integrity. In another word, you are confirming that the fact table will dependably have a coordinating row in the Dimension table.

#15 Explain about Actions in Tableau?

Tableau enables you to add context and intuitiveness to your information utilizing actions. There are three types of actions in Tableau: Filter, Highlight, and URL activities

  • Filter actions enable you to utilize the information in one view to filter data in another as you make guided systematic stories.
  • Highlight actions enable you to point out external resources.
  • URL actions enable you to point to external resources, for example, a site page, document, or another Tableau worksheet.
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