Tableau interview questions

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.

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Tableau interview questions

Tableau is a data visualization tool that allows the user to develop an interactive and apt visualization in the form of dashboards, worksheets for the betterment of the business.

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.

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)

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.

The parameters of Tableau can be represented only in four ways on a dashboard. The parameters do not allow any further multiple selections in a filter.

Waterfall chart viably shows the combined impact of consecutive positive and negative values. It demonstrates where a value begins, closures and how it arrives incrementally. Along these lines, we can see both the size of changes and the difference in values between consecutive data points.

As a propelled information visualization instrument, Tableau makes the information analysis simple by giving numerous analysis systems without composing any custom code. One of such features is Show Me. It is utilized to apply an expected view to the current information in the worksheet. Those perspectives can be a pie chart, a scramble plot, or a line chart.

Tableau information connectors use your current information foundation by sending dynamic SQL or MDX statements straightforwardly to the source database rather than importing all of the information. This implies if you’ve put resources into a quick, analytics optimized database like Vertica, you can pick up the advantages of that venture by associating live with your data.

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

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.

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.

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.

Hierarchy in Tableau gives drill down activity to the Tableau report. With the assistance of tiny + and – symbols, we can explore from a larger level to a settled level or lower level. When you interface with an information source, Tableau consequently separates date fields into hierarchies so you can without much of a stretch separate the viz. You can also make your particular hierarchies.

A Gantt chart is a valuable graphical device, which demonstrates tasks or activities performed against time. It is also called the visual presentation of a task where the activities are separated and shown on a chart, which makes it is straightforward and interpret.

A histogram is a plot that gives you a chance to find, and show, the basic frequency (shape) of an arrangement of continuous information. This allows the examination of the information for its hidden distribution, anomalies, sleekness, and so on.