- What is default Data Blending Join?
Data blending is the ability to bring data from multiple data sources into one Tableau view, without the need for any special coding. A default blend is equivalent to a left outer join. However, by switching which data source is primary, or by filtering nulls, it is possible to emulate left, right and inner joins.
- What do you understand by blended axis?
In Tableau, measures can share a single axis so that all the marks are shown in a single pane. Instead of adding rows and columns to the view, when you blend measures there is a single row or column and all of the values for each measure is shown along one continuous axis. We can blend multiple measures by simply dragging one measure or axis and dropping it onto an existing axis.
- What is the story in Tableau?
A story is a sheet that contains a sequence of worksheets or dashboards that work together to convey information. You can create stories to show how facts are connected, provide context, demonstrate how decisions relate to outcomes, or simply make a compelling case. Each individual sheet in a story is called a story point.
- What is Tableau Public?
Tableau Public is a free service that lets anyone publish interactive data to the web. Once on the web, anyone can interact with the data, download it, or create their own visualizations of it. No programming skills are required. Be sure to look at the gallery to see some of the things people have been doing with it.
- What is data modeling?
Data modelling is the analysis of data objects that are used in a business or other context and the identification of the relationships among these data objects. Data modelling is a first step in doing object-oriented programming
- What is your daily work process in tableau?
I think we all work on different projects using Tableau, so the work begins from understanding the requirement getting the required data, story boarding then creating visualizations in tableau and then presenting it to the client for review.
- What is parameter in Tableau? And how it works?
Parameters are dynamic values that can replace constant values in calculations and can serve as filters
- How does Tableau perform with huge datasets?
Tableau Performance is based on Data source performance. If data source takes more time to execute a query then Tableau must wait up to that time.
- Explain the integration of Tableau with R?
R is a popular open-source environment for statistical analysis. Tableau Desktop can now connect to R through calculated fields and take advantage of R functions, libraries, and packages and even saved models. These calculations dynamically invoke the R engine and pass values to R via the Rserve package, and are returned back to Tableau.
Tableau Server can also be configured to connect to an instance of Rserve through the tabadmin utility, allowing anyone to view a dashboard containing R functionality.
Combining R with Tableau gives you the ability to bring deep statistical analysis into a drag-and-drop visual analytics.
- Define the names for parameters, filters etc…
Parameters are dynamic values that can replace constant values in calculations and can serve as filters.Filters are used to restrict the data based on the condition u have mentioned in the filters shelf.