Interview Questions and Answers of Tableau

Q1- Define is tableau?

In the business intelligence market, Tableau is an effective data analysis application. It converts raw information into a form that is simple to comprehend. It represents data and provides shared, interactive visualizations. Tableau does not involve technical or programming ability.

Q2- Describe Features of tableau?

  • Data Blending:Data binding is the key feature of Tableau. Whenever we aggregate linked data from many data sources that we wish to examine in a single view and display in the shape of a graphs, then use it.
  • Real-time analysis: When the Velocity is high and real-time data analysis is difficult, proper analysis allows users to swiftly interpret and evaluate dynamic data. Tableau’s engaging analytics will help businesses extract useful information from rapidly datasets.
  • Data Collaboration: Data analysis isn’t really a short – term process. Tableau was created with cooperation in mind. Team members to share data, run follow-up enquiries, and send easy-to-understand visuals to those who might find the information useful. It is vital to succeed that everyone grasp the information and can examine the implications.

Q3- What is the use of tableau?

Tableau can analyze information from any source, including on-premise data, databases, information warehouses, cloud applications, and stand-alone files. You’ll create different perspectives on our expertise and share them with other coworkers, customers, and partners. Tableau will be used to combine it with additional data. So we will maintain our prior information in a logical manner.

Q4- What is filters and how many sorts of filters in tableau?

A filter would be nothing, yet it is limited to unnecessary data and displays true expertise. There are three types of filters.

  • Fast filter.
  • Context filter.
  • Datasource filter.

Q5- How many tools are used in tableau?

Tableau has five tools:

  • Tableau Desktop
  • Tableau Public
  • Tableau Online
  • Tableau Server
  • Tableau Reader

Tableau Desktop:

It is helpful to establish the connection between Data Warehouse to a variety of different sources of files. It enables us to modify and program results. Most of the essential work done in tableau Desktop.

Tableau Public:

It ismade for cost-effective users. The term ‘public’ denotes that the workbooks developed cannot be stored locally. They should always be stored on Tableau’s cloud platform, that anybody can access and read.

Tableau Online:

Tableau online is a hosted version of Tableau Server that speeds up business plan. It allows users to quickly exchange dashboards across many platforms. It allows users and companies to exchange real-time views while also providing a safe and managed platform. No need to acquire, set up, or maintain any structure because this can grow up to any size.

Tableau Server:

It’s a business analytics program that uses a web to deliver analytics to everyone. But it is faster than conventional company software, it is just an opportunity that everyone wants. Tableau does not require coding, making it incredibly user-friendly, and it is possible to become a business analyst, scale installation, or even train completely free.

Tableau Reader:

It’s a free desktop programme that lets users open and examine Tableau Desktop-created visuals. We can filter and push it down into information, but simply can’t modify or engage with it.

Q6- Define Measures and Dimensions in tableau?

Measures:

The mathematical characteristics or measurable characteristics of the data that can be studied by a dimension table is known as measures. Measures are kept in a table with foreign keys which relate to the dimension tables in a unique way. The table enables for simultaneous file storage, allowing for a greater number of entries to be entered at once. A Sales table, for example, could have product keys, client keys, promotional keys, and goods sold, all of which correspond to a specific incident.

Dimensions:

Dimensions are meaningful parameter variables for every attribute’s multiple shapes, providing multiple qualities. Product or brand, product category, shape, colour, explanation, and other information can be found in a dimension table with the use of a license key.

Q7- Difference between .twb and .twbx extensions?

.twb .twbx
The details regarding the dashboards, spreadsheets, and tales are stored in a.twb file, which is an xml document. It’s doesn’t hold any data, therefore users must provide both the worksheet and the Tableau appropriate data package to publish the worksheet.
A.twbx file is a collection of files that have been “encoded.” It contains the data source file as well as any extra files used to create the worksheet, such as pictures.

Q8- Name the data types use in tableau?

Tableau automatically constructs variables and provides data structures. Tableau used the type of data that would be specified by the data source. Tableau can generate a data type if the information source does not do it independently. The essential data types can be found in Tableau:

  • Values for dates.
  • Values for text.
  • Values in numbers.
  • Values for date and time.
  • Boolean values.
  • Geographical significance.

Q9- What are the different types of Joins in Tableau?

There are five joins are use in tableau which are similar to SQL Join:

  • Cross Join.
  • Inner Join.
  • Left Outer Join.
  • Right Outer Join.
  • Full Outer Join.

Cross Join:

Each row from the first table is combined with every row from the second table, resulting in rows.

Inner Join:

The matched rows from of the tables which are being combined are returned via an inner join.

Left Outer Join:

The left outer join delivers matched rows from the tables being joined, as well as not-matching rows from left table, and sets NULL values inside the right table’s characteristics.

Right Outer Join:

As a result, the right outer join operation returns matching rows from the tables being merged, as well as non-matching rows from the right table, and sets NULL values in the left table’s attributes.

Full Outer Join:

To join tables together, use the full outer join. As a result, it has all of the data from both tables.

Q10- What are sets in tableau?

Sets are used in Tableau to produce subsets of data based on the user’s specific requirement. Only the dimension value is used to build sets.

Tableau distinguishes between two kinds of sets:

  1. Dynamic Sets:

    When the data stream changes, the elements or members of dynamic sets change.

  2. Fixed Sets:

    When the data stream changes, the static sets’ variables or members should not modify.

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