Tableau Interview Questions and Answers

Ques 1. What is Tableau?

Tableau is a data visualization and business intelligence tool that allows users to connect, visualize, and share data in a way that provides insights and facilitates decision-making.

Ques 2. What is a calculated field in Tableau?

A calculated field is a user-defined field that performs computations on the existing fields in the data source. It allows users to create new data based on the existing data in the dataset.

Example:

Example: Profit Margin = (Profit / Sales) * 100

Ques 3. Explain the difference between a worksheet and a dashboard in Tableau.

A worksheet is a single chart or map, while a dashboard is a collection of sheets arranged on a single canvas. Dashboards are used to combine multiple visualizations to tell a more comprehensive story.

Ques 4. Explain the concept of aggregation in Tableau.

Aggregation in Tableau refers to the process of combining data at a higher level to provide a summary. Functions like SUM, AVG, MIN, and MAX are examples of aggregations that can be applied to measures in Tableau.

Ques 5. What is the difference between a dimension and a measure in Tableau?

A dimension is a categorical field that defines the discrete data points, while a measure is a quantitative field that provides the values to be analyzed. Dimensions are typically used on the rows and columns shelf, while measures are used in the data pane for analysis.

Ques 6. What is the difference between a discrete and a continuous field in Tableau?

A discrete field contains distinct, separate values and is often categorical. A continuous field, on the other hand, represents a range of values and is typically numerical. Discrete fields are used for dimensions, and continuous fields are used for measures.

Ques 7. What is the Tableau Repository, and where is it located?

The Tableau Repository is a directory on the computer where Tableau Desktop is installed. It contains configuration files, logs, and other settings related to Tableau. The default location is 'My Tableau Repository' in the 'Documents' folder.

Ques 8. How can you create a trend line in Tableau?

To create a trend line in Tableau, right-click on a measure in the view, hover over 'Trend Lines,' and choose the appropriate type (linear, logarithmic, etc.). Trend lines help in identifying patterns and trends in data.

Ques 9. What is the purpose of a Tableau Workbook (TWB) file?

A Tableau Workbook (TWB) file is a XML-based file that contains the information necessary to connect to a data source, define calculated fields, and organize the layout of worksheets and dashboards. It does not store the data itself but rather the metadata for the workbook.

Ques 10. How can you create a parameter in Tableau?

To create a parameter in Tableau, right-click on a blank space in the Data pane, select 'Create Parameter,' and define the parameter properties. Parameters allow users to create dynamic and interactive elements in the workbook.