Tableau Interview Questions with Answers Part-2 ✅📊

11. What are the different types of joins in Tableau?
Tableau supports Inner Join, Left Join, Right Join, and Full Outer Join to combine tables based on matching keys from the same data source.

12. What is a calculated field in Tableau?
A calculated field lets you create a new field in your data by defining a formula or expression using existing fields, allowing custom metrics or dimensions.

13. What are the different types of calculations in Tableau?
⦁ Row-level calculations (per row)
⦁ Aggregate calculations (summaries)
⦁ Table calculations (computed on the result set, e.g., running total)
⦁ Level of Detail (LOD) calculations – fixed, include, exclude

14. Explain LOD expressions (Level of Detail).
LOD expressions allow you to compute aggregations at different granularities than the view, giving precise control on the level at which data is aggregated.

15. What are the different types of LOD expressions?
⦁ FIXED: Calculation fixed to specified dimensions
⦁ INCLUDE: Adds dimensions to the view granularity
⦁ EXCLUDE: Removes dimensions from the view granularity

16. What is a parameter in Tableau?
A parameter is a dynamic value that users can input or select to modify calculations, filters, or reference lines interactively in dashboards.

17. How do you use parameters in Tableau?
They can be used to swap measures/dimensions, control filter thresholds, change calculated field inputs, or drive conditional formatting dynamically.

18. What are sets in Tableau?
Sets are custom fields grouping data based on conditions or manual selections, used for comparative analysis or filtering.

19. How do you use sets in Tableau?
You can create dynamic sets based on conditions or logic, then use them as filters, in calculated fields, or to build comparative visuals.

20. What are groups in Tableau?
Groups combine multiple dimension members into a single bucket to simplify analysis, such as grouping several product categories together.

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