BigData / Tableau Interview Questions
What are Sets in Tableau?
A set is a custom, reusable field that defines a subset of data based on a condition or a manually chosen list of members — effectively a saved "in/out" grouping you can drop onto a view.
- Fixed sets are built from a manually selected list of specific members (e.g. these 5 named customers).
- Computed (dynamic) sets are built from a condition or a Top-N rule (e.g. "Top 10 Customers by Sales"), and automatically update as the underlying data changes.
- Sets can be dragged onto Color to highlight members vs non-members, used in a filter, or combined with other sets (union/intersection) to build more complex logic.
Right-click [Customer Name] -> Create -> Set -> Top tab -> Top 10 by SUM(Sales) -> produces a dynamic "Top 10 Customers" set
Because computed sets are rule-based rather than a fixed list, they're especially useful for things like "always show me this quarter's top performers," where the actual members should shift automatically as new data comes in.
What is the key advantage of a computed (dynamic) set over a fixed set?
What can two sets be combined with to build more complex logic?
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