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When you want to first apply a filter and THEN show the Top N or Bottom N elements, which of the following filters would you use?

When you want to first apply a filter and THEN show the Top N or Bottom N elements, which of the following filters would you use?
A . Data source Filter
B . Extract Filter
C . Context Filter
D . None of the these

Answer: C

Explanation:

By default, all filters that you set in Tableau are computed independently. That is, each filter accesses all rows in your data source without regard to other filters. However, you can set one or more categorical filters as context filters for the view. You can think of a context filter as being an independent filter. Any other filters that you set are defined as dependent filters because they process only the data that passes through the context filter. You may create a context filter to:

1) Improve performance C If you set a lot of filters or have a large data source, the queries can be slow. You can set one or more context filters to improve performance.

2) Create a dependent numerical or top N filter C You can set a context filter to include only the data of interest, and then set a numerical or a top N filter.

Reference: https://help.tableau.com/current/pro/desktop/en-us/filtering_context.htm

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