Exam TCC-C01 Topic 2 Question 7 Discussion

Actual exam question for Tableau's TCC-C01 exam
Question #: 7
Topic #: 2

A consultant wants to improve the performance of reports by moving calculations to the data layer and materializing them in the extract.
Which calculation should the consultant use?

A. ZN([Sales])*(1 - ZN([Discount])) B. CASE [Sector Parameter]
WHEN 1 THEN "green"
WHEN 2 THEN "yellow" C. SUM([Profit])/SUM([Sales]) D. POWER(ZN(SUM([Sales]))/
LOOKUP(ZN(SUM([Sales])), FIRST()),ZN(1/(INDEX()-1)))
- 1
END

Suggested Answer: C Vote an answer

To improve performance by moving calculations to the data layer and materializing them in the extract, the consultant should choose calculations that benefit from pre-computation and significantly reduce the load during query time:
* Aggregation-Level Calculation: The formula SUM([Profit])/SUM([Sales]) calculates a ratio at an aggregate level, which is ideal for pre-computation. Materializing this calculation in the extract means that the complex division operation is done once and stored, rather than being recalculated every time the report is accessed.
* Performance Improvement: By pre-computing this aggregate ratio, Tableau can utilize the pre-calculated fields directly in visualizations, which speeds up report loading and interaction times as the heavy lifting of data processing is done during the data preparation stage.
References:
* Materialization in Extracts: This concept involves pre-calculating and storing complex aggregations or calculations within the Tableau data extract itself, improving performance by reducing the computational load during visualization rendering.

by Dwight at Dec 25, 2024, 09:02 PM

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Comments

amenibouj

2025-01-28 23:35:39

Selected Answer: C

C. SUM([Profit])/SUM([Sales])

upvoted 1 times

...

HANANE

2025-01-06 13:29:06

i believe A is the Ok one

upvoted 1 times

...

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