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TEKsystems Data Visualisation Specialist Interview Questions

The questions to prepare for a TEKsystems Data Visualisation Specialist interview. Questions from real interview reports rank first. Updated daily.

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1
daxStart here. 2 questions · ~16 min
DAX Time IntelligenceMedium

Tests ability to build correct time-based measures using DAX time intelligence.

daxTEKsystems
DAX vs M PerformanceMedium

Evaluates tradeoffs between DAX and M for performance and modeling decisions in BI.

daxperformanceTEKsystems

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2
data relationships1 question · ~8 min
Understanding Cardinality and FiltersMedium

Assesses understanding of cardinality and how it impacts filter behavior in BI dashboards.

data relationshipsTEKsystems
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Optimize a Slow SQL QueryHard
Practice
Practice drill

Rewrite a slow PostgreSQL loan payment query to reduce scanned rows while preserving the required aggregated results.

database optimizationJoinsData WranglingAmeripriseEEltro Cyberchrome PrivateEnergyHub
Use Window FunctionsMedium
Practice
Practice drill

Demonstrate window functions by ranking active employees by salary within each department.

Window FunctionsData ManipulationRankingJohnson & JohnsonCRIFRegions
Second Highest Salary at NovaTechEasy
Practice
Recently asked
Practice drill

Find the second highest distinct employee salary from a single table, returning NULL if it does not exist.

SubqueriesRankingAggregationsBest BuyAmtex SystemsC3 AI
The finish line: interview-readyComplete all 3 questions plus 3 hands-on drills to finish this plan.