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Updated weekly · Last refresh Oct 17

SynergisticIT Data Scientist Interview Questions

The questions to prepare for a SynergisticIT Data Scientist interview. Questions from real interview reports rank first. Updated daily.

18questions
~3htotal time
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1
Product SenseStart here. 3 questions · ~28 min
Choose the Right Feature MetricMedium

Framework for choosing whether a new feature should be measured primarily by engagement, retention, or revenue.

Feature PrioritizationUser NeedsProduct VisionSynergisticIT
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2
A/B Testing & Experimentation3 questions · ~28 min
Pitfalls in Concurrent ExperimentsHard

Identify and mitigate interference, metric contamination, SRM, peeking, and multiple-testing risks across concurrent experiments.

experiment designGuardrail Metricsuser baseSynergisticIT
Measure Interference in Customer Change TestHard

Design an experiment when treatment spills across customers and contaminates the control group.

Network InterferenceSwitchback TestsA/B TestingSynergisticIT
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3
Statistics & Probability3 questions · ~28 min
Parametric vs Non-Parametric TestsMedium

Tests statistical test selection under skewed data conditions.

Data AnalysisSynergisticIT
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4
Behavioral & Leadership5 questions · ~47 min
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5
More topics4 questions · ~37 min
Top Users by Session DurationMedium
Practice

Calculate total completed session duration per user and return the top three users in PostgreSQL.

Joinssql queriesAggregationsSynergisticIT
Diagnose a Sudden DAU DropHard

Investigate whether an 8.2% DAU decline is driven by product breakage, logging issues, or normal seasonal patterns.

DAU/MAUDiagnosisTime SeriesSynergisticIT
L1 vs L2 RegressionMedium

Assesses understanding of regularization techniques and their impact on model behavior.

RegressionAlgorithmsSynergisticIT
Rolling Transaction SQL and RankingHard
Practice

Calculate each user's 7-day rolling transaction average and daily spend rank using PostgreSQL window functions.

Window FunctionsDate FunctionsRankingSynergisticIT

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Hands-on SQL practiceWrite and run real queries in the editor. 1 drill · ~10 min
Window Function Top N Per GroupMedium
Practice
Practice drill

Return the top two records in each group using ROW_NUMBER() with deterministic tie-breaking.

Window FunctionsData ManipulationRankingSynergisticIT
The finish line: interview-readyComplete all 18 questions plus 1 hands-on drill to finish this plan.