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Updated weekly · Last refresh Oct 17

DataZymes Data Analyst Interview Questions

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

20questions
~3htotal time
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1
SQL & Data ManipulationStart here. 9 questions + 3 drills · ~102 min
Handling Missing and Dirty SQL DataMedium

Explain how to profile, clean, and standardize missing or dirty data before analysis.

Data WranglingCase WhenQualityDataZymes
Multiples in PythonEasy

Tests basic programming skill for generating multiples in Python.

CodingpythonDataZymes
Answering a Business QuestionMedium

Tests end-to-end analytical thinking from requirements through insights and communication.

methodologyDataZymes
Cleaning and Trend DiscoveryMedium

Tests your approach to data cleaning, preparation, and extracting trends from messy Excel data.

data cleaningExcelDataZymes
Ensuring Visualization IntegrityMedium

Tests your controls for correctness, consistency, and trustworthiness in BI dashboards and charts.

quality assurancedata accuracyDataZymes
Use Window FunctionsMedium
Practice
Practice drill

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

Window FunctionsData ManipulationRankingJohnson & JohnsonCRIFRegions
Second Highest Without AggregatesHard
Practice
Practice drill

Find the second highest salary in each department without using aggregate functions.

SubqueriesRankingSelf-JoinsCredit GenieDevoteamCisco Restaurant + Bar
Finding Duplicate RecordsEasy
Practice
Practice drill

Find duplicate customer emails using GROUP BY and HAVING in PostgreSQL.

Group ByHavingAggregationsGuy CarpenterWestern DigitalBismart
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2
Behavioral & Leadership9 questions · ~72 min
Explaining Resume Projects and TradeoffsEasy

Tests ownership and decision-making by probing how you explain project choices, tradeoffs, and your personal impact under changing constraints.

backgroundOwnershipself introductionDataZymes
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3
More topics2 questions · ~16 min
ML and Statistics ConceptsMedium

Evaluates your understanding of core ML and statistical foundations used in analysis.

Machine LearningDataZymes
Choosing the Right MetricsMedium

Tests your ability to translate business goals into measurable KPIs for biotech and pharma analytics.

Data Analysismetric selectionDataZymes

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The finish line: interview-readyComplete all 20 questions plus 3 hands-on drills to finish this plan.