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Zalando Data Analyst Interview Questions

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

Choosing Visualization Tools for SQL Insights
Easy

Explain which visualization tools you use after SQL analysis and why, based on audience, speed, and dashboard needs.

ToolsData WranglingAggregations
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Self-Join Logic for Relationships
Medium

Evaluates your ability to model relationships and solve problems using SQL joins.

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Window Functions for Cleaning
Medium

Assesses your SQL skills for transforming and aggregating data with advanced functions.

Window Functionsdata cleaning
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Diagnose Sample Ratio MismatchHard

Investigate sample ratio mismatch and decide whether an experiment readout is trustworthy enough to ship.

Guardrail MetricsSample Ratio MismatchA/B Testing
ZZalando
Design Test for New Feature
Medium

Design an A/B test for a new platform feature, including success metrics, power, guardrails, and a clear ship decision.

experiment designfeature evaluationA/B Testing
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Significance vs Noise
Medium

Tests your statistical reasoning for distinguishing real effects from random variation.

Hypothesis TestingStatistical Significance
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Explaining Simpson’s Paradox
Medium

Evaluates your ability to avoid misleading conclusions from aggregated data.

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