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Zalando Applied Scientist Interview Questions

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

44questions
~6htotal time
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1
Machine LearningStart here. 12 questions · ~97 min
Bagging vs Boosting ExplainedMedium

Explain how bagging and boosting differ, and identify a representative algorithm for each ensemble method.

Ensemble Methodsmodel trainingSupervised LearningZZalando
Cost Functions in MLMedium

Evaluates your understanding of objective functions and how they drive training.

ZZalando
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2
System Design12 questions · ~97 min
Real-Time Logistics With Inventory FluctuationsHard

Evaluates system and modeling approaches for real-time operational decisioning.

real-time dataoptimizationZZalando
Daily Retraining Pipeline ArchitectureHard

Tests end-to-end pipeline design for frequent retraining and operational reliability.

data pipelinearchitectureZZalando
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3
Behavioral & Leadership16 questions · ~129 min
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4
More topics4 questions · ~32 min
Probability, Bayes Theorem, and Optimization Case StudyHard

Assesses applied probability reasoning and numerical optimization problem-solving.

probabilityZZalando
Flood Fill Coding ProblemEasy

Tests your ability to implement a standard graph or grid traversal algorithm.

ZZalando
Expected Value With Re-rollingHard

Assesses probability reasoning and expected value calculation skills.

model qualityExpected ValueZZalando
Dictionary Implementation From ScratchMedium

Tests coding fundamentals for implementing core data structures efficiently.

Data StructuresZZalando

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