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Prep plan
Updated weekly · Last refresh Oct 17

Quora Machine Learning Engineer Interview Questions

The questions to prepare for a Quora Machine Learning Engineer interview. Questions from real interview reports rank first. Updated daily.

50questions
~7htotal time
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1
System DesignStart here. 11 questions · ~90 min
Design Two-Tower Candidate RetrievalHard

Design a two-tower candidate retrieval system for a large personalized feed with 600M items and tight latency budgets.

Feature StoreRetrievalTwo-Tower ModelsQuora
Choose Online vs Batch ServingHard

Choose an architecture for model inference, comparing online and batch serving for a production ML system.

InfrastructureTrade-offsModel ServingQuora
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2
Machine Learning11 questions · ~90 min
Motivation for Machine LearningEasy

Explain your personal motivation for machine learning, connecting genuine interests to practical engineering work and continued learning.

model selectionFeature EngineeringDeep LearningQuora
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3
Pipelines3 questions · ~24 min
Complex ETL Pipeline ArchitectureHard

Explain the architecture of a complex ETL pipeline built from scratch, including orchestration, data quality, idempotency, and backfill strategy.

InfrastructureETLData ModelingQuora
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4
Model Evaluation8 questions · ~65 min
Explain Precision Recall TradeoffEasy

Explain precision versus recall in plain language and how the tradeoff affects product decisions.

PrecisionThreshold TuningRecallQuora
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5
Coding9 questions · ~73 min
Data Structures and OOPMedium

Evaluates how you apply core data structures and object-oriented design in implementation tasks.

Data StructuresoopQuora
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6
Statistics & Probability3 questions · ~24 min
Interpret Confidence IntervalsMedium

Tests your statistical reasoning for interpreting uncertainty in online experiment results.

Confidence IntervalsExperimentationA/B TestingQuora
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7
More topics5 questions · ~41 min
Text-Based Question RecommenderMedium

Evaluates your modeling approach for text-based retrieval or ranking in Quora's question recommendation.

Language ModelsText ClassificationWord EmbeddingsQuora
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The finish line: interview-readyComplete all 50 questions to finish this plan.