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Updated weekly · Last refresh Oct 17

Facebook Research Engineer Interview Questions

The questions to prepare for a Facebook Research Engineer interview. Questions from real interview reports rank first. Updated daily.

38questions
~5htotal time
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1
Model EvaluationStart here. 5 questions · ~40 min
Rigorous Preproduction Model ValidationMedium

Describe a rigorous preproduction validation plan, including offline testing, calibration, threshold selection, and error analysis.

Cross-ValidationLog LossAccuracyFacebook
Evaluate Production ReadinessMedium

How to judge whether a model is ready for production using core evaluation metrics and threshold choice.

PrecisionAccuracyRecallFacebook
Monitor Production Model PerformanceHard

Approach for monitoring a model in production and spotting drift, threshold issues, and calibration loss.

PrecisionAccuracyRecallFacebook
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2
System Design15 questions · ~121 min
Audio Filter Design for Low LatencyHard

Tests signal processing fundamentals and system-level thinking for low-latency audio pipelines.

latencysignal integritydesign trade-offsFacebook
Real-Time Stream Processing Minimal OverheadHard

Tests distributed systems and streaming architecture design for efficiency and throughput.

Stream Processinglow latencyreal-time systemsFacebook
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3
Behavioral & Leadership15 questions · ~121 min
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4
More topics3 questions · ~24 min
Deep Dive Into Your Current WorkMedium

Evaluates your ability to explain and justify current technical work in depth.

Facebook
Implement Audio Filter in Python or MatlabHard

Tests practical coding ability for signal processing and translation from theory to working code.

pythonaudio segmentsFacebook
Approach an Unclear Coding ProblemMedium

Tests problem-solving process, decomposition, and ability to make progress with limited guidance.

Problem Solvingcoding interviewAlgorithmsFacebook

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