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Updated weekly · Last refresh Aug 30

Tencent Research Scientist Interview Questions

The questions to prepare for a Tencent Research Scientist interview. Questions from real interview reports rank first. Updated weekly.

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1
Machine LearningStart here. 5 questions · ~41 min
LSTM Gates and GradientsHard

Tests deep understanding of recurrent training stability and the role of LSTM gating in gradient flow.

Neural NetworksDeep LearningGradient DescentTencent
Gradient Descent With RegularizationHard

Tests understanding of optimization math and how L1 vs L2 regularization changes gradients and learning dynamics.

RegularizationGradient DescentoptimizationTencent
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2
System Design3 questions · ~24 min
Fraud Anomaly Detection SystemHard

Tests ability to design scalable detection pipelines with appropriate modeling, thresholds, and monitoring.

Feature DriftModel Servinganomaly detectionTencent
Distributed RL for Tencent MOBAHard

Tests distributed RL architecture, training stability, and practical considerations for multi-agent game learning.

distributed trainingModel ServingTencent
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3
Behavioral & Leadership6 questions · ~49 min
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4
More topics4 questions · ~32 min
LLM Training With Limited GPU MemoryHard

Tests knowledge of distributed training, data pipeline design, and memory-efficient LLM training approaches.

llm basicsllm deploymentinference optimizationTencent
Validating Statistical SignificanceMedium

Tests experimental rigor, hypothesis testing, and correct interpretation of statistical results.

Hypothesis TestingStatistical SignificanceTencent
Custom PyTorch Loss for ImbalanceMedium

Tests practical PyTorch skills and correct formulation of asymmetric losses for classification tradeoffs.

functionsTestingpythonTencent
LCS Under Memory ConstraintsHard

Tests algorithmic DP skills and ability to optimize space complexity for constrained settings.

time complexityDynamic ProgrammingAlgorithmsTencent

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