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Updated weekly · Last refresh Oct 17

ByteDance AI Engineer Interview Questions

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

50questions
~10htotal time
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1
CodingStart here. 11 questions · ~129 min
Count Valid Digit Strings with WildcardsHard
Practice

Count digit replacements with no equal adjacent characters using dynamic programming.

combinatoricscoding challengeDynamic ProgrammingByteDance
House Robber I and IIHard
Practice

Use space-optimized dynamic programming to maximize robbery profit on linear and circular house arrangements.

Dynamic ProgrammingArraysAlgorithmsByteDance
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2
System Design10 questions · ~117 min
Troubleshooting Training Loss BehaviorsMedium

Diagnose decreasing, stagnant, oscillating, diverging, and NaN training loss through a structured ML training pipeline.

gpu hardwaredistributed trainingFeature DriftByteDance
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3
Generative AI & LLMs10 questions · ~117 min
Explain LLMs vs Traditional MLEasy

Explain what an LLM is and how it differs from traditional machine learning models in training, behavior, and typical use cases.

llm basicsMachine Learningmodel comparisonByteDance
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4
Model Evaluation8 questions · ~94 min
Diagnose and Improve Underperforming ModelMedium

Structured approach for diagnosing an underperforming ML model and improving it through evaluation, error analysis, and threshold or model changes.

PrecisionAccuracyRecallByteDance
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5
NLP3 questions · ~35 min
Explain Transformer Architecture BasicsEasy
Recently asked

Explain the transformer architecture and why it became a core building block for modern NLP systems.

Neural NetworksLanguage ModelsDeep LearningByteDance
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6
Machine Learning4 questions · ~47 min
Hyperparameter Tuning for ML ModelsMedium

Explain a practical process for tuning model hyperparameters using cross-validation and overfitting checks.

Hyperparameter TuningCross-ValidationBias-Variance TradeoffByteDance
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7
More topics4 questions · ~47 min
Python Decorators RoleMedium

Assesses language feature understanding.

functionsdecoratorspythonByteDance
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