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Updated weekly · Last refresh Aug 30

Censys Machine Learning Engineer Interview Questions

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

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1
Machine LearningStart here. 6 questions · ~54 min
Handle Imbalanced Classification DataMedium

Build a classifier for a highly imbalanced dataset and choose metrics, sampling, and thresholds that fit the minority class.

Cross-ValidationFeature EngineeringSupervised LearningCensys
Supervised vs Unsupervised LearningEasy

Explain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.

Unsupervised LearningFeature EngineeringBias-Variance TradeoffCensys
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2
System Design3 questions · ~27 min
Deploy a Cloud ML Inference SystemMedium

Design a cloud ML deployment system for a security product, covering training, serving, updates, and production monitoring.

InfrastructureFeature DriftModel ServingCensys
Real-Time Threat Detection SystemHard

Tests system design choices for building low-latency threat detection using Censys visibility data.

ML RankingFeature StoreModel ServingCensys
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3
Behavioral & Leadership4 questions · ~36 min
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4
More topics5 questions · ~45 min
Writing a Machine Learning FunctionHard
Practice

Use dynamic programming and backpointers to find the most likely hidden-state sequence in a Hidden Markov Model.

RecursionMathArraysCensys
Improve Underperforming Model AccuracyMedium

Approach for diagnosing an underperforming model and improving accuracy through error analysis, feature work, tuning, and bias variance tradeoffs.

Cross-ValidationAccuracyThreshold TuningCensys
Reliable ML PipelineMedium

Tests your approach to testing, monitoring, and failure handling for production ML pipelines.

OrchestrationIdempotencyQualityCensys
Common Model Evaluation MetricsEasy

Explain common machine learning evaluation metrics and when each is useful.

PrecisionAccuracyRecallCensys
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