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Prep plan
Updated weekly · Last refresh Sep 22

Activision Blizzard Machine Learning Engineer Interview Questions

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

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1
Machine LearningStart here. 19 questions · ~161 min
Predict Live-Service Game RetentionMedium

Build a binary classification model to predict 7-day player retention for a live-service game using gameplay, session, and monetization features.

Cross-ValidationFeature EngineeringSupervised LearningActivision Blizzard
Diagnose Bias-Variance in Churn ModelsMedium

Diagnose bias-variance issues in a Royal Cyber churn model and improve generalization using cross-validation, regularization, and feature engineering.

Cross-ValidationBias-Variance TradeoffSupervised LearningActivision Blizzard
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2
Model Evaluation3 questions · ~25 min
Evaluate Metrics for Rare Player BehaviorEasy

Choose the right metrics for a model with 0.1% positives, where accuracy is misleading and threshold selection drives business value.

F1 ScorePrecisionRecallActivision Blizzard
Metrics for Fraud or ToxicityMedium

Tests metric selection aligned to business impact, class imbalance, and operational thresholds.

PrecisionAUC-ROCRecallActivision Blizzard
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3
Pipelines9 questions · ~76 min
Monitor a Production ML PipelineMedium

Design telemetry and monitoring for a production ML pipeline to catch latency, failures, and data quality issues early.

monitoringtelemetryQualityActivision Blizzard
Design High-Throughput Event PipelineHard

Design a real-time event pipeline that can handle millions of events per second with sub-second latency.

data pipelineevent processinglatencyActivision Blizzard
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4
Coding3 questions · ~25 min
Top K Game Modes Rolling WindowHard
Practice

Use a sliding window, frequency map, and lazy heap to return the top K game modes for every complete window.

Hash TablesaggregationArraysActivision Blizzard
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5
More topics1 question · ~8 min
NLP for In-Game Chat ModerationMedium

Tests NLP modeling and practical considerations for moderation and safety workflows.

Language ModelsText ClassificationTokenizationActivision Blizzard
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