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Updated weekly · Last refresh Aug 30

Appzen Machine Learning Engineer Interview Questions

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

49questions
~7htotal time
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1
Model EvaluationStart here. 6 questions · ~49 min
Choose Metrics for Imbalanced DataMedium

Choose the right evaluation metric for an imbalanced dataset and explain why accuracy can mislead.

F1 ScorePrecisionAUC-ROCAppzen
Explain Core Classification MetricsEasy

Explain precision, recall, F1-score, and ROC-AUC for a classification model.

F1 ScorePrecisionAUC-ROCAppzen
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2
NLP10 questions · ~82 min
Explain Self-Attention MathematicallyMedium

Explain the self-attention formula, its tensor shapes, and how it is used inside a transformer encoder.

Neural NetworksLanguage ModelsTokenizationAppzen
Fine-Tune HuggingFace for NERMedium

Tests your ability to fine-tune transformer models for NER, including data prep, training, and evaluation.

Hyperparameter TuningLanguage ModelsNamed Entity RecognitionAppzen
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3
Machine Learning7 questions · ~57 min
Bias Variance Tradeoff BasicsEasy

Explain how bias and variance affect generalization, and how model complexity changes the balance.

Cross-ValidationBias-Variance TradeoffSupervised LearningAppzen
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4
Pipelines14 questions · ~115 min
Integrate a New Microservice PipelineMedium

Approach for integrating a new microservice into an existing pipeline architecture with dependency management, idempotency, and data quality controls.

InfrastructureOrchestrationDependenciesAppzen
Scaling ML PipelinesMedium

Approach for scaling machine learning pipelines as data volume, retraining frequency, and downstream usage grow.

Data QualityInfrastructureETLAppzen
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5
Coding12 questions · ~98 min
Cache Lookups With Hash MapsEasy

Tests your ability to use common data structures to improve time complexity.

Hash TablesArraysStringsAppzen
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