Top 13
Prep plan
Updated weekly · Last refresh Sep 19

Infosys Machine Learning Engineer Interview Questions

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

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1
Machine LearningStart here. 5 questions · ~66 min
Supervised vs Unsupervised LearningEasy

Explain how supervised, unsupervised, and reinforcement learning differ in data, objectives, and evaluation.

Unsupervised LearningFeature EngineeringSupervised LearningInfosys
Feature Engineering and Model PerformanceEasy

Explain how feature engineering improves supervised model performance and how to validate its impact with proper evaluation.

Feature EngineeringBias-Variance TradeoffSupervised LearningInfosys
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 LearningInfosys
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2
System Design3 questions · ~40 min
Design a Travel Recommendation PipelineHard

Design an end-to-end travel recommendation system with retrieval, ranking, feature pipelines, and online feedback loops.

Feature StoreRetrievalRecommendation SystemsInfosys
Accuracy Degradation Over TimeHard

Build a systematic process to detect, diagnose, and remediate declining model accuracy without causing regressions.

feedback loopFeature Driftfailure modesInfosys
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3
Coding4 questions · ~53 min
Missing Values in Large DatasetsMedium
Practice

Implement Pandas-based missing-value handling using deletion, median and mode imputation, or constant replacement.

missing valuesCodingpandasInfosys
Optimize Slow Data PreprocessingMedium
Practice

Optimize record preprocessing with one-pass normalization, filtering, and deduplication to reduce Python latency.

data preprocessingPerformance Tuningclean codeInfosys
K-Means From ScratchHard
Practice

Implement K-means from scratch by repeatedly assigning points and recomputing centroids.

ClusteringArraysAlgorithmsInfosys
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4
More topics1 question · ~13 min
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