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Updated weekly · Last refresh Aug 30

TCS Machine Learning Engineer Interview Questions

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

50questions
~7htotal time
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1
CodingStart here. 5 questions · ~43 min
Linear Regression From ScratchMedium
Practice

Fit a univariate linear regression model from data using gradient descent or the normal equation.

MathArraysGradient DescentTCS
Two Sum with TargetEasy
Practice
Recently asked

Use a hash map to find two array elements that sum to a target in O(n) time.

Hash TablesArraysStringsTCS
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2
Model Evaluation15 questions · ~130 min
Compare RMSE and MAEEasy

Explain why a home-price model has RMSE of $34.9k but MAE of $18.4k, and what that says about outliers and metric choice.

MAEAccuracyRMSETCS
Evaluate Regression with RMSE and MAEEasy

Explain how to evaluate a regression model with RMSE and MAE, and how to interpret the tradeoff between average and large errors.

RegressionMAERMSETCS
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3
Pipelines13 questions · ~113 min
Backfilling Missing Pipeline DataMedium

Approach for safely backfilling missing data while preserving correctness, idempotency, and data quality.

ETLQualityTCS
Versioning Datasets and ModelsMedium

Best practices for reproducible dataset and model versioning in shared ML pipelines.

Data QualityToolsAutomationTCS
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4
Machine Learning15 questions · ~130 min
Bias-Variance Tradeoff in Model ChoiceEasy

Explain how the bias-variance tradeoff guides algorithm selection and generalization performance.

Cross-ValidationBias-Variance TradeoffRegularizationTCS
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5
More topics2 questions · ~17 min
Handle MulticollinearityMedium

Assesses your statistical techniques for stabilizing regression estimates under correlated features.

RegressionCorrelationVarianceTCS
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