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Updated weekly · Last refresh Aug 30

L&T Technology Services Data Scientist Interview Questions

The questions to prepare for a L&T Technology Services Data Scientist interview. Questions from real interview reports rank first. Updated weekly.

27questions
~4htotal time
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1
PipelinesStart here. 7 questions · ~56 min
2
Product Sense3 questions · ~24 min
3
Machine Learning7 questions · ~56 min
Prevent Overfitting in ML ModelsEasy

Explain how to reduce overfitting using regularization, validation, and model selection.

Cross-ValidationBias-Variance TradeoffRegularizationL&T Technology Services
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4
Statistics & Probability3 questions · ~24 min
Linear Regression Model AssumptionsEasy

Tests understanding of regression assumptions needed for reliable inference and prediction.

RegressionHypothesis TestingStatistical SignificanceL&T Technology Services
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5
More topics7 questions · ~56 min
Analyze Customer Feedback for InsightsMedium

Build a customer feedback NLP pipeline using sentiment analysis, topic modeling, and classification to surface actionable product insights.

Text ClassificationSentiment AnalysisTokenizationL&T Technology Services
Diagnose Underperforming ModelMedium

Diagnose why a model is underperforming and decide whether the issue is thresholding, class balance, or a deeper data problem.

Hyperparameter TuningCross-ValidationBias-Variance TradeoffL&T Technology Services
Extract Insights From Large DataHard

Tests data analysis strategy, scalability thinking, and insight generation.

KPIsLeading IndicatorsDiagnosisL&T Technology Services
Optimizing a Slow SQL QueryMedium

Tests diagnosing query bottlenecks and applying indexing, query rewriting, and execution-plan reasoning.

JoinsData WranglingAggregationsL&T Technology Services
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
The finish line: interview-readyComplete all 27 questions plus 3 hands-on drills to finish this plan.