Infosys

Infosys

Global leader in next-generation digital services and consulting.

3 Rounds ~14 Days Medium
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The Interview Loop

Recruiter Screen (30 min)

Standard fit check, behavioral questions, and resume overview.

Technical Loop (3-4 Rounds)

Deep dive into domain knowledge, coding, and system design.

Interview Question Bank

Data Scientist • Coding • easy

Write a Python script to perform a cross-validation on a dataset using Scikit-Learn, and explain why cross-validation is preferred over a simple train-test split.

#Python #Scikit-Learn #Cross-Validation
Practice
Data Scientist • System Design • hard

Design a recommendation system for an e-commerce client to suggest products based on user browsing history and past purchases.

#Collaborative Filtering #Content-Based Filtering #Matrix Factorization
Practice
Data Scientist • Technical • medium

What is the curse of dimensionality, and how do you address it when working with high-dimensional enterprise data?

#PCA #Feature Selection #Dimensionality Reduction
Practice
Data Scientist • Technical • hard

Explain the mathematical intuition behind Support Vector Machines (SVM). What is the kernel trick and when do you use it?

#SVM #Mathematics #Kernels
Practice
Data Scientist • Technical • medium

Explain the difference between Random Forest and Gradient Boosting. Which one would you prefer for predicting client churn for a telecom client and why?

#Ensemble Methods #Bagging #Boosting #Classification
Practice
Data Scientist • Technical • medium

What is the difference between K-Means and Hierarchical clustering? How do you determine the optimal number of clusters?

#Clustering #Unsupervised Learning #Elbow Method #Silhouette Score
Practice
Data Scientist • Technical • medium

Explain L1 and L2 regularization. When would you use Lasso over Ridge regression in a predictive maintenance model?

#Regularization #Regression #Feature Selection
Practice
Data Scientist • Technical • medium

How do you handle highly imbalanced datasets in a fraud detection model for a banking client? What metrics would you use?

#Imbalanced Data #SMOTE #Precision-Recall #F1-Score
Practice

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Meet Your Interviewers

The "Standard" Interviewer

Senior Engineer

Focuses on core competencies, system constraints, and clear communication.

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Think Out Loud

Always explain your thought process before writing code or drawing architecture.

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