EPAM Systems Senior Data Scientist Interview Questions and Answers

Q1. Analytical lifecycle
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Q1. Model deployment strategy
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Related to basic statistics, and case study on sample design

Q1. Explain the answers of case study on aptitude test
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Q2. Sample design related questions
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Q1. Tell me about your self?
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Q2. What is maths and stats
Ans. 
Maths and stats refer to the study of mathematical concepts and statistical methods for analyzing data.
• Maths involves the study of numbers, quantities, shapes, and patterns.

• Stats involves collecting, analyzing, interpreting, and presenting data.

• Maths is used to solve equations, calculate probabilities, and model real-world phenomena.

• Stats is used to make informed decisions, draw conclusions, and test hypotheses.

• Both ma...read more
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Confusion matrix what are your job rolls explain me Gradient boosting algorithm?

Working on aeronautical problems for different clients

Q1. What is your goal in life
Ans. 
My goal in life is to make a positive impact on others and continuously learn and grow.
• To make a positive impact on others through my work and actions

• To continuously learn and grow personally and professionally

• To achieve a work-life balance that allows me to pursue my passions and interests
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Basic DP, Array Questions

Q1. Resume Walkthrough and Discussion, Medium level coding questions
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Q1. Discussion with Manager
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Q1. Normal HR round
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Easy array questions.

Q1. Explain projects from resume.
Ans. 
Developed a machine learning model to predict customer churn for a telecom company.
• Used Python and scikit-learn to preprocess data and build the model

• Performed feature engineering to improve model performance

• Evaluated model using metrics like accuracy, precision, and recall
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Q2. Questions on image processing and computer vision.
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