Air India Data Scientist Interview Questions and Answers

Basic coding questions

Q1. Explain in detail about current project? Reason for choosing the algorithm, evaluation metrics and analysis of data
Ans. 
Developed a predictive model for customer churn using logistic regression
• Chose logistic regression for its interpretability and ability to handle binary outcomes

• Evaluated model performance using accuracy, precision, recall, and F1 score

• Analyzed customer data including demographics, purchase history, and customer service interactions
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Q2. Python and sql coding questions - basic
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Q3. Linear regression, xgboost, precision, recall, F1 Score,Correlation
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Q1. Picks one of the Projects to discuss the structure and methodology.
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Q2. Reverse a String
Ans. 
Reverse a given string
• Use built-in functions like reverse() or slice() in Python

• Iterate through the string in reverse order and append characters to a new string

• Convert the string to an array of characters, reverse the array, and join it back into a string
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Q3. Basic ML Questions about Resume Projects
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Q4. What is Regularization?
Ans. 
Regularization is a technique used to prevent overfitting in machine learning models by adding a penalty term to the loss function.
• Regularization helps to reduce the complexity of the model by penalizing large coefficients.

• It adds a penalty term to the loss function, such as L1 (Lasso) or L2 (Ridge) regularization.

• Regularization helps to improve the generalization of the model by discouraging overfitting.

• Examples of re...read more
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Q5. Basics about Forescasting.
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Hackerank Assignment

Q1. Coding and ML questions
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Q1. About projects and questions related to that
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