Airline Airindia Data Engineer Interview Questions and Answers

Q1. Questions about data factory
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Q1. Tell me about a time when you went out of your way to contribute to a project
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Q1. Differentiate between RISC and CISC
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RISC stands for Reduced Instruction Set Computing and CISC stands for Complex Instruction Set Computing.
• RISC processors have a smaller set of simple instructions, while CISC processors have a larger set of complex instructions.

• RISC processors typically execute instructions in one clock cycle, while CISC processors may require multiple clock cycles.

• RISC processors rely on optimizing compilers for performance, while CISC...read more
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Q2. Define and differentiate interpreter and compiler
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Interpreter translates code line by line while compiler translates entire code at once.
• Interpreter: translates code line by line, slower execution, easier debugging (e.g. Python)

• Compiler: translates entire code at once, faster execution, harder debugging (e.g. C++)
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Q1. C++ fundamental
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Q2. Reverse linked list
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Basic leetcode problems

Q1. Basic java questions
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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. Frequency of character
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The question is asking about how often each character appears in a given string.
• Iterate through the string and count the frequency of each character using a hashmap.

• Return the hashmap with characters as keys and their frequencies as values.
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