IBM Research Data Scientist Interview Questions and Answers for Experienced

OOPS concept and Dynamic Programming coding challenges

It was difficult and was on hackerrank

Q1. How to find a largest number in a list without using inbuilt function
Ans. 
Iterate through the list and compare each element to find the largest number.
• Iterate through the list using a loop

• Compare each element with a variable storing the current largest number

• Update the variable if a larger number is found
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Q1. Basic ML questions based on your project, python basic questions
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Basic python questions on pandas,numpy, and basic SQL questions on windows function like lag

Q1. Tell me about scaling. ensemble techniques. precession, recall, f1 score, ROC AUC LSTM and RNN Feature selection and extraction optimization function loss functions word embedding word2vec tf-idf outliers...read more
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Python test to check basic understanding of algo and classs

Q1. Discussion around project and technical round on ML
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Q1. Basic culture check question and salary discussion expectation.
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Test+2 interviews(technical and statistics)

Basic guestimates and case studies