Tiger Analytics Senior Analyst, Data Scientist interview questions

* Round 1: (hackerearth online coding. 1hr 15 min) 1. Given notes and coins values as input, write a program using Python OOPS concepts to separate out Notes and Coins. 2. Program using bit manipulation, brute force method times out. We have to make it efficient using concept that x & y = k means if we keep repeating & y to this, we keep getting k. There were 8 other python conceptual questions but they had less weightage. * Round 2: (F2F interview) Have to share screen and code it live in any python env and dry run for some test cases. - General intro and questions on experience and projects done. - Given a range of numbers, identify all pythogorean triplets in them. - Program for factorial of a number * Round 3: (F2F interview) - General intro and questions on experience and projects done. - Comparing validation metrics used in classification project - About Cross validation and how it works; how to split data in general - How to choose k in k-means clustering - Explain bias-variance trade off; how to implement in projects * After this, had general discussion with HR and salary negotiation.