A few useful links:
https://www.hackerrank.com/
https://leetcode.com/problemset/all/
https://www.practicepython.org/
https://www.codingame.com/
https://wiki.haskell.org/H-99:_Ninety-Nine_Haskell_Problems
https://tutorialsbookmarks.com/30-days-of-code-solution-hackerrank/
https://github.com/karan/Projects
https://quescol.com/interview-preparation/python-coding-question
https://www.youtube.com/watch?v=3AHzWOWRWvQ
https://www.edureka.co/blog/interview-questions/python-interview-questions/
https://towardsdatascience.com/7-tips-i-wish-i-knew-before-clearing-all-hackerrank-python-challenges-4673e0fe14d3