LeetCode - Practice and level up your development skills and prepare for technical interviews.
Preplaced - Your dream job is at Preplaced
Edabit - Learn to Code in 90 Days or Less
Codewars - Achieve code mastery through challenge.
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
Exercism.io - Download and solve practice problems in over 30 different languages.