Their interview questions are pretty basic and the whole product is pretty much useless. Waste of time and money.
LeetCode - Practice and level up your development skills and prepare for technical interviews.
Python - Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java.
Daily Coding Problem - Get exceptionally good at coding interviews
Java - A concurrent, class-based, object-oriented, language specifically designed to have as few implementation dependencies as possible
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
Rust - A safe, concurrent, practical language