Their interview questions are pretty basic and the whole product is pretty much useless. Waste of time and money.
productboard - Beautiful and powerful product management.
LeetCode - Practice and level up your development skills and prepare for technical interviews.
Aha - Aha! is the new way to create visual product roadmaps. Web-based product management tools and roadmapping software for agile product managers.
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
ProdPad - ProdPad helps your team gather ideas, surface the best ones and turn them into product specs, and then put it all on a product roadmap.
Daily Coding Problem - Get exceptionally good at coding interviews