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Code Arcade
CodinGame
Frontloops
hackattic
Daily Coding Problem
Code Racer
CodeSignal
Codewars
Real Dev
hackattic
Takehome
HackerRank
Good Code
Frontend Mentor
Coderslang
Frontloops
Code ArcadeBased on our record, Code Arcade seems to be more popular. It has been mentiond 4 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
You can practice your code solving skills here: Https://app.codesignal.com/arcade Https://leetcode.com/problemset/all/. Source: 12 months ago
CodeSignal's Arcade (signup required) has a lot of practice problems at different levels that can help break you out of the mindset of copying tutorial code. Source: about 2 years ago
I like the Databases section of CodeSignal Arcade. Problems increase in difficulty, plus I've found it's the platform a lot of companies use for SQL assessment so you'll get a good sense of the type of questions to expect. Source: about 2 years ago
Codesignal has a good set of SQL questions. Not sure they "support" Postgres, but there's 84 free levels under the Arcade section. https://app.codesignal.com/arcade. Source: over 2 years ago
CodinGame - CodinGame provides users with a fun and effective way to learn coding that eschews the rigid structure of traditional teaching methods.
hackattic - No nonsense, real world programming challenges
Frontloops - Level up your frontend skills with handcrafted tasks
Takehome - Effective and humane coding challenges for candidates
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
Daily Coding Problem - Get exceptionally good at coding interviews