Real Dev
HackerRank
hackattic
Takehome
Adaface
Daily Coding Problem
Coderslang
Challenge Hunt
Code Arcade
CodinGame
hackattic
Daily Coding Problem
Frontloops
Code Racer
Codewars
Exercism
Based 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: about 3 years 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: over 4 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: over 4 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: almost 5 years ago
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
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
Takehome - Effective and humane coding challenges for candidates
Daily Coding Problem - Get exceptionally good at coding interviews
Adaface - Adaface offers an AI-powered method to automate first-round tech interviews and evaluate candidates for technical roles. Every Adaface assessment is tailored to each job description, to test for the skills that are essential to the job.