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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: over 4 years ago
GitHub Codespaces - GItHub Codespaces is a hosted remote coding environment by GitHub based on Visual Studio Codespaces integrated directly for GitHub.
CodinGame - CodinGame provides users with a fun and effective way to learn coding that eschews the rigid structure of traditional teaching methods.
CloudShell - Cloud Shell is a free admin machine with browser-based command-line access for managing your infrastructure and applications on Google Cloud Platform.
hackattic - No nonsense, real world programming challenges
CodeTasty - CodeTasty is a programming platform for developers in the cloud.
Daily Coding Problem - Get exceptionally good at coding interviews