Adaface
HackerRank
iMocha
TestGorilla
Codility
TestDome
CodeSignal
eSkill
Code Arcade
CodinGame
hackattic
Daily Coding Problem
Frontloops
Code Racer
Real Dev
Codewars
At Adaface, we help companies automate their first-round tech interview with an AI chatbot, Ada. Ada can engage with candidates and screen them for the tech skills required for the role. What's unique: The entire assessment, including code challenges, is conducted via a conversational AI, Ada. Ada can answer questions candidates have about the company/ role, ask technical questions, and code challenges to test candidates' skills and give hints when required- providing for very friendly candidate experience.
Adaface
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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: 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.
iMocha - Make intelligent talent decisions.
hackattic - No nonsense, real world programming challenges
TestGorilla - TestGorilla ATS is an applicant recruiting software that helps companies hire candidates easily without any hassle.
Daily Coding Problem - Get exceptionally good at coding interviews