When comparing CareerCup vs CheckiO, the Slant community recommends CheckiO for most people. In the question“What are the best coding challenge sites?” CheckiO is ranked 6th while CareerCup is ranked 17th. The most important reason people chose CheckiO is:
Users can publish their solutions for different problems and other users can review the code and give their opinions on how they would have solved the problem. Sometimes, some of the most active users get their code reviewed by Guido Van Rossum (the creator of the Python language) himself.
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Pros
Pro Large number of questions and challenges
CareerCup was founded in 2005 and it has been popular for a lot of time. During this time users have been posting a lot of questions and challenges and as a result have created one of the largest databases of interview questions.
Pro Real-world interview questions
CarerrCup is more of a discussion forum on which people post real-world interview questions from real tech companies. As such it's a powerful tool for preparing for interviews and real problems that people may find.
Pro Community backed solution reviews
Users can publish their solutions for different problems and other users can review the code and give their opinions on how they would have solved the problem.
Sometimes, some of the most active users get their code reviewed by Guido Van Rossum (the creator of the Python language) himself.
Pro Available in multiple languages
CheckiO crowdsources translations for problems. Currently problems have been translated in 10 languages. So it's highly possible that eventually more languages will be supported.
Pro Ability to create new challenges
New missions can be created and uploaded using GitHub. After that is done, it's suggested to CheckiO and if it fills all the requirements after being reviewed by a CheckiO team member, it's pulled into the game.
Pro Challenges from GitHub, O'Reilly, Dropbox and Hubspot.
Cons
Con Not for absolute beginners
CheckiO does not teach syntax, instead it teaches how to solve problems using a particular programming language therefore some basic programming knowledge is required to start.