Name a coding competition platform that candidates might practice on.

LeetCode is a well-known coding competition platform that offers a wide range of coding problems covering various topics, including algorithms, data structures, and system design. It allows candidates to practice coding skills in a competitive environment, simulating real interview conditions. LeetCode also provides features such as problem discussions, solutions from other users, and even mock interviews, which are invaluable for individuals preparing for technical interviews.

While CodePen is primarily a platform for front-end developers to showcase web development projects, GitHub serves as a collaborative platform for version control and code sharing, and Stack Overflow is a question and answer site for programmers to seek help with coding issues. These platforms, while valuable resources for developers, do not focus specifically on competition-style coding practice like LeetCode does.