I started with a take-home assignment that had a one-week deadline. The task was to implement Memcached's get, set, delete, gets, and cas functionality.

After submitting the take-home, I received a standard template response from the recruiter stating that the code did not meet their standards. No feedback was provided, despite the time invested.

This experience suggests it's not worth interviewing if feedback is not given. If the company was genuinely concerned about the code quality, they could have sent an NDA.