Not learning data structures and algorithms. Not learning programming languages. Actually not learning anything to answer during a job interview.

I am more of a learn-while-you-do kind of guy. I never learn anything, instead just do it. Interviewers think I am useless because I know nothing. But I can get a job done, any kind of job done. I have no learning period, I can start working from first day in a all new language, in a all new IDE, in a all new OS.

I know nothing, and I learn nothing. I am a problem solver. You got a problem, I can solve it.