I've been programming for 3-4 years now, have memorized tons of functions and operators, across a variety of languages, and have never once needed to use the mo

I've been programming for 3-4 years now, have memorized tons of functions and operators, across a variety of languages, and have never once needed to use the modulo operator for anything, so I personally don't place it at the top of list of priorities for what someone should know. As an employer and interviewer I'm more concerned the person has a grasp on general programming issues and the ability to problem solve than testing their knowledge of narrow subjects.