Most programmers know this, but interviewers will likely look for a deep understanding of MVC, and some explanation or examples on how/why/ when you used it.
MVC- Model, View, Controller – is simply a way of organizing your code into 3 separate layers each with there own job.
Model – Usually contains data access code and all of you business logic code.
View – Contains markup/design code, generally html,xml, json.
Controller – Usually contains very little code, just whatever is needed to call the Model code and render the View code