How does know N programming languages before college translate into being a good programmer/engineer? If you ask that question or interviewee's, then you need to ask yourself what you are really trying to get of someone by asking them that question. My personal hobby in high school was playing bass guitar nearly every damn day, and learning the entire Rush catalog. I knew 0 languages proficiently because of this before I went to college for EE, and I still four pointed all but one class related to my major. So while it would have been nice to have more exposure to programming before I went to college, I wouldn't say that it has hindered my success. (As a side note, I graduated in 2003 so it wasn't like I didn't have a computer and couldn't find a compiler/interpreter somewhere for C++, Java, etc.). Currently I do signal processing which is a coding heavy field, but it aligns well with my music experience and interests. Coding is just a means to an end.
The point being, the only reason that I could think you would ask that question would be someone who is fresh out of school, at which point, what is more important? Is it that they can type "Hello World" in N languages, or that they know how to apply concepts which they learned in school? Personally I would rather have the person who could think for themselves and not need to be hand held on how to solve technical problems over some code monkey that you need to spoon feed. Programming, like anything else, takes practice. And languages can be learned. But if you are as dumb as a rock, then I can only help you so much since you will starting sucking out my productivity.