The language depends on the school. At my university, classes use Scheme, Prolog, JavaScript, C, C++, SQL, Java, MIPS, Ruby, Objective-C and way too much Python

The language depends on the school. At my university, classes use Scheme, Prolog, JavaScript, C, C++, SQL, Java, MIPS, Ruby, Objective-C and way too much Python (it's the new Java :(). Basically, each professor uses whatever language they want--you're (reasonably) expected to pick up a new language in a weekend. I wouldn't be surprised if there were classes using other languages as well that I just haven't heard about. I really wish we'd have more ML/Haskell but they are only used in a couple of graduate courses as far as I can tell.