In my opinion, as a student, you must concentrate on subjects like Data structures, Algorithms and Operating Systems (If you have already done a course in these

In my opinion, as a student, you must concentrate on subjects like Data structures, Algorithms and Operating Systems (If you have already done a course in these then go for advanced levels). They are the foundations. Moreover a semester is way too less for C/C++ . Once you have a good grasp on C/C++, learning most of the other languages will be fairly easy.