Prep for the interview

Hi! I'm currently preparing for the interview to one of the big IT corporations. I was asked to prepare from data structures and algorithms. I'm a full time developer but I've not graduated from the IT but from a different technical speciality. My role naturally evolved into a full SWE. However, I have only the practical, hand-on experience. So now when I start to study linked lists, trees and graphs I find it interesting but learning by heart all