I applied for a 12 month internship in the UK around October and got a reply in November saying that they would like to schedule 2 phone interviews (I got to select some dates that I were free). The recruiter was extremely friendly and even linked me to a lot of webpages with information about what kind of questions I can expect in the interview. A lot of which included CS theory such as OOP and data structures. I was scheduled 2 45-minute interviews. Unlike what I expected, I had to complete 2 programming tasks (one in each interview) with no questions about computer science theory. Under the stress of being in an interview, and due to the expectation of CS theory questions, my mind blanked despite having 2 tasks which I could complete with ease - of course I regret being such an idiot - So long as you focus logically on what you do the interview should be a fairly easy process, although the randomness of the code can throw you off guard. The first interviewer was a bit unenthusiastic and intimidating which also threw me off a bit but the second interviewer I had was really nice and helpful in describing what we had to do properly. Due to my idiocy I did not progress to the next stage.