From my own experience, the interview was relatively easy. The interviewers (SMs) ask very general questions e.g. educational backgrounds and work experiences. They also ask about a basic case study to see how you tackle with a problem.

got a email from recruiter, did screening test and then was called for the interview. Interview was easy, where do you see yourself in the next few years, why gsk, what would you do if we hire you? It took at least 4-5 months. The hiring process is pretty slow.