There were 3 interviews and 1 case study.
First was an interview with the Team Lead, followed by the case study. The remaining 2 interviews were conducted by 2 different VPs.
The questions were general, asking about yourself, your experience, with a few questions on how well you understand GLG's business model and how you can contribute/how it would be a good fit for you.
The interviews thus seemed repetitive and the last two especially seemed redundant since they could have been clubbed into one interview and made the process shorter.