I was given a dev server access and asked to troubleshoot some issues by giving access to Database or application servers. Although the questions asked are not so difficult, practically working on them is the challenge, which went fine with me :-).
5 Rounds. OS, Database, Design, Coding and Behavior.
Each round take around 45, expectation will be more like an Engineer with a capability to manage a very large scale systems.
Interview questions [1]
Question 1
Regular work related questions but bit more large scale focused.