Fair, usually 3 rounds before offer is provided. At first it is telephone interview, followed by F2F where a case study needs to be processed and then presented to the hiring manager. Offer interview follows. Whole process can take up to 3 weeks
The interview was quite extensive but very comfortable after a few minutes it seemed more like you were having a chat than an interview.
I was tuped over to HPE from T Systems in 2011
Expect it to be very professional