Four rounds in total.

1st Round: 2 hours of written round in AMCAT.

2nd Round: Technical interview (asked about networking concepts like routers, switches, OSI, and TCP layers).

3rd Round: Technical interview (questions on packet routing protocols, IP classes, types of layered devices, etc.; was also asked to explain on-board how two or more PCs talk to each other and was asked many questions related to that).

4th Round: HR Interview (asked on final year project and other HR-related questions; the easiest interview among the lot).

I would highly recommend anyone to go through the basics of networking concepts the day before Nokia's recruitment process. Doing that would highly increase your chances of answering the questions and thereby increasing your chances of being offered a position, just like I did.

Wish you the very best!

OSI and TCP layers

different types of layered devices

IP classes

IP subnetting

and other fundamental networking concepts