1st Round Technical. Easy DSA or CRUD fundamentals in quick succession.
2nd Round System Design, really easy stuff.
3rd Round, basically just talking and seeing who you are before you get the job.
There are 2 technical rounds and then there will be HR discussion. The interview is generally an hour long, they drill down to basics and then go to architectural depth. Networking and Firewall knowledge is must have to be able to clear the round and proceed ahead.
Interview questions [1]
Question 1
Networking and firewall with security architecture.
Medium leetcode question and a sitdown discussion with a mid level software engineer. I'd suggest preparing for general DSA concepts, like arrays, hashmaps, BFS, DFS, linked lists, trees and REST APIs.