I applied in-person. The process took 6 days. I interviewed at RailTel (Gurgaon, Haryana) in Dec 2017
Interview
Interview was good, they asked good basic questions on core java, design patterns and frameworks like spring Boot, Hibernate.
You need to be really good at your coding.
The Interviewer is confused on his requirements in his team.
He will just give you the scenario without any point whether it is feasible or not
Interview questions [1]
Question 1
OOPS Concept, Adv. java, Frameworks in java, Design Patterns