I applied through an employee referral. The process took 2 days. I interviewed at NIIT Limited (Calcutta) in Sept 2014
Interview
4 Rounds :: 2 Days
1. Group Discussion - HR and one more from placement team were present
2. Aptitude Test - No time limit at all
3. Technical - Some Technical Domain Expert had taken it
4. Mock Classroom - By HR and quality lead
Interview questions [1]
Question 1
Group Discussion : Media in our daily life
Aptitude : NIITAT Question set
Technical : very basic question - Do not expect the same as they do not hire freshers for the same role any more
Mock: Topic was given (OOPs) and had to take a mock class in front of quality manager for around 15 minutes
the interview process in NIIT was easy and very smooth....but it was long back ago.. they had four rounds of interviews then..and the complete process took 1 day..got the offer same day