At first there was GD. Each group had around 7-8 people. My GD topic was 'Is Govt. doing enough in the field of CyberSecurity?'. Other GD topics included Olympics, Android/iOS , Social Networking Boon or Bane?. Around 15 people were selected for technical interview.
Due to shortage of time, I had both HR+ tech interview together. All the questions were asked from my resume itself. Good Preparation of your Resume, can make the interview a cakewalk. They expect your resume to have something related to security. For me, the questions involved mainly on Linux and Networking.
Deep interest and work in the security field will help you easily clear the interview.