According to FreshersJobs.com, if you're hired, you'll get a phone call from HR within a week, where they'll tell you about your salary and benefits, and then send an electronic version of the offer to your private email address if you have no questions.
Candidates need to respond to the email within the deadline, and then prepare the paper version of the paperwork required to join the company, and report to the company on the day of joining with the paperwork.