There are generally two types of placements.
- On campus- When companies visit your college to recruit.
- Off campus- Just opposite of on campus placements.
One can easily get 10 lakh p.a. if he/she is from CSE/IT, ELECTRONICS & TELECOMM. This kind of package in Mechanical, Civil are rare until and unless you have a decent cgpa (above 7). Your 10th and 12th percentage should be above 60 percent. Also your basics of what you have taught in this 4 years should be crystal clear which will help you to impress the interviewers. Last but not the least, your communication skills, way of presentation matters.