R.V. College of Engineering

Generally, when a company visit for placement in any college or university, they have very limited time to select the candidates. But the institute or colleges tried to make it open for as many candidates as they can. Now for saving time, most of the companies apply some filters which help them to control the crowd. Mostly, the company fixes a percentage cap and some other eligibility clearance rounds of GD and PI. And all this happens at the college level only. Now the candidate who cleared all this is eligible for main interview rounds where the HR and technical team check your confidence and knowledge about the subject.
I hope this answer clarifies your doubt.