Is ragging a big issue in NITC?

Yes, there are some ragging issues at NIT Calicut but it is not serious.

• When you arrive on the campus, there will be a casual junior-senior interaction. You should try to get associated with the seniors of your state, it is important to listen to them and also act a little bit of jolly with them. 
• They can ask you to do some tasks for them. Once you get in their side, you can do anything on the campus. This is often referred to as State in.
• Then, there is State out, where you will need to work harder a bit more. You may not get a fresher party but will definitely have some peace of mind.

In the end, you should need not fear the ragging because the seniors cannot do anything serious as NITC has strict measures against that.