Hello Aspirant

The eligibility criteria for appearing for the CAT exam is that you should have a graduate degree in any stream with a minimum of 50% aggregate in Bachelor or you can appear for the CAT exam if you are in your last year of Bachelors course. Seeing as you are in your 6th semester, you are eligible to sit for the exam Just make sure that you do not have a back log in any semester or even if you do, make sure that you have cleared it before appearing for CAT.

Filling of college applications takes place after the CAT exam's results are announced. After the results are announced, you can visit the websites of your desired colleges and fill out forms for their GD/PI.

Hope this helps