Dear Vishal ,

If im correct you are 2017 batch of engineering so dont worry for cat application ,if you dont have the result of 6th semester then wait for that or else  Also, you  have to fill fields that include total duration of degree, percentage of marks awarded by University/institute, type of University/institution, University name, degree name, year of course commencement and year of completion. You can put your upto 5th semester total marks .Apart from that i have shared a link with you where you will get all information regarding form fill-up of CAT you can refer that .

Hope it will helpful

Thanks