CAT

You must know that self study is a better way of learning because you have to do it. You have no option. Keep this thought apart. You can do it, just go on. All the best for your near future.

Common Entrance Test or CAT analyses the skills of the aspirant in four sections: Quantitative Aptitude, Verbal Ability, Logical & Analytical Reasoning and Data Interpretation. It is also a test of time management. Refer following link for further details:
https://www.shiksha.com/mba/exams/cat/syllabus

September, 20 is the last date to apply for it.

If you have not given CAT, you can search for the colleges that give admission on basis of graduation marks.

If you are trying for the IIMs, you can opt to the CAT and if you are looking for foreign colleges, you can go with GMAT.

Graduation marks is not given so much preference as long as you have good marks in CAT and MAT.

Hi Akash
If possible please give both the exams because your scores are very good. You can definitely get good colleges through CAT and GMAT. If you are looking for abroad studies then you should give GMAT also. If you are not interested in studying abroad then go for CAT only.

Hello! All the IIMs accept the scores of only CAT and no other exam for their further admission processes. So without CAT, it is next to impossible to get admitted into an IIM. Though for the other non-IIMs, giving CAT is not compulsory; there are other exams too like XAT, CMAT, CET, etc.

If you are from general category, you have to score above 98 percentile. My friend scored 96 percentile from general category, but didn't get call from any of the IIMs.
Good luck!