MBA Entrance Exam

Yes, you have to apply separately as the choice of college in the MAT application is not an application to the college.

Yes you can get admission in UIAMS which is not a good department as UBS. But yes for that you also have to give their own exam.

The cut-off would range between 120-150 out of 360 for XSRM course, while for HR would be little higher.
The cutoff for HR was 193 this year.

Yes. After clearing CAT 2017, you will eligible for the 2018-2020 MBA batch.

Actually not, but there are some differences in pattern of exam the level of CAT exam is higher than the level of SSC CGL exam. CAT is more concept worthy examination where are in the SSC CGL speed of your problem solving matters as there are less time. And there are the GK portion too in the SSC CGL which are not in the CAT exam.

Hi,
You can refer the below link for colleges accepting CMAT score:
https://www.shiksha.com/mba/colleges/mba-colleges-accepting-cmat-india

Hi,
You need to take December and February MAT to o pursue MBA in the year 2018.
https://www.shiksha.com/mba/exams/mat/dates

Hi,
You can refer the below link for colleges accepting your score:
https://www.shiksha.com/mba/colleges/mba-colleges-accepting-mat-india

As per AIMK guidelines 50 percentile is criteria for army category students and 70 percentile for general category students in CAT but students who have scored less applies as well and in most of the cases get selected for further process. People are generally judged on the basis of GD and PI regardless of your percentile.
So I would suggest that you can go for it as the chances are equally high.

It depends a lot on your complete profile, your academic background etc. Its difficult to annotate a number without any information about you.