MBA Entrance Exam

It depends on you. Both have equal scope, so if you want to do MBA from IIM, it is good and also if you wants to do MBA from any foreign University, it is also good, so choose which suits you.

In graduation, you need at least 50% marks for CAT or GMAT from any recognized University.

Yes, there are many exams:
CAT Entrance Exam.
CAT Full Form: Common Admission Test.XAT Entrance Exam.
XAT Full Form: Xavier Aptitude Test.
GMAT Entrance Exam.
GMAT Full Form: Graduate Management Aptitude Test.
CMAT Entrance Exam.
MAT Entrance Exam.
ATMA Entrance Test.
NMAT Entrance Exam.
SNAP Entrance Exam.

No, there is no restriction on number of attempts for giving CAT entrance exam. You can sit for CAT entrance exam multiple times.

I don't think you will get admission there with your score, from what I get through the internet the cutoff is indicated in the range of 150-180

Hello,
With that good score, chances are quite slim to get admission into either JBIMS or SIMSREE, if you are a general category student. Try for the offline rounds. Good luck.

Hello,
Yes, apart from CAT and MBA CET, JBIMS also accepts the CMAT scores for admissions to its MS course. The cutoff is usually exceptionally high i.e. 99.98 percentile.

Hello! No good college will give admission at such a low CMAT score since the general cutoff of all decent colleges is 75-80 percentile. Better to reappear for the exam and aim for a much higher score.

Hello! At that CET score, you can try for the PGDM courses of several colleges like SIES, Chetana, MET IES Vivekanand, among others. There is no decent college available for MS course.