CGL

Yes, you are surely appear in competitive exams. Eligible criteria for these competitive exams is you should have your graduation degree.

Hello Rahul,
Well, the truth is that CAT coaching will help you up to an extent only for these exams. Further, you have to practice on your own.
All the best.

Hello Rahul,
If you are seeking admission for management courses, then you can give MAT XAT SNAP etc. Besides CAT after taking the CAT coaching. But, if you want a government job, then appearing for exams like SSC CGL, IBPS PO, SBI PO etc. will help you. I hope you will find this information helpful.

Yes you are eligible. Candidate must hold a Bachelor's Degree from any of the recognised universities Candidates who have appeared for the qualifying examination and are awaiting results or those who are yet to appear for the qualifying examination are also eligible for the Preliminary Examination.

Yes, Nowadays more questions on inventors and factual portion.

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 CG

COMPARISON
Now if we compare both the jobs, then both are prestigious jobs in Govt. providing you incentives, money. Now, it depends on you what you want in your life. If you want to gain some power of administration in your hand and also want money, then surely you must go for SSC-CGL because in PO