XAT

No, you need to take the test again.

KJ Somaiya Institute is best for PGDM and MBA in Mumbai and cut off is approximately 99% in CAT.

Hi,
This cant be predicted. As know your score or percentile, you need to know:
1) Total no of candidate can appearing in the exam .
2) Number of candidates who have scored less marks than you.
Both are unknown to you so you have not calculate it.Because this information is hidden to candidate.
If you collect above two date, then you can easily calculate your percentile.

Hi,
Some colleges do ask to apply for colleges before the exam and some after the exam. If you haven't apply then you will not be able to get admission. Or else you can also speak with the college once.

The eligibility criteria for CAT is 50% in graduation. But for XAT there is no specific criteria regarding the graduation scores. So you are eligible for XAT, MAT, CET.

No, It will reduce your scope area. CAT is always preferred by most of colleges however, XAT is for particular college.
I would rather say CAT Is always better.

Only CAT because ISM, Dhanbad accepts CAT score.

Hello!
The top ten B-schools accepting XAT scores are:-
1. SP Jain, Mumbai.
2. XLRI, Jamshedpur.
3. SIMSREE, Mumbai.
4. XIME, Bangalore.
5. TAPMI, Manipal.
6. KJ Somaiya, Mumbai.
7. IMT, Ghaziabad.
8. Great Lakes, Chennai.
9. GIM, Goa.
10. Welingkar, Mumbai.
Other notable mentions: IRMA(Anand), XIM(Bhubaneshwar), IPE(Hyderabad), Amity(Noida), etc.