CAT

Hello Sakshi, No its not compulsory Try for NAEMD its a best institute for event management courses
eligibilty criteria:- Applicant needs to successfully complete the evaluation process including Interview, Test, and/or Project submission, etc. Shortlisted Applicant shall be called for Personal Interview or Telephonic Interview (for outstation Applicant)
The prime objective of evaluation process is to check the candidate's personality traits, academics, goals and self awareness level
Applicant will have to submit the Original certificates and documents as required
Selected Applicant shall be informed by phone / email regarding their selection and payment of fees.

First of all, take a mock. No matter how poorly you perform in it at-least you will get to know where you stand before starting your preparation, which are the areas you need to focus on. There are 3 sections in CAT VA-RC, DI-LR and quants.
VA-RC: The only way to score well in this section is to read various topics. It does not test your vocabulary but your understanding of the written text. You must be able to read and understand anything and everything. Please avoid comfortable topics. You can start with editorials of any newspaper.
DI-LR: There is no other way but practice. Practice and practice and don't lose your cool of head if you are unable to understand the set. Don't stop, just proceed.
Quants- Clear your concepts because questions are comparatively easy. You can try Dinesh Miglani Tutorials, it is very helpful.