CAT

CAT is conducted in online mode. It has 3 sections- Quant, Verbal and DI/LR. Although official announcement of this year is yet to be made. They may do some minor changes as they do every year.

The best time to start preparing is during the second year of your graduation (third year for engineering students)
You can take CAT even after 12th grade but there is no point of doing so because the score of CAT is valid for just one year (unlike GMAT/GRE).
Since you can't do Post graduation (MBA) before completing Undergraduate studies, there is no point in taking CAT after 12th. But I agree that after 12th you will be my better at Math/Quantitative aptitude and better equipped to handle quant section in CAT.

CAT preparation alone will not be enough for XAT as XAT has a section on Decision Making which is very different from anything on CAT question paper. You will need extra preparation for it.

Applyvand register for Cat November exam, dates dor form submission shall be expiring in August. Join coaching classes so you can get complete guidance for preparation.

For top colleges, the answer is no. And same for other colleges. Prepare well & score above 90 Percentile to get into good B-School. Work hard and give more mock exams.
Good luck.

For pursuing MBA You need to give entrance exam like CAT or MAT or CMAT, so it is better to join coaching institutes and prepare well, achieve good score and then go for admissions.

Hello Aditya,
Go for Science as there are many option you will get after completing your graduation for your career.
If you take humanities its easy but not good for successful career.

Preparation for Civil Services and CAT examination along with graduation degree is a good statergy but if you fail or score less then min eligibility criteria your all effort will go waste. You are advised to put sufficient attention to your basic degree also.

Dear Vaibhav,
Symbiosis international university- Pune , Accepting SNAP
Christ university Bangalore- Accepting MAT/CAT/XAT
Are good options in fact very good considering your specifications
All the very best

CAT examination is same for all type of graduates. Syllabus of CAT does not have any specialisation content.