Cardiff University

Its like comparing oranges and apples. Just an advice for further comparisions - compare like business schools in India or compare universties abroad not different programs and schools in India vs abroad. You can't compare Cardiff and Symbiosis,both are entirely different in different contexts.If you need any information regarding admission requirements etc please check the fee and also go through the program curriculum of both which will help you understand a big deal.

Hi Prasad, I believe its the M.Sc programme you are inquiring about. So, naturally you must be a Bachelor degree holder in the relevant subject that is mechanical engineering. You may check here for more details:
http://www.cardiff.ac.uk/study/postgraduate/taught/courses/course/advanced-mechanical-engineering-msc

Yes, Cardiff is one of the reputed universities in UK. But before you study in UK, do some research on post MBA work options, obtaining work permit is very difficult now. Also, a one year Master degree program from UK is not easily recognised in India nowadays.

You need to pass IELTS, GRE or GMAT exams to study abroad.

Yes it is one of the recognized brands with average placements. Though ROI is decent.

MBA Cardiff is a 15 month program. It is a broad program spread.
You'll be learning different subjects every semester. The advantage here is that you can do 1 semester in UK. The average placements in finance is 4.5-5LPA.