Business Management Studies

The experience you have is such a great thing, since you have a very good business experience, just choose a stream like business analytics or project management which can boost your business career, And choose a choice based on your past experiences always.

Yes, it is worth of doing PGDM from NIA. The college is good and they can provide you with a quality education.

Yes, you are eligible for PG course in advertising & marketing communication.

Yes, the minimum percentage is a must and should be required, while 34 is very less percentage, where they may not consider you but, try your level best.

It's not possible up to most of the extent because your score should be more than 55% in all the classes.
But, try any other alternative source. You can find it definitely.
Definitely, there will be a solution.

MBA programme require you to submit a GMAT score in the Birmingham city Business school's MBA programme. GMAT score of 500 is preferable, but is not an admission requirement. IELTS is needed for international applicants.

Obviously, the MBA will be of two years. In the case if you want to do an 1 year MBA or PGDM, prefer the colleges which are offering an international Masters degrees in India which will be of 12 months or 15 months based on the course, And my suggestion it would be better if you choose some course like business analytics, which can boost your career as of you did your MBA in sales and marketing and finance.
All the best.

Yes, for any MBA course, one should be given an entrance examination, while these days some universities are taking students just based on the GDPI rounds without any examinations. So, it would be better if you contact the university for admission process.

You have to appear for entrance exams in order to secure MBA seat.

Yes, you can apply for government job and start preparation.