BCA

Dear,
Through NIOS, if you would get top engineering colleges then your engineering degree will help you to get good opportunities and companies. But if you did it from any average college, then it will be a good fight for job. According to me, you should consider any regular board like CBSE, ICSE or any other state board.
All the best.

Ethical hacking is basically about learning how to find security vulnerabilities in IT systems. If you want to learn cyber security you can enroll for any of the training programs by http://pune.cssrl.in The training is possible in regular classroom or in online mode. The career options in the field of cyber security are growing a lot these days.
Of course, a lot of other options are also there.

Vivekananda Institute of Professional Studies has good faculty members, infrastructure and placement opportunities.
Amity is also a good college but at the end, it is on you to make a choice where you want to go, GGSIPU or Amity University.

Vivekananda Institute Of Professional Studies is amongst the top colleges affiliated to GGSIPU. Infrastructure, faculty and placement here are good.
You can check the previous year placements of the college on the college's website.
www.Vips.edu

Hi Narayan,
Yes, you can give CDS examination after BCA. The minimum eligibility criteria (educational qualification) for CDS:
For IMA /OTA : A degree from a recognized University or equivalent.
For Indian Naval Academy: Bachelor of engineering.
For Air Force Academy: Degree of a recognized university (with physics and mathematics at 10 +2 level ) or Bachelor of engineering.

You can join any prestigious institutions in Delhi NCR area. Bachelor's is just about knowing the basics very clearly, you can study anywhere you want to gain knowledge. But a good college is required to support from the back and show you the quicker path. Keep learning and gaining knowledge.

It's up-to you, and your interest area. You can pursue both the alternatives. BCA+MBA looks little odd, but still you will get a placement you can survive with. But BCA + MCA looks normal and it will work normal. You can earn a good penny out of it, if you are interested in Computer Applications.