CBSE 12th

Just appear for NCHMJEE exam which is held every year.

ISOEH(Kolkata) provides the certified ethical hacking course. You can go for it.
Visit their official website to get complete details and eligibility!
www.isoeh.com
Good luck!

No, you will have to appear for the exams step by step.

Hello Chandan,
PSUs (Public Sector Undertakings) like HPCL, BPCL, IOCL, NHPC, NTPC, Power Grid, CONCOR, GAIL, DDA, BHEL, BEL, TCIL, NALCO, MECL, MECON etc accept GATE Score is because GRADUATE APTITUDE TEST in ENGINEERING (GATE), so you have to qualify GATE exam.

You have to give CMAT or CAT. If you have good scores in CMAT or CAT then your marks are not a problem. Most colleges give maximum weightage to test scores.

The minimum marks that is required for PSU jobs in 12th board exam is 60%.

Hi Shubham,
You surely have certain chances and a lot of opportunities to improve you profile in order to get into an IIM. Make sure to do better in graduation and take experience with a good name along with your percentile above 98. That's how you're going to end up in an IIM.
All the best.

For engineering entrance exams like JEE, BITSAT, a minimum of 75% would be enough to be eligible for the exam. Percentage matters when you want to want to take admission in universities like DU for B.Sc courses.

I don't think that you will be able to fill in the CAT form as you do not meet the minimum criteria of 50%. Please have a look at the eligibility criteria for appearing in CAT examination.