B.Tech

Indian BTech degree is recognised in New Zealand. You may check whether your Institute is in approved institutes list of New Zealand. BTech from recongnised Indian Institutes get 10 points while immigrating to New Zealand.

TCS, Infosys, WIpro and HCL are the major recruiters for CS IT freshers

Firstly you need to get into a good engineering college and for that you need to have strong command in physics, chemistry and maths for clearing entrance test then the subjects will depend on which engineering branch you choose

Follow link :
https://www.shiksha.com/jee-mains-cut-off-predictor

Check rank predictor first then college predictor
https://www.shiksha.com/jee-main-rank-predictor
https://www.shiksha.com/jee-mains-college-predictor

Check rank predictor first then college predictor :
https://www.shiksha.com/jee-main-rank-predictor
https://www.shiksha.com/jee-mains-college-predictor

You should hv a valid reason as that will work in your favour only. if you worked somewhere it is self explanatory. If not, then justify it properly.

Hi
you may check with the IITs for M.E /Mtech. You need to qualify GATE first. Read more here.
http://www.thehindu.com/todays-paper/tp-features/tp-educationplus/higher-study-options-in-electronics-and-communication/article2666428.ece

250+ and above 90% is very good for general i think you can get any nit. but around 190-200 is also good. i know one student who got 206 in mains 2015 and around 85% in cbse and got cs in nit Jamshedpur which provides very good placement.