NIT

Maybe. Are you from SC/ST or another category?

There are many CFTIs in which you can get admission easily with this rank.

Yes, you can get an NIT if 7434 is your All India Rank.

Your results will make you eligible but sit for CAT, MAT or CMAT and crack the GD-PI.

For admission in NITs, one should get at least 75% in 12th and then appear in the JEE Mains exam and score a good rank in it. Previous years cutoffs for various NITs are on:
josaa.nic.in
Also for choosing NITs, you should visit josaa.nic.in on respective date of counselling as mentioned in the website of JoSAA. There you should fill up your choices
that is you have to arrange the various branches in various NITs as per you want them.
Best of luck.

JEE Mains 2018 College Predictor
Use your JEE Mains 2018 rank to see where you can get admission at the link provided below:
See the courses, colleges & rounds you may crack
The result is based on admissions data of JEE Mains 2017
Get resources & insights on colleges & courses
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor.

You cannot get any NIT or IIIT but you have another options for good private engineering colleges where you can get admission easily. Otherwise, you should go through the state counselling procedure for the government college or the best private college. All the best.
Thank you.

Yes, you can get an NIT easily. There are so many colleges. You can see here, go through the link:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
All the best. Thank you.

No, if you are a general or OBC candidate, NIT college counseling will end up at around 40000 ranks and yours may be above 70-80k. But if you are an SC/ST candidate, may be you can get some lower branch in lower NITs.

If you too are absorbed by ISRO, under the new placement, the bond period will be of 3 years, which actually is an advantage. A degree in aerospace and a work experience of 3 years in a core aerospace organisation like ISRO makes a really good profile for higher studies. However, keep in mind that, as of now, the area of work assigned is random. Here an example. You wanted to do some analysis job but what you got was an inspection job. While applying for higher studies, the profile built during those three years would have been useful, if you were planning to do the Masters in the same domain, otherwise, start afresh.