Engineering Entrance Exam

It depends on you but as the topics are all new in B.Tech. if you study a topic before a lecture then you will definitely have interest in the lecture and will not get bored. In this way, you will easily be able to get good marks. In B.Tech an hour of lecture has more importance than self-study even for longer hours as you will be able to clear your concepts easily during your lectures.

No it's not same. GRE is the test of your basic mathematics, aptitude and English language however GATE is totally a test of your engineering subjects along with 15% aptitude and English.

For cracking GATE exam, brush up the 8 core subjects of CSE and of course your aptitude. You will get through it.

B.Tech EEE students are eligible to appear for GATE to seeking admission in M.Tech Aerospace engineering.

Yes, I think that it would very useful if you solve old year's IIT papers. But, I also think that you should try some other questions which are related with your topics. You should also solve other entrance exams papers. It will be very useful to know which types of questions are asked in the entrance exam.
Best of luck.

The cut off will be decided after the examination of JEE. You need above 65%.

For any NIT, you required above 180 marks in JEE mains.
Best of luck.

According to the percentage criteria (min. 75%), you are not eligible but if your percentage lie in the top 20 percentile of your state board, you are eligible.

The exact dates are still not out , for tentative dates check link below :
http://www.99admissions.in/jee-main-2017-dates-application-form-eligibility-pattern-2/
You can apply online or through offline mode.

Kindly follow the link below:
http://viteee2017.in/see-viteee-2017-preparation-books-here/