Government & Defence Entrance Exam

Yes, you can now. Wait for the vacancies to be announced and fill up the application when the date arrives.

What are you pursuing currently and what you want to pursue? What is your last qualification? Add these details to get a correct response.

NDA is given by 12th passes candidates only. If you completed college, then you can appear for CDSE. The training through NDA is 4 years and through CDSE is 1.6 years.

LDC stands for Lower Division Clerk. You can be appointed clerk in any department where seats are available. You could be placed in a Government college or Railways. But banks conduct their own exams.

You are eligible for both. If you are in 3rd year of B.Tech, then I suggest applying for UES for Army. For DGCA, apply after completing your graduation.

Yes. Students of a category compete among themselves. They are selected on the basis of their category rank.

Are you talking about Amity University?
http://www.amity.edu/Bihar/amity-Patna.aspx
If it is what is in the link, then it is not fake. You will be eligible for all graduate based exams.

NCC would be helpful for Police. NSS is just for name sake. Also, Income Tax recruitment is done mostly through SSC Exam.

There are some vacancies that are solely released for O level certificate holders. Keep an eye out for them. Also, some jobs give preference to O level holders like UPP, UPSRTC, etc.

Managing both will be hard. Since you are pursuing Honors, you will require proper time management. You can start by studying newspaper daily and Studying General Science. Read the Newspaper thoroughly in morning and Study GS in evening. When you get holidays, pickup a topic from history or civics and finish it on the same day.