Government & Defence Entrance Exam

Hi,
You can apply for the JAG entry, it is especially for the law students but you must be a graduate in LLB and age limit is 21 to 27 year. If you comply by all these pointers, you are eligible to apply for all three defense services. Top universities for LLB are:
• University, Bangalore (www.nls.ac.in)
• NALSAR University of Law, Hyderabad (www.nalsarlawuniv.org)
• National Law University, Jodhpur, (www.nlujodhpur.ac.in)
• Campus Law Center, Delhi (www.upes.ac.in)
• UPES, Dehradun (www.upes.ac.in)

Yes, you can definitely join Indian air force after completing degree in mechanical engineering. Top colleges of aeronautical engineering in India are:
1. Indian Institute of Aeronautical Engineering, Dehradun
2. Indian Institute of Space Science and Technology, Thiruvananthapuram
3. PEC University of Technology, Chandigarh
4. Sathyabama University, Chennai
5. UPES, Dehradun

Yes, you can start preparing for BPSC. Follow the website of BPSC to know more details about selection, papers and procedures/preparation. You can select papers or your subjects on the basis of your interest and inclination.

Even with a B.Tech, you can put yourself into the military track.

You need to pursue DEEE or B.Tech.

First, refer to the NCERT textbooks. After that, join a good coaching institute.

Yes, any graduate can give UPSC or SSC exam. IES (Indian Engineering Services) can be given by B.Tech students only and IES (Indian Economics Service) is for economics passout. You have to once check for the eligibility of IES. SSC can be given by anyone.