Social problem or Candidate Solution type questions:-

     In these part the interviewer may ask questions such as world issues, national issues and solution for those issues.  Also he checks the depth of knowledge and our approach to the issues.  He asks our views to the issues and solution for the issue.
  Eg:- He asks the candidate that the views of India on terrorism is good or bad, if good why it is good and if bad why  it is bad, then tell you solution like this.

2.  Current Affairs and General Knowledge and issues:-

     He also ask some history and current affairs of the nation and world.

Eg. Tell five things you recently read in newspaper.  Tell deeply about a particular news.

3. Technical questions or Application Knowledge questions:-

     If we go to the TGC entry i.e Technical Graduation Course and TES entry i.e. Technical Entry Scheme they may put forward some basic technical questions relating to our daily day to day life. 

Eg. If we say that we play cricket, he may ask how you will apply physics law to the swing bowling etc.
Also you will apply the phythogores theorem to the table tennis service etc.

If you are from engineering back ground the questions also from,
Basic Network questions
Basic physics laws
All Engineering fundamental questions.

     In these set of questions he find out application knowledge.  i.e. application of our theoretical knowledge in the physical day to day tasks which is essential for the defence  Officers.