Hello,

You have tagged NDA exam. So , I am writing the answer in the same context.

During the application for NDA/NA Written Exam, you can give your preference for the city in which you wish to appear for the exam.

The allotment will be done on first come first serve basis.

The exam center will be intimated to the candidate through the Admit Card. The complete address also will be mentioned.

Hope this helps.
Thanks.