Airport authority of india (AAI) ATC and electronics Guide with practice previous papers

All most all candidates are interested to get a job in Government sector, but due to the lack of knowledge on the entrance exams pattern and preparation,they are wasting their time on preparing all the subjects and being confused in the exam, so, before preparing for any competitive exams, you must know the exam pattern,syllabus and if possible get some previous papers and decide your self which subject has to skip.