Hi 

The test will consists of go , appitude , verbal reasoning and technical where technical is the most significant weapon to crack the exam .

So improve your gk knowledge read daily newspaper and watch news which have updated info .

Learn English newspaper daily and learn new hards .

Practise appitude test withing time period limits .tryto learn tricks and shortcuts.

Starting off preparation will be better with previous year question paper of drdo cuz it gives you idea about syllabus and level of qustions

Thanks