The aptitude test consists about roughly 70+ questions covering quantitative, reasoning, verbal and technical. Each question in quantitative and verbal has a time limit of 45 seconds. And for technical questions it is 1 minute. The questions in quantitative and reasoning are straight forward but needs quite a number of calculations. Verbal is moderately tough. Technical questions are asked from a wide range of topics covering almost everything you must have studied. The technical paper is the toughest. The aptitude test is given considerable weightage so every mark you can squeeze is very essential.
The suggestion is to search the requirement and prepare yourself accordingly.Try to solve the mock papers and the previous year papers as many as you can.Read different objective questions.Practice the calculations to make them easier for you at the time of test.