Hello Pooja, Sort out the concepts mentioned in RS AGARWAL aptitude book and start practicing one by one. If u go through the problem atleast once then u can get a glimpse on it. Try INDIABIX website and start solving the questions given on that website topic-wise. Definitely you will succeed in some way. While coming to the TECHNICAL ROUND it is based purely on your core branch. Remember one thing, get your own view on each topic of your core branch topics in such a way that u can face the questions interviewers don't check exact definitions. All the best !!

Buy a book name rs aggarwal or you should try ncert books from class 8thonwardss. The rs aggarwal is the master of all as it holds all the topics under one you should go for that book which is not much hefty.it has important formulas and practice set in the beginning of the topic later it has questions from various gov and private entrance. So you must reply on rs aggarwal for aptitude. Don't just buy book but also study and practice more and more and I know you will...!