You need to finish three sections of SBI PO Prelims within 60 minutes, which means you need speed with accuracy in order to attempt 100 questions in total. The more you practice, the better chances you have of acing this exam.
Make mathematics and reasoning your strong subjects, practice questions to solve them within time to increase efficiency. You should lay emphasis not on mugging up the formulas but instead try understanding the concepts, so, you can modify the formulas according to the question requirement.
Remember negative marking is a factor here. Therefore, try not to attempt questions that put you in doubt. Although, the prelim exam will be of just qualifying nature and won’t be considered for the final merit list as only Main exam marks will matter, but you still need to secure the minimum qualifying marks in the prelims as set by the Indian Bank.
Manage your time properly; give appropriate amount of time to each section. Try to improve your time by practicing as many online tests as possible