Hii ,

Cracking Any exam in the first attempt purely depends on one's Capability and his knowledge.  As far as I know SBI PO clerk exam Questions are of easy to Moderate level. But the one who can get the Correct Answer in less time wins. The exam is of 60 Mins Duration comprising of 100 Questions. So It is difficult to crack At one time. But can do it in 2 to 3 attempts. If you feel that i have knowledge and time management skill you can clear that.