The questions asked in SBI clerk are from topics relating to quantitative aptitude which includes maths of class 10th level. Logical reasoning includes verbal and non verbal. Marketing which includes banking and marketing concepts. Computers which includes hardware and software information. Current affairs which includes current event and general awareness and English which includes skills of reading and writing.

You can sample papers for SBI clerk on various sites online.

Give online tests as well to know your strong and weak areas and analyse the weak areas to improve them timely.

Good Luck.