hey. i am preparing bank and i want some study material of banking awareness, current affairs and computers study. where should i got it.?

You can follow below recommended books

Best Books for General Awareness

-3rd Activity Book by Dreamland
-Business General Awareness by L N Koli
-General Banking and Economic Awareness by Kiran Prakashan
-General awareness basic banking & Financial Issues by Gautam Majumdar
-General awareness Kit by Bright Ps

Best Books for Computer knowledge

-Computer Networks by Andrew S. Tanenbaum
-Computer Architecture by JL Hennessy
-Computer Networking by Keith W. Ross, james F. Kurose
-The art of Computer Programming by Donald E.Knuth
-Computer Fundamentals by Pradeep Sinha, Priti Sinha
-Computer Oranization and design by David A. Patterson, John L.
-The Elements of Computer Systems by Noam Nisan, Shimon, Schocken
-Computer Organization by Carl Hamacher, Zvonko Vranesic, Safwat Zaky
-How to solve it by Computer by R.G Dromey
-Data and Computer Communications by William Stallings

Incase you are asking for books and material to buy then you can refer to sites like CL, refer to paramount material from various online sites like amazon or so. Also you can get the material offline as well. Visit the nearby book store and you can find it there as well.

You can even refer to test series like from testbook site, paramountcoaching and more.

Good luck!!