Last year i took cat coaching now is it necessary to take bank PO coaching, can i prepare for it at home?

Hi, Coaching is generally the same. You can probably use the same study material and wok harder with loads of practice . Books that you can refer- Guide To Banking General Awareness & Banking Aptitude Test by Rph Editorial Board Objective Computer Awareness: For General Competitive Exams by R Pil

Yes, You can PO is lil bit less than CAT, Concentrate on Maths, reasoning and English with current affairs too.Most important you should join some test series it is more beneficial for you.