This is my first post in coderanch.
I am planning to take OCAJP
7 exam in one month.
Could you please suggest which book to refer?
I have SCJP
6 written by Kathy Sierra and Bert Bates
I am confused between these 2 books, not sure which one to buy
1. OCA/OCP Java
SE 7 Programmer I & II Study Guide (Exams 1Z0-803 & 1Z0-804) (Certification Press) by Kathy Sierra and Bert Bates
2. OCA Java SE 7 Programmer I Certification Guide: Prepare for the 1ZO-803 exam by Mala Gupta
and also is it mandatory to buy a exam voucher from oracle before taking exam?
Thanks in advance :-)