just to let you know -- I originally purchased a voucher for the 310-025 exam and was able to use it for the 310-035 exam.
I also used the 1st edition of Khalid/Mughal's book -- basically if you want to take the 1.4 exam (310-035) just skip the chapters on AWT and IO and study up on assertions.
Here's some good posts about Assertions:
study material about ASSERTIONS? Notes on Assertions enjoy!