Since there is a huge difference between SCJP 1.4 and SCJP 1.6, solving SCJP 1.4 mock exams is a waste of the time.
You should go for SCJP 1.5 or SCJP 1.6 mock exams. We have a list of
ScjpMockTests, which includes both free and commercial mock exams. You can find both 1.5 and 1.6 versions there.
Moving this to SCJP forum.