I used 3 steps during passing exam:
1 step - 30 min to go through exam by answering the easiest questions. (during this step my brain started to work) don't spend more than 30 sec - 1 min per question.
2 step - 1h 30 min to answer the remaining questions WITHOUT drag/drop and also checked the the easiest questions.
3 step - 45m - 1h to answer all drag/drop. And also didn't forget about bug when go through drag/drop. Explanation about this awful bug I've found on this forum.
Tried these steps on examlabs many times before real exam.
OCPJP -100% OCPWCD - 98% OCPJWSD - 100% OCEJPAD - 91% Thanks to this forum!!!