Yousufzi, if you prepare ALL the topics thoroughly, you would be able to attempt the mcqs with ease. That is the only key, not just for psychology but for all subjects. In psychology accomplishing this is easier because the course is not that lenghthy compared to many other subjects.

PS: my original account was banned for voicing an unorthodox opinion on Islamiat forum. apparently we are a very tolerant nation, and our capacity to digest dissent is enviable !