Mock exam from HFSJ is more difficult if you compare it with actual SUN exam because in HFSJ they do not mention how many options to choose for the mock questions. Actual SUN exam is straight forward and it�s not that difficult.
Go with positive mindset, you will get good score. GOOD LUCK for the exam.
SCJP 1.4 | SCWCD 1.4 | SCBCD 1.3 | SCEA Part I - Preparing...
What's important is knowing why you missed certain questions in the HF mock. Make sure you understand where you went wrong the first time, and if you have mastered the concept, you should do well in the exam.