Finally, I have passed the first paper at first attempt. After spending a month on reading the book for preparing the exam, I realized that the book is just enough for passing but not enough for scoring the exam with flying colors. In the exam, I found there many questions that aren't covered in the book but it's the cheapest way to score the paper.
The book cost RM150 and the training cost RM5k. Even I failed and retake the exam again, I still saved some money. Beside, the score will not be printed in the certification. *phew* :D
Now, moving forward to the next paper before I get the OCA (Oracle Certified Associate) Certification, where I can get those books?