The exam consists of five areas which also relate the five project management process:
Initiating the project-13%
Planning the Project- 24%
Executing the Project- 30%
Monitoring and Controlling the Project- 25%
Closing the Project- 8%
Looking at the percentage, you should really focus on the Executing and Monitoring and Controlling of the project since that has the highest percentile.
There are a total of 175 scored questions and 25 un-scored (pretest) question. The pretest questions are basically questions that they want to test out for future exams.