Hi,
See
http://www.sun.com/training/catalog/courses/CX-310-055.xml It Says:
Delivered at: Authorized Worldwide Prometric
Testing Centers
Prerequisites: None
Other exams/assignments required for this certification: None
Exam type: Multiple choice and drag and drop
Number of questions: 72
Pass score: 59% (43 of 72 questions)
Time limit: 175 minutes
As part of our exam refresh process, SUN occasionally tests new questions on the live exam forms. These questions are tested to understand their statistical properties and will not be counted as part of your final score. There are 10 unscored questions in this exam. Forty extra minutes have been added to your exam duration to allow you ample time to answer all questions.