What are the differences between Sun Certified Programmer for Java Platform 5 (CX310-055) and 6 (CX-310-065) exams? * Questions concerning System.gc() have been removed. * Coverage of the java.io.Console class has been added. * Coverage of navigable collections has been added. * Several of the previous objectives have been strengthened (so you can expect more questions and more detailed questions on them). These strengthened objectives include: exception handling, collection classes and collection interfaces, assertions, threads, and flow control.