I would recommend getting what if often referred to as the "K&B" book for 1.4 exam. This is: "Sun Certified Programmer & Developer for
Java 2 Study Guide Exams 310-035 & 310-027" by Kathy Sierra and Bert Bates.
It will explain the topics needed to pass the exam. Not sure about your first question but K&B mention you do need to know about Wrapper methods you mentioned.
Taking the mock exams helps. Search this forum for mock exams and the FAQ to find them.
[ October 30, 2005: Message edited by: Ray Horn ]
[ October 30, 2005: Message edited by: Ray Horn ]
[ October 30, 2005: Message edited by: Ray Horn ]