This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
That means special features of the language such as autoboxing will not be present and so wrapper objects like Boolean can not be assigned primitive values such as 'true'.
You need to decide which certification you'd prefer (I can't really see why you'd go for 1.4 when you can do the Java 5 one instead), and then choose mock exams appropriately or ignore questions that aren't compatible between the two exams.