When faced with a question like this I recommend that you attempt to compile the code to see what happens. A key way to understand the Java language is to write many many small programs. Also, when selecting mock exams you should expect to not only be given which options are correct but some explanation of why that option is correct. So for this question in my JDK 1.4 database I have included the following explanation (which is visible to anyone who can see the question)...
"An int cannot have a fractional component, under JDK1.4 this produced the error message
possible loss of precision found : double required: int private int iAcres=3.5; "
My JDK1.5/tiger/Java 5 questions also include explanations wherever possible and all code examples have been compiled under JDK1.5. This is important as some questions that are still relevent from the JDK 1.4 objectives now result in different answers, particularly where Autoboxing is a factor.