A final class can be extended. true false the set of all instances of a subclass

Question

A final class can be extended. true false the set of all instances of a subclass is a subset of the instances of its superclass. true false Normally you depend on the JVM to perform garbage collection automatically. However, you can explicitly use to request garbage collection. System.exit(0) System.gc() System.gc(0) System.exit() You cannot place a method call in a try-catch block unless the method claims an exception. true false the presence of the try-catch block imposes overhead when no exception occurs. true false You must place a method call in a try-catch block if the method claims an exception. false true The methods getMessage(), printStackTrace(), and toString() are available in class. Throwable Exception IOException RuntimeException

Explanation / Answer

27.false

You can't extend a class that is stated final. But you can create an intermediate class, named Wrapper. This Wrapper will essentially have an instance of the unique class and give alternative techniques to adjust the state of the object according what you desire to do.

30.False

31.False

32. True

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