Can a Byte object be cast to a double value?

No, an object cannot be cast to a primitive value.


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What value does read() return when it has reached the end of a file?

The read() method returns -1 when it has reached the end of a file.


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How are commas used in the intialization and iteration parts of a for statement?

Commas are used to separate multiple statements within the initialization and iteration parts of a for statement.

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What is the advantage of the event-delegation model over the earlier event-inheritance model?

The event-delegation model has two advantages over the event-inheritance model. First, it enables event handling to be handled by objects other than the ones that generate the events (or their containers). This allows a clean separation between a component's design and its use. The other advantage of the event-delegation model is that it performs much better in applications where many events are generated. This performance improvement is due to the fact that the event-delegation model does not have to repeatedly process unhandled events, as is the case of the event-inheritance model.


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What must a class do to implement an interface?

It must provide all of the methods in the interface and identify the interface in its implements clause.


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What is the difference between a break statement and a continue statement?

A break statement results in the termination of the statement to which it applies (switch, for, do, or while). A continue statement is used to end the current loop iteration and return control to the loop statement.


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Can a double value be cast to a byte?

Yes, a double value can be cast to a byte.


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Which Java operator is right associative?

The = operator is right associative.

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What is the argument type of a program's main() method?

A program's main() method takes an argument of the String[] type.


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How many times may an object's finalize() method be invoked by the garbage collector?

An object's finalize() method may only be invoked once by the garbage collector.


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What is the difference between the Boolean & operator and the && operator?

If an expression involving the Boolean & operator is evaluated, both operands are evaluated. Then the & operator is applied to the operand. When an expression involving the && operator is evaluated, the first operand is evaluated. If the first operand returns a value of true then the second operand is evaluated. The && operator is then applied to the first and second operands. If the first operand evaluates to false, the evaluation of the second operand is skipped.

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What is the range of the char type?

The range of the char type is 0 to 2^16 - 1.


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