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50. What is the immediate superclass of Menu?
MenuItem

51. What is the purpose of finalization?
The purpose of finalization is to give an unreachable object the opportunity to perform any
cleanup processing before the object is garbage collected.

52. Which class is the immediate superclass of the MenuComponent class.
Object

53. What invokes a thread's run() method?
After a thread is started, via its start() method or that of the Thread class, the JVM invokes the
thread's run() method when the thread is initially executed.

54. 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.

55. Name three subclasses of the Component class.
Box.Filler, Button, Canvas, Checkbox, Choice, Container, Label, List, Scrollbar, or
TextComponent

56. What is the GregorianCalendar class?
The GregorianCalendar provides support for traditional Western calendars.