單項(xiàng)選擇題

What is the result？（）

A.420 is the output.
B.An exception is thrown at runtime.
C.All constructors must be declared public.
D.Constructors CANNOT use the private modifier.
E.Constructors CANNOT use the protected modifier.

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多項(xiàng)選擇題

A company has a business application that provides its users with many different reports： receivables reports， payables reports， revenue projects， and so on.The company has just purchased some new， state-of-the-art，wireless printers， and a programmer has been assigned the task of enhancing all of the reports to use not only the company’s old printers， but the new wireless printers as well.When the programmer starts looking into the application， the programmer discovers that because of the design of the application， it is necessary to make changes to each report to support the new printers.
Which two design concepts most likely explain the situation？（）

A.Inheritance
B.Low cohesion
C.Tight coupling
D.High cohesion
E.Loose coupling
F.Object immutablility

單項(xiàng)選擇題

What is the result？（）

A.Compilation fails.
B.An exception is thrown at runtime.
C.doStuff x=6，main x=6
D.doStuff x=5，main x=5
E.doStuff x=5，main x=6
F.doStuff x=6，main x=5

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What is the result？（）

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What is the result？（）

What is the result？（）

What is the result？（）