JAVA题库:格林模拟试题三（上）(1)

文章作者 100test 发表时间 2007:03:14 17:04:44
来源 100Test.Com百考试题网

questions

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question 1)

which of the following are legal statements?

1) float f=1/3.
2) int i=1/3.
3) float f=1.01.
4) double d=999d.

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question 2)

which of the following are java keywords?

1) null
2) new
3) instanceof
4) wend

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question 3)

which of the following are valid statements?

1) system.out.println(1 1).
2) int i=2 2.
3) string s="on" one.
4) byte b=255.

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question 4)

which of the following statements are true?

1) the garbage collection algorithm in java is vendor implemented
2) the size of primitives is platform dependent
3) the default type for a numerical literal with decimal component is a float.
4) you can modify the value in an instance of the integer class with the setvalue method

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question 5)

which of the following are true statements?

1) i/o in java can only be performed using the listener classes
2) the randomaccessfile class allows you to move directly to any point a file.
3) the creation of a named instance of the file class creates a matching file in the underlying operating system only when the close method is called.
4) the characteristics of an instance of the file class such as the directory separator, depend on the current underlying operating system