Java认证模拟题及分析1

文章作者 100test 发表时间 2007:03:14 17:34:20
来源 100Test.Com百考试题网

question 1)
which of the following lines will compile without warning or error.
1) float f=1.3.
2) char c=a.
3) byte b=257.
4) boolean b=null.
5) int i=10.

answer to question 1

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question 2)
what will happen if you try to compile and run the following code
public class myclass {
public static void main(string arguments[]) {
amethod(arguments).
}
public void amethod(string[] arguments) {
system.out.println(arguments).
system.out.println(arguments[1]).
}
}
1) error can´.t make static reference to void amethod.
2) error method main not correct
3) error array must include parameter
4) amethod must be declared with string
answer to question 2

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question 3)
which of the following will compile without error
1)
import java.awt.*.
package mypackage.
class myclass {}
2)
package mypackage.
import java.awt.*.
class myclass{}
3)
/*this is a comment */
package mypackage.
import java.awt.*.
class myclass{}
answer to question 3

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question 4)
a byte can be of what size
1) -128 to 127
2) (-2 power 8 )-1 to 2 power 8
3) -255 to 256
4)depends on the particular implementation of the java virtual machine
answer to question 4

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question 5)
what will be printed out if this code is run with the following command line?
java myprog good morning
public class myprog{
public static void main(string argv[])
{
system.out.println(argv[2])
}
}
1) myprog
2) good
3) morning
4) exception raised: java.lang.arrayindexoutofboundsexception: 2

answer to question 5

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question 6)
which of the following are keywords or reserved words in java?
1) if
2) then
3) goto
4) while