JAVA题库:格林模拟试题一（上）

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; 

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

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{}

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

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