JAVA题库:格林模拟试题一（上）

Question 26)

If you run the code below, what gets printed out?

String s=new String("Bicycle");


int iBegin=1;


char iEnd=3;


System.out.println(s.substring(iBegin,iEnd));

1) Bic

2) ic

3) icy

4) error: no method matching substring(int,char)

Question 27)

If you wanted to find out where the position of the letter v (ie return 2) in the string s containing "Java",which of the following could you use?

1) mid(2,s);

2) charAt(2);

3) s.indexOf('v');

4) indexOf(s,'v');

Question 28)

Given the following declarations

String s1=new String("Hello")


String s2=new String("there");


String s3=new String();

Which of the following are legal operations?

1) s3=s1 + s2;

2) s3=s1-s2;

3) s3=s1 & s2;

4) s3=s1 && s2

Question 29)

What is the result of the following operation?

System.out.println(4 | 3);

1) 6

2) 0

3) 1

4) 7

Question 30)

public class MyClass1 {


public static void main(String argv[]){ }


/*Modifier at XX */ class MyInner {}


}

What modifiers would be legal at XX in the above code?

1) public

2) private

3) static

4) friend