OCA Java SE 8 Mock Exam Review - OCA Mock Question 33








Question

What is the output of the following code? 

public class Main {
  public static void main(String args[]) {
    int s = 10;
    anotherMethod(s);
    System.out.println(s);
    someMethod(s);
    System.out.println(s);
  }

  static void someMethod(int val) {
    ++val;
    System.out.println(val);
  }

  static void anotherMethod(int val) {
    val = 20;
    System.out.println(val);
  }
}

    a   20 
        10 
        11 
        11 

    b   20 
        20 
        11 
        10 

    c   20 
        10 
        11 
        10 

    d  Compilation error




Answer



C

Note

When primitive data types are passed to a method, the values of the variables in the calling method remain the same. 

public class Main {
  public static void main(String args[]) {
    int s = 10;/*w  w w  .  j  a  va 2 s .c o m*/
    anotherMethod(s);
    System.out.println(s);
    someMethod(s);
    System.out.println(s);
  }

  static void someMethod(int val) {
    ++val;
    System.out.println(val);
  }

  static void anotherMethod(int val) {
    val = 20;
    System.out.println(val);
  }
}

The code above generates the following result.