Question

1. Consider the following two methods:

public static boolean isTrue(int n){

       if(n%2 == 0)

          return true;

       else

          return false;

}

public static int Method(int[] numbers, int startIndex) {

if(startIndex >= numbers.length)

       return 0;

if (isTrue(numbers[startIndex]))

     return 1 + Method(numbers, startIndex + 1);

else

     return Method(numbers, startIndex + 1);

}

What is the final return value of Method() if it is called with the following parameters: numbers = {1, 2, 2, 3, 3, 4, 4, 4, 5, 5}, startIndex = 0

Answer:

Answer 1

//TestCode.java
public class TestCode {
    public static boolean isTrue(int n){
        if(n%2 == 0)
            return true;
        else
            return false;
    }

    public static int Method(int[] numbers, int startIndex) {
        if(startIndex >= numbers.length)
            return 0;
        if (isTrue(numbers[startIndex]))
            return 1 + Method(numbers, startIndex + 1);
        else
            return Method(numbers, startIndex + 1);
    }

    public static void main(String[] args)
    {
        int[] numbers = {1, 2, 2, 3, 3, 4, 4, 4, 5, 5};
        int startIndex = 0;

        System.out.println(Method(numbers,startIndex));
    }
}

5