Quiz: Java Methods

5 questionsNo time limitPass: 60%+10 XP on first pass

Write static methods, pass parameters, return values, overload methods, use varargs and recursion — and understand Java's pass-by-value with objects.

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Question 1

What does this print?

public class Main {
    static void inc(int x) { x++; }
    public static void main(String[] args) {
        int a = 5;
        inc(a);
        System.out.println(a);
    }
}

560Error

Question 2
Which pair is valid overloading?
int f(int a) and double f(int a)int f(int a) and int f(int a, int b)void f(int a) and void f(int b)int f(int a) and int F(int a)

Question 3

What does this print?

public class Main {
    static void fill(int[] a) { a[0] = 42; }
    public static void main(String[] args) {
        int[] arr = new int[2];
        fill(arr);
        System.out.println(arr[0]);
    }
}

042nullError

Question 4
Is Java pass-by-reference?
Yes, for objectsYes, alwaysNo — it is always pass-by-value (object references are passed by value)Only for arrays
Question 5
What does sum(int... nums) receive as nums when called as sum(1, 2, 3)?
three separate intsan int array {1, 2, 3}a List<Integer>the number 6