Monday

Read and solve the exercises found in [arrays](../../topics/03 programflow/array.md)

Peer instruction

Question 1

Which of the following correctly declares and initialises an array?

1. int array[] = {1,2,3,4,5};

2. short array[] = new short[4];

3. char array = {'a', 'b', 'c', 'd', 'e'};

4. double array[] = new double{11.1, 22.2, 33.3};

5. String array[] = new String[]{"Java", "Fortran", "C++"}

Question 2

Which of the following correctly increments all the elements of array

1. for (int i = 0; i < array.length(); i++) array[i]++;

2. for (int i = 0; i < array.length; i++) array[i]++;

3. for (int i = 0; i < array.length; i++) array[i++]++;

4. array[0..array.length]++;

5. array++;

Question 3

What will the value of array be?

public class Test {
    public static void main(String[] args) {
        int[] iArray = {3, 4, 5, 6, 7};
        myMethod(iArray);
    }

    static void myMethod(int a[]) {
        for (int i = 1; i < a.length - 1; i++) {
            a[i] /= 2;
        }
    }
}

1. 3, 4, 5, 6, 7

2. 1, 2, 2, 3, 3

3. 3, 2, 2, 3, 3

4. 1, 2, 2, 3, 7

5. 3, 2, 2, 3, 7