Review Questions

Which of the following expressions evaluates to true?

Select the two correct answers.

Which statements are true?

Select the two correct answers.

Which statements are true about the lines of output printed by the following program?

public class BoolOp {
    static void op(boolean a, boolean b) {
        boolean c = a != b;
        boolean d = a ^ b;
        boolean e = c == d;
        System.out.println(e);
    }

    public static void main(String[] args) {
        op(false, false);
        op(true, false);
        op(false, true);
        op(true, true);
    }
}

Select the three correct answers.

What happens during execution of the following program?

public class OperandOrder {
    public static void main(String[] args) {
        int i = 0;
        int[] a = {3,6};
        a[i] = i = 9;
        System.out.println(i + " " + a[0] + " " + a[1]);
    }
}

Select the one correct answer.

Which statements are true about the output of the following program?

public class Logic {
    public static void main(String[] args) {
        int i = 0;
        int j = 0;

        boolean t = true;
        boolean r;

        r = (t &  0<(i+=1));
        r = (t && 0<(i+=2));
        r = (t |  0<(j+=1));
        r = (t || 0<(j+=2));
        System.out.println(i + " " + j);
    }
}

Select the two correct answers.