Review Questions

What will be the result of attempting to compile and run the following code?

class MyClass {
    public static void main(String[] args) {
        boolean b = false;
        int i = 1;
        do {
            i++;
            b = ! b;
        } while (b);
        System.out.println(i);
    }
}

Select the one correct answer.

What will be the output when running the following program?

public class MyClass {
    public static void main(String[] args) {
        int i=0;
        int j;
        for (j=0; j<10; ++j) { i++; }
        System.out.println(i + " " + j);
    }
}

Select the two correct answers.

Which one of these for statements is valid?

Select the one correct answer.

What will be the result of attempting to compile and run the following program?

class MyClass {
    public static void main(String[] args) {
        int i = 0;
        for (   ; i<10; i++) ;      // (1)
        for (i=0;     ; i++) break; // (2)
        for (i=0; i<10;    ) i++;   // (3)
        for (   ;     ;    ) ;      // (4)
    }
}

Select the one correct answer.

Which statements are valid when occurring on their own?>

Select the three correct answers.

Given the following code fragment, which of the following lines will be a part of the output?

outer:
for (int i = 0; i < 3; i++) {
    for (int j = 0; j < 2; j++) {
        if (i == j) {
            continue outer;
        }
        System.out.println("i=" + i + ", j=" + j);
    }
}

Select the two correct answers.

What will be the result of attempting to compile and run the following code?

class MyClass {
    public static void main(String[] args) {
        for (int i = 0; i<10; i++) {
            switch(i) {
                case 0:
                    System.out.println(i);
            }
            if (i) {
                System.out.println(i);
            }
        }
    }
}

Select the one correct answer.

Which of the following implementations of a max() method will correctly return the largest value?

// (1)
int max(int x, int y) {
    return (if (x > y) { x; } else { y; });
}
// (2)
int max(int x, int y) {
    return (if (x > y) { return x; } else { return y; });
}
// (3)
int max(int x, int y) {
    switch (x < y) {
        case true:
            return y;
        default:
            return x;
    };
}
// (4)
int max(int x, int y) {
    if (x>y) return x;
    return y;
}

Select the one correct answer.

Given the following code, which statement is true?

class MyClass {
    public static void main(String[] args) {
        int k=0;
        int l=0;
        for (int i=0; i <= 3; i++) {
            k++;
            if (i == 2) break;
            l++;
        }
        System.out.println(k + ", " + l);
    }
}

Select the one correct answer.

Which statements are true?

Select the two correct answers.