AP Computer Science Exam

Question:

Consider the following code snippet:

int num = 10;
String str = "Hello";

if (num >= 0) {
    if (str.length() > 5) {
        System.out.println("Condition 1");
    } else {
        System.out.println("Condition 2");
    }
} else if (str.equals("Goodbye")) {
    System.out.println("Condition 3");
} else {
    System.out.println("Condition 4");
}

What will be the output of the above code if it is executed?

A) Condition 1

B) Condition 2

C) Condition 3

D) Condition 4

E) None of the above

Explanation:

The control flow of the code can be analyzed step-by-step:

1. The variable num has a value of 10, which is greater than or equal to 0. So, the code enters the first if statement.

2. Inside the first if statement, the condition str.length() > 5 is checked. The length of the string str is 5, which is not greater than 5. Hence, the code executes the else block and prints "Condition 2".

3. Since the code has executed the else block in the first if statement, it skips the remaining else if and else blocks. Therefore, the output of the code will be "Condition 2".

Hence, the correct answer is B) Condition 2.

Note: It is important to carefully analyze the control flow of the code to determine the correct output.