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AP Computer Science A Questions and Answers 100% Pass
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AP Computer Science A Questions and Answers 100% Pass Consider the following code segment: ```java int[] numbers = {1, 2, 3, 4, 5}; int sum = 0; for (int i = 0; i < h; i++) { sum += numbers[i]; } ``` What does the code segment do? The code segment calculates the sum of all th...

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  • August 28, 2024
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  • 2024/2025
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AP Computer Science A Questions and
Answers 100% Pass
Consider the following code segment:

```java

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

int sum = 0;

for (int i = 0; i < numbers.length; i++) {

sum += numbers[i];

}

```

What does the code segment do?




✔✔ The code segment calculates the sum of all the elements in the `numbers` array and stores

the result in the `sum` variable. The final value of `sum` will be 15.




Consider the following code segment:

```java

String str = "hello";


1

,str = str.toUpperCase();

```

What will be the value of `str` after this code executes?




✔✔ The value of `str` will be `"HELLO"` after the code executes because the `toUpperCase()`

method converts all characters in the string to uppercase.




Consider the following code segment:

```java

int x = 5;

while (x > 0) {

System.out.println(x);

x--;

}

```

What does this loop print?




✔✔ This loop prints the numbers 5, 4, 3, 2, and 1, each on a new line. The loop continues to

decrement `x` until `x` becomes 0, at which point the loop stops.
2

,Consider the following code segment:

```java

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

System.out.println(arr[5]);

```

What happens when this code is executed?




✔✔ The code throws an `ArrayIndexOutOfBoundsException` because the valid indices for the

array `arr` are 0 to 4, but the code is attempting to access index 5, which is out of bounds.




Consider the following code segment:

```java

String s1 = "abc";

String s2 = "abc";

System.out.println(s1 == s2);

```

What does this code print, and why?



3

, ✔✔ This code prints `true` because string literals in Java that have the same value are interned,

meaning that `s1` and `s2` refer to the same memory location.




Consider the following code segment:

```java

public class Animal {

public void sound() {

System.out.println("Animal sound");

}

}




public class Dog extends Animal {

public void sound() {

System.out.println("Bark");

}

}




4

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