AP Computer Science A Questions and Answers 100% Pass
12 views 0 purchase
Course
AP Computer Science A
Institution
AP Computer Science A
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...
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
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller BrilliantScores. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
