Ap computer science a - Study guides, Class notes & Summaries

AP CS Principles Diagnostic Questions & Answers How are procedures abstract in computer science? A)They use actual values to represent concepts. B)They represent the lowest level of code for a computer to run. C)They can be used without understanding or seeing the code used. D)They are blocks of code that do something specific. - Correct Ans-C)They can be used without understanding or seeing the code used. What do parameters used in a procedure provide? A)They return calculated values f...

AP Computer Science A 100& Correct What is encapsulation in object-oriented programming? Encapsulation is the concept of bundling data (fields) and methods (functions) that operate on the data into a single unit, typically a class. It helps to protect the internal state of an object and exposes only necessary parts through public methods. What does inheritance allow you to do in Java? Inheritance allows a subclass to inherit fields and methods from a superclass. This promotes co...

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 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"; 2 st...

AP Computer Science A Unit 3 Progress Check: MCQ with Complete Solutions What is a `Boolean expression`? A Boolean expression is an expression that evaluates to either `true` or `false`. Explain the purpose of an `if statement` in programming. An if statement allows a program to execute a block of code only if a specified condition is true. What does the `==` operator check for in Java? The `==` operator checks if two values are equal. How does an `else` statement work ...

AP Computer Science A Unit 2 Progress Check: MCQ Part A 100% Pass What will be the output of the following code? ```java int x = 5; int y = 10; Sln(x + y); ``` A) 15 B) 510 C) 5 D) 10 Answer: A) 15 Given the following code snippet, what is the value of `result` after execution? 2 ```java int a = 8; int b = 3; int result = a % b; ``` A) 2 B) 1 C) 3 D) 5 Answer: A) 2 Which of the following statements correctly initializes an `ArrayList` of `String` ...

AP Computer Science A: Unit 2 Exam with Complete Solutions Consider the following code segment: ```java public class Car { private String model; private int year; public Car(String model, int year) { = model; = year; } public String getModel() { return model; } public int getYear() { 2 return year; } } ``` What is the purpose of the `getModel()` and `getYear()` methods in this class? The `getModel()` and `getYear()` methods are accessor methods (getters)...

AP Computer Science Principles Final/AP Practice Questions with Complete and Verified Solutions How do computer networks facilitate the sharing of information? Computer networks allow multiple devices to connect and communicate, enabling the sharing of resources, data, and information across different locations. What is the significance of data compression in digital communication? Data compression reduces the size of files or data streams, making it faster and more efficient to tran...

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AP Computer Science A Exam Questions and Answers

AP COMPUTER SCIENCE A EXAM 2024/2025 WITH 100% ACCURATE SOLUTIONS

AP Computer Science A - Review 1 Latest Update 100% Pass What is the difference between an `ArrayList` and an array in Java? An `ArrayList` is a resizable data structure that can grow and shrink dynamically, whereas an array has a fixed size. Additionally, `ArrayList` provides methods for manipulating the list, such as adding, removing, and searching for elements. What is inheritance, and how does it work in Java? Inheritance allows a new class (subclass) to inherit properties...