Ap computer science 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 Exam Questions and Answers 100% Pass What is the purpose of using loops in programming? Loops allow repeated execution of a block of code until a specified condition is met, making programs more efficient by automating repetitive tasks. How do arrays help in managing data in a program? Arrays help manage data by storing multiple values of the same type in a single, ordered collection. They allow easy access to and manipulation of data using indices. What...

AP Computer Science Final Exam with Verified Solutions In Java, a method can have the same name as another method in the same class if their parameter lists are different. True The private access modifier allows a class member to be accessed only within the same package. False In Java, a String is a mutable object. False Java supports multiple inheritance directly through classes. False 2 The super keyword in Java is used to refer to the parent classs method...

AP Computer Science Principles Vocabulary 100% Correct What is algorithm in computer science? An algorithm is a step-by-step procedure or formula for solving a problem or performing a task. It is a set of instructions designed to be followed in a specific order to achieve a desired outcome. Define abstraction and its role in programming. Abstraction is the process of simplifying complex systems by focusing on the essential features and ignoring the details. In programming, it h...

AP Computer Science Multiple Choice with Complete Solutions What will be the output of the following code snippet if `x = 7` and `y = 3`? ```java int result = x / y; Sln(result); ``` `2` - `2.0` - `3` - `2.333` Which of the following statements is used to create a new instance of a class in Java? - `ClassName obj = new ClassName();` - `ClassName obj = ClassName();` 2 - `ClassName obj = new ClassName;` - `new ClassName obj = new ClassName();` `ClassName ob...

AP Computer Science Principles Exam with Verified Solutions What are algorithms, and why are they important in computer science? Algorithms are step-by-step procedures or formulas for solving problems. They are important because they provide a systematic way to solve computational problems and are foundational to programming and problem-solving in computer science. How does abstraction help in programming? Abstraction helps in programming by allowing programmers to manage comp...

AP Computer Science Principles Latest Version 100% Verified What is an algorithm? An algorithm is a step-by-step set of instructions designed to perform a specific task or solve a problem. What is the purpose of a loop in programming? A loop allows a set of instructions to be repeated multiple times until a certain condition is met. What does the term "abstraction" mean in computer science? Abstraction refers to simplifying complex systems by focusing on the main ideas while ...

AP Computer Science Unit 1 Questions and Answers Already Passed What does "print" do in most programming languages? The `print` function outputs text or data to the console or screen. What is the purpose of "return" in a function? The `return` statement sends a value back to the caller of the function and ends its execution. What is an "identifier" in programming? An identifier is a name given to a variable, function, or other entities in a program to reference them. Wha...

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 Principles 100% Correct What is a `list comprehension` in Python, and how is it used? A `list comprehension` in Python is a concise way to create lists using a single line of code. It allows for the generation of lists by applying an expression to each element in an iterable, optionally filtering elements based on a condition. How does a `recursive` function work, and what is its purpose? A `recursive` function is a function that calls itself to solve a pro...