What is an arraylist - Study guides, Class notes & Summaries

AP Computer Science - Chapter 2 Review Questions with Verified Solutions Which of the following data types is used to store a single character in Java? A) `String` B) `int` C) `char` D) `boolean` Answer: C) char What will be the result of the following code snippet? ```java int a = 10; int b = 3; int result = a / b; 2 Sln(result); ``` A) `3.33` B) `3` C) `10` D) `0` Answer: B) 3 How do you declare an `ArrayList` of `Integer` objects in Java? A) `A...

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` ...

All classes implement an abstract data type. - ANSWERFalse In a single statement, define and initialize a reference variable for an ArrayList named frameScores that stores items of type Integer. - ANSWERArrayList frameScores = new ArrayList(); Given: ArrayList itemsList = new ArrayList(); What is the initial size of the ArrayList? - ANSWER0; Zero The _________ operator is used to explicitly allocate an object. - ANSWERnew Given: Employee clerk1 = new Employee() ;. clerk1 refer to an ...

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...

AP Computer Science A Premium, 12th Edition: Prep Book with 6 Practice Tests + Comprehensive Review + Online Practice (Barron's AP Prep) 2024 with complete solution Barron’s AP Computer Science A Premium, 12th Edition includes in‑depth content review and practice. It’s the only book you’ll need to be prepared for exam day. Written by Experienced Educators Learn from Barron’s‑‑all content is written and reviewed by AP experts Build your understanding with comprehensive re...

AP Computer Science Principles Chapter 2 Graded A+ What is the output of this code snippet? ```java int a = 5; int b = 3; Sln(a - b); ``` The output is `2`. How do you call a method named `calculate` from an object `calc`? Use `late();`. What happens if you don’t provide a constructor in a class? 2 Java provides a default constructor that initializes objects with default values. How can you access a private field in a class? Use a public getter method d...

What is the difference between an Interface and an Abstract class? ~ "An abstract class can have instance methods that implement a default behavior. An Interface can only declare constants and instance methods, but cannot implement default behavior and all methods are implicitly abstract. An interface has all public members and no implementation. An abstract class is a class which may have the usual flavors of class members (private, protected, etc.), but has some abstract methods." ...

Name Answer Is the new operator required for Strings? no, it's optional In a string, When does + concat and when does it perform add If either operand involved in the + expression is a String, concatenation is used; otherwise, addition is used. What are 13 methods of the String class? cceeeilrsstttcharAt(),concat(),endsWith(), equals(), equalsIgnoreCase(), indexOf(),length(), replace(), startsWith(), substring(), toLowerCase(), toUpperCase(), andtrim() What are 10 methods of the Str...

Game Design Final Exam Questions with Verified Solutions A programming language is a formal computer language that is used to communicate instructions to a computing device in order to control the computer's behavior in some way. True A number of elements in a specific order is: an array A function that contains arithmetic symbols (e.g. +, <, =/) is an operator. True An instance is: a single occurence A collision volume is called: a region Which of the following is NOT...

What is it called when a programmer uses a parameter (instead of an actual data type) when creating an object of a class or invoking a method? Such definitions are called generics How many parameter types can be used when defining a class? Can they be different? A type parameter can have any reference type (i.e., any class type) plugged in for the type parameter What are the restrictions on parameter types? (Can they be classes, interfaces, arrays, primitives, exceptions, nodes, etc.) How ar...