Programming Fundamentals Quiz

Loops

• For Loop is popular for having all the components in one line.
• While Loop checks the condition first before doing the statements.

Object-Oriented Programming (OOP) Concepts

• Polymorphism involves defining multiple methods with the same name but different parameter lists.
• Encapsulation bundles data and methods that operate on the data into a single unit.
• Inheritance has a base class and subclass, creating a chain of inheritance.

Variables and Methods

• 'super' is the keyword used to reference a variable that is used to refer to the parent class when working with objects.
• 'this' is used to reference the current object.
• 'new' is the keyword used to instantiate objects.
• A setter method is used to initialize objects of a class, and the correct way to create a setter method is public void setName(String name) { this.name = name; }.

Arrays and Collections

• The value at index 2 in the given array code String names = {"Jordan", "Curry", "Lebron", "Kobe"}; is Lebron.
• The correct way to declare an ArrayList of integers in Java is ArrayList numbers = new ArrayList();.

Access Modifiers

• private is the most restricted type of access modifier.

Input/Output

• The java.util.Scanner library is used to create an object that will let you input a value from the keyboard.

Constructors and Method Signatures

• A constructor refers to a special method used to initialize objects of a class.
• The method signature refers to the name and parameter list of a method.

Inheritance and Subclassing

• The keyword extends is used in inheritance.
• The final keyword is used to prevent a class from being subclassed.

Generics and Interfaces

• Using Generics, it is not possible to create a single class that works with a specific data type.
• The correct way to properly connect an interface named Assessment from a class is public class Assessment implements Compute{ }.
• The correct way to create a bounded type generic class is public class Box.

Exception Handling

• The purpose of the try-catch block in Java is to handle exceptions that may occur within a block of code.