Interface

Composition

Aggregation

Encapsulation, Abstraction, Inheritance, Polymorphism

Encapsulation is the method of converting a class into an interface.

Encapsulation refers to the inheritance of properties from a parent class.

Encapsulation is the process of creating multiple instances of a class.

Encapsulation is the bundling of data and methods that operate on that data, restricting direct access to some of the object's components.

Inheritance in Java allows a subclass to inherit properties and methods from a superclass, promoting code reusability.

Inheritance can only occur between classes in the same package.

Inheritance in Java requires all classes to be abstract.

Inheritance allows a subclass to override methods only.

Polymorphism can only be implemented using abstract classes in Java.

Polymorphism is a feature exclusive to C++ and not applicable in Java.

Polymorphism is only achieved through inheritance in Java.

Polymorphism in Java is implemented through method overriding and interfaces.

Abstraction is the process of simplifying complex systems by modeling classes based on essential properties and behaviors while hiding unnecessary details.

Abstraction is the process of creating multiple instances of a class.

Abstraction involves exposing all details of a system to the user.

Abstraction is the method of combining all properties and behaviors into a single class.

A class in Java is a type of variable.

A class in Java is a method for executing code.

A class in Java is a collection of data types.

A class in Java is a blueprint for creating objects that defines properties and behaviors.

An object is a static data type in Java.

An object is a method that performs actions.

An object in Java is an instance of a class that contains state and behavior.

A class is a blueprint for creating objects.

public ClassName { // constructor body }

public void ClassName() { // constructor body }

class ClassName() { // constructor body }

public ClassName() { // constructor body }

Method overloading allows different classes to have the same method name.

Method overriding is when a method is called with different return types.

Method overloading requires the same number of parameters in both methods.

Method overloading is for the same class with different parameters; method overriding is for subclasses redefining superclass methods.

Interfaces in Java are used to create objects directly without any class.

An interface in Java is a contract that classes can implement, defining method signatures without implementations.

An interface in Java is a way to define variables and constants only.

An interface in Java is a type of class that can contain method implementations.

The 'super' keyword is used to access superclass methods and constructors.

The 'super' keyword is used to define interfaces.

The 'super' keyword is used to declare variables.

The 'super' keyword is used to create new classes.

Use interfaces to achieve multiple inheritance in Java.

Implement multiple constructors in a class.

Use abstract classes for multiple inheritance.

Extend multiple classes directly in Java.

The 'this' keyword is used to declare a new class.

The 'this' keyword refers to a static method.

The 'this' keyword refers to the current instance of a class.

The 'this' keyword is a type of variable in Java.

A static method can only be called from an instance of the class.

A static method is a method that can only be used in the main method.

A static method in Java is a method that belongs to the class and can be called without creating an instance of the class.

A static method cannot access static variables.

Use private fields and public getter/setter methods.

Use static methods for data access.

Implement inheritance instead.

Use public fields only.

An interface can maintain state, while an abstract class cannot.

An abstract class cannot have any methods, while an interface can have multiple implementations.

An abstract class can only be instantiated once, while an interface can be instantiated multiple times.

An abstract class can have implemented methods and state, while an interface cannot have implemented methods (except default methods) and cannot maintain state.

A package in Java is a user interface design tool.

A package in Java is a namespace that groups related classes and interfaces.

A package in Java is a method for data encryption.

A package in Java is a type of variable.

Use if-else statements to handle exceptions in Java.

Use try-catch blocks to handle exceptions in Java.

Throw exceptions without catching them.

Ignore exceptions and continue execution.

The 'final' keyword allows a variable to be reassigned.

The 'final' keyword is used to declare abstract classes.

The 'final' keyword enables multiple inheritance in Java.

The 'final' keyword in Java signifies that a variable's value cannot be changed, a method cannot be overridden, and a class cannot be subclassed.