OOP

Question 1

Abstract classes are classes that contain one or more abstract methods. An abstract method is a method that is declared, but contains no implementation. Abstract classes may not be instantiated, and require subclasses to provide implementations for the abstract methods.

Answer 1

abstract class

Question 2

package

Answer 2

A package is a namespace for organizing classes and interfaces in a logical manner. Placing your code into packages makes large software projects easier to manage. This section explains why this is useful, and introduces you to the Application Programming Interface (API) provided by the Java platform.

Question 3

polymorphism

Answer 3

allows you to implement multiple methods within the same class that use the same name but a different set of parameters.

Question 4

Encapsulation

Answer 4

It describes the idea of bundling data and methods that work on that data within one unit, e.g., a class in Java.

Question 5

Inheritance provides a powerful and natural mechanism for organizing and structuring your software. This section explains how classes inherit state and behavior from their superclasses, and explains how to derive one class from another using the simple syntax provided by the Java programming language.

Answer 5

inheritance

Question 6

A package is a namespace for organizing classes and interfaces in a logical manner. Placing your code into packages makes large software projects easier to manage. This section explains why this is useful, and introduces you to the Application Programming Interface (API) provided by the Java platform.

Answer 6

package

Question 7

constructor

Answer 7

a special method that is used to initialize a newly created object and is called just after the memory is allocated for the object.

Question 8

An Interface is 100% abstract class. An interface can’t be instantiated (cannot make its objects).

Answer 8

interface

Question 9

allows you to implement multiple methods within the same class that use the same name but a different set of parameters.

Answer 9

polymorphism

Question 10

interface

Answer 10

An interface is a contract between a class and the outside world. When a class implements an interface, it promises to provide the behavior published by that interface. This section defines a simple interface and explains the necessary changes for any class that implements it.

Question 11

a programmer hides all but the relevant data about an object in order to reduce complexity and increase efficiency.

Answer 11

abstraction

Question 12

interface

Answer 12

An Interface is 100% abstract class. An interface can’t be instantiated (cannot make its objects).

Question 13

A class is a blueprint or prototype from which objects are created. This section defines a class that models the state and behavior of a real-world object. It intentionally focuses on the basics, showing how even a simple class can cleanly model state and behavior.

Answer 13

class

Question 14

It describes the idea of bundling data and methods that work on that data within one unit, e.g., a class in Java.

Answer 14

Encapsulation

Question 15

Inheritance

Answer 15

Inheritance provides a powerful and natural mechanism for organizing and structuring your software. This section explains how classes inherit state and behavior from their superclasses, and explains how to derive one class from another using the simple syntax provided by the Java programming language.

Question 16

abstraction

Answer 16

a programmer hides all but the relevant data about an object in order to reduce complexity and increase efficiency.

Question 17

object

Answer 17

An object is a software bundle of related state and behavior. Software objects are often used to model the real-world objects that you find in everyday life. This lesson explains how state and behavior are represented within an object, introduces the concept of data encapsulation, and explains the benefits of designing your software in this manner.

Question 18

a special method that is used to initialize a newly created object and is called just after the memory is allocated for the object.

Answer 18

constructor

Question 19

abstract class

Answer 19

Abstract classes are classes that contain one or more abstract methods. An abstract method is a method that is declared, but contains no implementation. Abstract classes may not be instantiated, and require subclasses to provide implementations for the abstract methods.

Question 20

An interface is a contract between a class and the outside world. When a class implements an interface, it promises to provide the behavior published by that interface. This section defines a simple interface and explains the necessary changes for any class that implements it.

Answer 20

interface

Question 21

An object is a software bundle of related state and behavior. Software objects are often used to model the real-world objects that you find in everyday life. This lesson explains how state and behavior are represented within an object, introduces the concept of data encapsulation, and explains the benefits of designing your software in this manner.

Answer 21

object

Question 22

class

Answer 22

A class is a blueprint or prototype from which objects are created. This section defines a class that models the state and behavior of a real-world object. It intentionally focuses on the basics, showing how even a simple class can cleanly model state and behavior.