Introduction

Question 1

OOP meaning

Answer 1

method of programming based on a hierarchy of classes with well defined and cooperating objects. A language model organized around objects

Question 2

Object

Answer 2

executable copy of a class

Question 3

Characteristics of objects

Answer 3

state and behavior

Question 4

Class

Answer 4

blueprint from which individual objects are created

Question 5

Package

Answer 5

namespace that organizes a set of related classes and interfaces

Question 6

Interface

Answer 6

group of related methods with empty bodies

Question 7

Encapsulation

Answer 7

concept that enables hiding of unnecessary details in classes and only providing a clear and simple interface for working with them

Question 8

Inheritance

Answer 8

enable new objects to take on the properties of existing objects

Question 9

Superclass

Answer 9

basis for inheritance

Question 10

Subclass

Answer 10

class that inherits from a superclass

Question 11

Abstraction

Answer 11

process of extracting common features from specific examples

Question 12

Types of Abstraction

Answer 12

data, functional and object

Question 13

Polymorphism

Answer 13

ability to present the same interface for differing underlying forms

Question 14

Types of Polymorphism

Answer 14

method overloading and overriding

Question 15

Garbage Collection

Answer 15

form of automatic memory management whereby the garbage collector attempts to reclaim garbage or memory occupied by objects that are no longer in use by the program

Question 16

Characteristics of OOP

Answer 16

enscapulation
Inheritance
abstraction
polymorphism
message passing
garbage collection

Question 17

Variable

Answer 17

container that holds values used in a java program

Question 18

Types of Variables

Answer 18

Instance
Class
Local variables
Parameters