Encapsulation And Inheritance

Question 1

define encapsulation

Answer 1

the process of wrapping data and functions together as a unit

Question 2

how can encapsulation be made possible

Answer 2

by declaring the class members as private

Question 3

private visibility supports what

Answer 3

data hiding, as once data members are declared private, their accessibility remains limited up to the class block

Question 4

define scope of variable

Answer 4

refers to the extent of their usage in a program

Question 5

define instance variables

Answer 5

the variables that are declared within a class, outside the member methods. AKA data members
they are automatically allocated as individual copy of each object of the class

Question 6

scope of use of private

Answer 6

within the scope of class

Question 7

scope of usage of public

Answer 7

accessed outside of class visibility

Question 8

scope of usage of protected

Answer 8

used simply as private members within the class in which they exist, but can be accessed to derived class

Question 9

define class variable

Answer 9

declared within the class along with a keyword static .
AKA static data member

Question 10

difference between static and non static instance variable

Answer 10

static: common copy for all objects of the class
non static: separate copy for all objects

Question 11

define local variable

Answer 11

a variable that is declared within a function or method
hold values temporarily during any operation

Question 12

define inheritance

Answer 12

a process by which some properties of a class are shared by another class or classes is known as inheritance

Question 13

define base class and derived class

Answer 13

a base class is inherited by another class
a derived class or Target/ sub class inherits from a base class

Question 14

types of inheritance

Answer 14

1. single inheritance
2. multiple inheritance
3. hierarchical inheritance
4. nested/multilevel inheritance
5. hybrid inheritance