LESSON 4

Question 1

One of the core concepts in object-oriented programming is inheritance

Answer 1

Inheritance

Question 2

It is a mechanism that allows you to create a hierarchy of classes that share a set of _____ and _____ by deriving a class from another class

Answer 2

• Inheritance
• properties
• methods

Question 2

the class whose features are inherited by other classes

Answer 2

SuperClass(Parent/BaseClass)

Question 3

The class that inherits the features of other classes. ______ can also have their own features in addition to the inherited ones.

Answer 3

Sub Class (Child Class)

Question 4

The concept where we can derive a new class from existing classes

Answer 4

Reusability

Question 5

represents real-world relationships well.

Answer 5

Inheritance

Question 6

Inheritance

• It provides the _____ of a code. We don’t have to write the same code
  again and again. Also, it allows us to _______ to a class without
  modifying it.

Answer 6

• Inheritance
• reusability
• add more features

Question 7

which means that if class Y inherits from another class X, then all the subclasses of Y would automatically inherit from class X.

Answer 7

• Inheritance
• transitive in nature

Question 8

To further understand this mechanism of OOP, we use the ______ , where we create a subclass by including the name of the parent class as a ______

Answer 8

• Inheritance
• IS-A relationship
• parameter

Question 8

● A child class needs to identify which class is its parent class.
● This can be done by mentioning the parent class name in the definition of the child class.

Answer 8

Subclassing

Question 9

In order to properly use the attributes of the parent class, you must either

Answer 9

● Invoke the constructor of the parent class
● Do not create a constructor for the subclass and use Getters and Setters instead.

Question 10

If you forget to invoke the _______ of the parent class then its instance variables would not be available to the child class

Answer 10

• Subclassing
• __init__()

Question 10

to access the parent’s class methods and
functions.

Answer 10

• super()function
• Subclassing

Question 10

five types of inheritance

Answer 10

● Single Inheritance
● Multiple Inheritance
●Multilevel Inheritance
● Hierarchical Inheritance
● Hybrid Inheritance

Question 11

enables a derived class to inherit properties from a single parent class, thus enabling code reusability and the addition of new features to existing code.

Answer 11

Single Inheritance

Question 12

When a class is derived from more than one base class, this type of inheritance is called ________

Answer 12

Multiple Inheritance

Question 13

features of the base class and the derived class are further inherited into the new derived class.

Answer 13

Multilevel Inheritance

Question 14

In Multilevel Inheritance, This is similar to a relationship representing ________

Answer 14

child and grandfather

Question 15

more than one derived class are created from a single base, this type of inheritance

In this program, we have a parent(___) class and two or more child (____) classes.

Answer 15

• Hierarchical Inheritance
• base
• derived

Question 16

The word polymorphism means having _________

Answer 16

many forms

Question 16

Inheritance consisting of multiple types of inheritance

Answer 16

Hybrid Inheritance

Question 16

means the same function name (but different signatures) being used for different types.

Answer 16

Polymorphism

Question 17

In such cases, we re-implement the method in the child class. This process of re-implementing a method in the child class is known

Answer 17

Method Overriding.