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12th Standard Computer Science English Medium - Python Classes and Objects 2 Mark Book Back Question Paper and Answer Key 2022 - 2023

Published on: 10/09/2022

QB365 provides a detailed and simple solution for every Possible Book Back Questions in Class 12 Computer Science Subject - Python Classes and Objects , English Medium. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.

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Std: 12th Standard - Computer Science

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Questions:

Generic 2

5 x 2 = 10

What is the purpose of Destructor?

How will you create constructor in Python?

What is the output of the following program?
Class Sample:
__num=10
def disp(self):
print(self.__num)
S=Sample()
S.disp()
print(S.__num)

What is instantiation?

What is class?

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Answers Key:

Generic 2

5 x 2 = 10

Destructor is also a special method to destroy the objects. In Python,__del__( ) method is used as destructor. It is just opposite to constructor.

(i) "Init" is a special function begin an end with double underscore in Python act as a Constructor .
(ii) Constructor function will automatically executed when an object is created.
General format of __init__ method
(Constructor function)
def __init__ (self, [args........])
<statements>

Output:
>>>
10
line 7, in <module>
print(S._num)
AttributeError: 'Sample' object has no attribute '_num'
>>>

Once a class is created, next to create an object or instance of that class. This process of creating object is called as "Class Instantiation".

(i) Class is the main building block in Python.
(ii) Class is a template for the object.
(iii) Object is a collection of data and function that act on those data.
(iv) Objects are also called as instances of a class.