Python Scripting - Week 7

Question 1

What is the abbreviations of OOP ?

Answer 1

Object Oriented Programming

Question 2

What is not a object in python ?

Answer 2

Reserved keywords are not objects

Question 3

Can we assighn objects to variables ?

Answer 3

Yes,
print is an function object , we can assign it to variable and use it as print function ?

Question 4

What is class instance ?

Answer 4

x = MyClass()
object of class

Question 5

How to Define a class in Python ?

Answer 5

class myclass:
x=1234
def f():
return ‘Hello World’

Question 6

How to access class variable ?

Answer 6

class myclass:
x=1234
def f():
return ‘Hello World’
a=myclass()
print(f”Class Variable : {a.x}”)

Question 7

How to access class method ?

Answer 7

class myclass:
x=1234
def f():
return ‘Hello World’
a=myclass()
print(f”Class Variable : {a.x}”)

Question 8

What is the first argument of function in class ?

Answer 8

The first argument of a function in class is always self , self is an instance of class, it implicitly passed

Question 9

Which class object is mutable by class instance ?

Answer 9

I you want to modify class variable by class instance , you have to use list.
class Car():
num=[]
def __init__(self):
pass
a=Car()
a.num.append(1)
Car.num.append(1)

Question 10

Which function returns list of the attributes and methods of any object ?

Answer 10

dir() is a powerful inbuilt function in Python3, which returns list of the attributes and methods of any object

Question 11

Define a dunder method ?

Answer 11

class Book:
def __str__(self):
return f”Its a Book Method”

b=Book()
print(b)

Question 12

How to print class instance ?

Answer 12

We have to use dunder method
def__str__(self):
return f”This string will be printed when class instance is printed “