Python Questions and Answers – Classes and Objects – 1

This set of Python Multiple Choice Questions & Answers (MCQs) focuses on “Classes and Objects – 1”.

1. _____ represents an entity in the real world with its identity and behaviour.
a) A method
b) An object
c) A class
d) An operator
View Answer

2. _____ is used to create an object.
a) class
b) constructor
c) User-defined functions
d) In-built functions
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3. What will be the output of the following Python code?

class test:
     def __init__(self,a="Hello World"):
         self.a=a
 
     def display(self):
         print(self.a)
obj=test()
obj.display()

a) The program has an error because constructor can’t have default arguments
b) Nothing is displayed
c) “Hello World” is displayed
d) The program has an error display function doesn’t have parameters
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4. What is setattr() used for?
a) To access the attribute of the object
b) To set an attribute
c) To check if an attribute exists or not
d) To delete an attribute
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5. What is getattr() used for?
a) To access the attribute of the object
b) To delete an attribute
c) To check if an attribute exists or not
d) To set an attribute
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6. What will be the output of the following Python code?

class change:
    def __init__(self, x, y, z):
        self.a = x + y + z
 
x = change(1,2,3)
y = getattr(x, 'a')
setattr(x, 'a', y+1)
print(x.a)

a) 6
b) 7
c) Error
d) 0
View Answer

7. What will be the output of the following Python code?

 class test:
     def __init__(self,a):
         self.a=a
 
     def display(self):
         print(self.a)
obj=test()
obj.display()

a) Runs normally, doesn’t display anything
b) Displays 0, which is the automatic default value
c) Error as one argument is required while creating the object
d) Error as display function requires additional argument
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8. Is the following Python code correct?

>>> class A:
	def __init__(self,b):
		self.b=b
	def display(self):
		print(self.b)
>>> obj=A("Hello")
>>> del obj

a) True
b) False
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9. What will be the output of the following Python code?

class test:
    def __init__(self):
        self.variable = 'Old'
        self.Change(self.variable)
    def Change(self, var):
        var = 'New'
obj=test()
print(obj.variable)

a) Error because function change can’t be called in the __init__ function
b) ‘New’ is printed
c) ‘Old’ is printed
d) Nothing is printed
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10. What is Instantiation in terms of OOP terminology?
a) Deleting an instance of class
b) Modifying an instance of class
c) Copying an instance of class
d) Creating an instance of class
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11. What will be the output of the following Python code?

class fruits:
    def __init__(self, price):
        self.price = price
obj=fruits(50)
 
obj.quantity=10
obj.bags=2
 
print(obj.quantity+len(obj.__dict__))

a) 12
b) 52
c) 13
d) 60
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12. What will be the output of the following Python code?

 class Demo:
    def __init__(self):
        pass
 
    def test(self):
        print(__name__)
 
obj = Demo()
obj.test()

a) Exception is thrown
b) __main__
c) Demo
d) test
View Answer

Sanfoundry Global Education & Learning Series – Python.

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