InfyTQ OOPS Concepts (Python) Quiz 1

Question 1

Time: 00:00:00

To create an object ______ is used.

class

constructor

User-defined functions

In-built functions

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Question 2

Time: 00:00:00

_____ represents an entity in the real world with its identity and behaviour.

An object

An operator

A class

A method

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Question 3

Time: 00:00:00

class pizza:

    def __init__(self, money):

        self.money = money

obj=pizza(99)

obj.amount=4

obj.total=2

print(obj.amount+len(obj.__dict__))

The output of the following code will be:

6

7

99

105

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Question 4

Time: 00:00:00

class test():

    def __repr__(self):

	    return 'This is called'

    def __str__(self):

	    return 'No! This is called'

s=test()

print(s)

This is called

Nothing is printed

Error

No! This is called

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Question 5

Time: 00:00:00

hasattr(obj, name) is used to?

access the attribute of the object

delete an attribute

check if an attribute exists or not

set an attribute

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Question 6

Time: 00:00:00

The output to the following code will be:

class Engineer:

    'Base class for all students'

    def __init__(self, id_no, score):

       self.id_no = id_no

       self.score = score

    def display (self):

       print("Roll no : ", self.id_no,  ", Grade: ", self.score)

print(Engineer.__doc__)

None

Nothisg is printed

Base class for all students

Error

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Question 7

Time: 00:00:00

predict the output

class Demo:

    def __init__(self):

        self.x = 0

class Derived_Demo(Demo):

    def __init__(self):

        self.y = 1

def main():

    b = Derived_Demo()

    print(b.x,b.y)

main()

0 1

1 0

0 0

Error

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Question 8

Time: 00:00:00

Determine the type if Inheritance:

class prep():

    pass

class insta():

    pass

class python(prep, insta):

    pass

Multi-level inheritance

Multiple inheritance

Hierarchical inheritance

Single-level inheritance

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Question 9

Time: 00:00:00

Which one is not true?

A non-private method in a superclass can be overridden

A derived class is a subset of a superclass

The value of a private variable in the superclass can be changed in the subclass

When invoking the constructor from a subclass, the constructor of the superclass is automatically invoked

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Question 10

Time: 00:00:00

What will be the output of the following code:

class D:

    def __init__(self,x):

        self.x = x

    def count(self,x):

        self.x = self.x+1

class C(D):

    def __init__(self, y=0):

        D.__init__(self, 5)

        self.y = y

    def count(self):

        self.y += 1     

def main():

    obj = C()

    obj.count()

    print(obj.x, obj.y)

main()