GATE DA Python OOP, Modules & Exception Handling

GATE DA Python OOP, Modules & Exception Handling | Set 1

Questions 36-40 of 100

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Question 36

MCQ · Single Correct 1 mark

What error is raised if a class hierarchy creates an invalid/inconsistent MRO during class definition?

A AttributeError: MRO failed B SyntaxError: Invalid MRO structure C RecursionError: Cyclic MRO detected D TypeError: Cannot create a consistent method resolution order (MRO)

Question 37

NAT · Numerical Answer 1 mark

PYTHON

What will be printed?
class A:
    def calc(self, x):
        return x + 1
class B(A):
    def calc(self, x):
        return x * 2
class C(B):
    pass

print(C().calc(4))

Enter your numerical answer

Question 38

MCQ · Single Correct 1 mark

Which built-in attribute stores the tuple of class objects in MRO order?

A $Class.__mro__$ B $Class.__order__$ C $Class.__bases__$ D $Class.__parents__$

Question 39

NAT · Numerical Answer 1 mark

PYTHON

Evaluate:
class A:
    def __init__{self}:
        self.v = 10
class B(A):
    def __init__{self}:
        super().__init__()
        self.v += 20
class C(A):
    def __init__{self}:
        super().__init__()
        self.v += 30
class D(B, C):
    def __init__{self}:
        super().__init__()

print(D().v)

Enter your numerical answer

Question 40

MCQ · Single Correct 1 mark

What is Class.__bases__ attribute in Python?

A A boolean indicating if the class is abstract. B A tuple containing the immediate base classes of the given class. C A dictionary of all methods defined in the class. D A list of all subclasses inheriting from the given class.