gs gs109 Python OOPs - Python Inheritance - Quiz No.3
gs gs109 Python Quiz
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Question 1: What will be the output of the following Python code?
>>> class A: pass >>> class B(A): pass >>> obj=B() >>> isinstance(obj,A)
True
False
Wrong syntax for isinstance() method
Invalid method for classes
Question 2: Which of the following statements is true?
The __new__() method automatically invokes the __init__ method
The __init__ method is defined in the object class
The __eq(other) method is defined in the object class
The __repr__() method is defined in the object class
Question 4: What will be the output of the following Python code?
class A: def __init__(self): self.__x = 1 class B(A): def display(self): print(self.__x) def main(): obj = B() obj.display() main()
1
0
Error, invalid syntax for object declaration
Error, private class member can’t be accessed in a subclass
Question 5: What will be the output of the following Python code?
class A: def __init__(self): self._x = 5 class B(A): def display(self): print(self._x) def main(): obj = B() obj.display() main()
Error, invalid syntax for object declaration
Nothing is printed
5
Error, private class member can’t be accessed in a subclass
Question 6: What will be the output of the following Python code?
class A: def __init__(self,x=3): self._x = x class B(A): def __init__(self): super().__init__(5) def display(self): print(self._x) def main(): obj = B() obj.display() main()
5
Error, class member x has two values
3
Error, protected class member can’t be accessed in a subclass
Question 7: What will be the output of the following Python code?
class A: def test1(self): print(" test of A called ") class B(A): def test(self): print(" test of B called ") class C(A): def test(self): print(" test of C called ") class D(B,C): def test2(self): print(" test of D called ") obj=D() obj.test() test of B called test of C calledtest of C called test of B called
test of B called
Error, both the classes from which D derives has same method test()
Question 8: What will be the output of the following Python code?
class A: def test(self): print("test of A called") class B(A): def test(self): print("test of B called") super().test() class C(A): def test(self): print("test of C called") super().test() class D(B,C): def test2(self): print("test of D called") obj=D() obj.test() test of B called test of C called test of A calledtest of C called test of B calledtest of B called test of C called
Error, all the three classes from which D derives has same method test()
