Concept Of Object Oriented Programs In Python — Part 2 MCQs with Explanations

__b is the correct answer to “Which of these is a private data field? def Demo: def __init__(self): __a = 1 self.__b = 1 self.__c__ = 1 __d__= 1”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

5 is the correct answer to “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()”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

False is the correct answer to “Private members of a class cannot be accessed.”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

It allows you to define a method that can be accessed like an attribute is the correct answer to “What is the purpose of the @property decorator in object-oriented programming”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

To hide the internal details of an object and provide a controlled way to access and modify its attributes is the correct answer to “What is the purpose of using encapsulation in object-oriented programming”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

By defining methods in a subclass that have the same name but different implementations as those in the parent class is the correct answer to “How is polymorphism implemented in object-oriented programming”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

To initialize the attributes of an object when it is created is the correct answer to “What is the primary purpose of a constructor in object-oriented programming”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

1 2 is the correct answer to “What will be the output of the following Python code? class A: def __init__(self, x= 1): self.x = x class der(A): def __init__(self,y = 2): super().__init__() self.y = y def main(): obj = der() print(obj.x, obj.y) main()”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

Demo's check Demo's check is the correct answer to “What will be the output of the following Python code? class Demo: def __check(self): return " Demo's check " def display(self): print(self.check()) class Demo_Derived(Demo): def __check(self): return " Derived's check " Demo().display() Demo_Derived().display()”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

They can be accessed by name mangling method is the correct answer to “Which of the following is false about protected class members”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

Instantiation is the correct answer to “Which of these is not a fundamental features of OOP”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

To hide the internal details of an object and provide a controlled way to access and modify its attributes is the correct answer to “What is the main advantage of using encapsulation in object-oriented programming”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

True is the correct answer to “What will be the output of the following Python code? class A: def __init__(self, x, y): self.x = x self.y = y def __str__(self): return 1 def __eq__(self, other): return self.x * self.y == other.x * other.y obj1 = A(5, 2) obj2 = A(2, 5) print(obj1 == obj2)”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

False is the correct answer to “All subclasses are a subtype in object-oriented programming.”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

0 1 is the correct answer to “What will be the output of the following Python code? class Test: def __init__(self): self.x = 0 class Derived_Test(Test): def __init__(self): Test.__init__(self) self.y = 1 def main(): b = Derived_Test() print(b.x,b.y) main()”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

Overriding is the correct answer to “Which principle of OOP allows a class to provide a specific implementation of a method that is already defined in its parent class”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

The program runs properly and prints 45 is the correct answer to “What will be the output of the following Python code? class Demo: def __init__(self): self.a = 1 self.__b = 1 def get(self): return self.__b obj = Demo() obj.a=45 print(obj.a)”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

The program runs fine and 5 is printed is the correct answer to “What will be the output of the following Python code? class fruits: def __init__(self): self.price = 100 self.__bags = 5 def display(self): print(self.__bags) obj=fruits() obj.display()”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

True is the correct answer to “Method issubclass() checks if a class is a subclass of another class.”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

The program runs fine and 1 is printed is the correct answer to “What will be the output of the following Python code? class Demo: def __init__(self): self.a = 1 self.__b = 1 def get(self): return self.__b obj = Demo() print(obj.get())”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

30 is the correct answer to “What will be the output of the following Python code? class A: def __init__(self): self.multiply(15) print(self.i) def multiply(self, i): self.i = 4 * i; class B(A): def __init__(self): super().__init__() def multiply(self, i): self.i = 2 * i; obj = B()”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

getters/setters is the correct answer to “Methods of a class that provide access to private members of the class are called as . . . . . . . . and . . . . . . . .”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

Inheritance is the correct answer to “Which principle of OOP is associated with the concept of "IS-A" relationship”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

30 is the correct answer to “What will be the output of the following Python code? class A: def __init__(self): self.multiply(15) def multiply(self, i): self.i = 4 * i; class B(A): def __init__(self): super().__init__() print(self.i) def multiply(self, i): self.i = 2 * i; obj = B()”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

A disp() is the correct answer to “What will be the output of the following Python code? class A(): def disp(self): print("A disp()") class B(A): pass obj = B() obj.disp()”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

A.__init__(self) is the correct answer to “Suppose B is a subclass of A, to invoke the __init__ method in A from B, what is the line of code you should write”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

Error because class B inherits A but variable x isn't inherited is the correct answer to “What will be the output of the following Python code? class Test: def __init__(self): self.x = 0 class Derived_Test(Test): def __init__(self): self.y = 1 def main(): b = Derived_Test() print(b.x,b.y) main()”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

Derived_Demo's __new__() invoked Demo's __init__() invoked Demo's __new__() invoked is the correct answer to “What will be the output of the following Python code? class Demo: def __new__(self): self.__init__(self) print("Demo's __new__() invoked") def __init__(self): print("Demo's __init__() invoked") class Derived_Demo(Demo): def __new__(self): print("Derived_Demo's __new__() invoked") def __init__(self): print("Derived_Demo's __init__() invoked") def main(): obj1 = Derived_Demo() obj2 = Demo() main()”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

False is the correct answer to “When defining a subclass in Python that is meant to serve as a subtype, the subtype Python keyword is used.”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

It allows objects of different classes to be treated uniformly is the correct answer to “What is the main advantage of using polymorphism in object-oriented programming”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

It allows objects of different classes to be treated uniformly is the correct answer to “What is the benefit of using polymorphism in object-oriented programming”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

B is the correct answer to “What will be the output of the following Python code? class A: def one(self): return self.two() def two(self): return 'A' class B(A): def two(self): return 'B' obj2=B() print(obj2.two())”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

The program runs fine and 8.7 is printed is the correct answer to “What will be the output of the following Python code? class student: def __init__(self): self.marks = 97 self.__cgpa = 8.7 def display(self): print(self.marks) obj=student() print(obj._student__cgpa)”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

test of B called is the correct answer to “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()”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

1 7 is the correct answer to “What will be the output of the following Python code? class A: def __init__(self): self.__i = 1 self.j = 5 def display(self): print(self.__i, self.j) class B(A): def __init__(self): super().__init__() self.__i = 2 self.j = 7 c = B() c.display()”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

1 2 3 is the correct answer to “What will be the output of the following Python code? class A: def __repr__(self): return "1" class B(A): def __repr__(self): return "2" class C(B): def __repr__(self): return "3" o1 = A() o2 = B() o3 = C() print(obj1, obj2, obj3)”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

False is the correct answer to “Overriding means changing behaviour of methods of derived class methods in the base class.”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

By exposing essential features and hiding complex implementation details is the correct answer to “How is the concept of abstraction achieved in object-oriented programming”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

Multi-level inheritance is the correct answer to “What type of inheritance is illustrated in the following Python code? class A(): pass class B(A): pass class C(B): pass”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.

The program has an error because b is private and hence can't be printed is the correct answer to “What will be the output of the following Python code? class Demo: def __init__(self): self.a = 1 self.__b = 1 def display(self): return self.__b obj = Demo() print(obj.__b)”. This question is standard in competitive examination syllabi for Concept Of Object Oriented Programs In Python.