Concept of Object Oriented Programs in Python Page-7 section-1

61.

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)

A. The program runs properly and prints 45

B. The program has an error because the value of members of a class can't be changed from outside the class

C. The program runs properly and prints 1

D. The program has an error because the value of members outside a class can only be changed as self.a=45

Answer & Solution Discuss in Board Save for Later

62.

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()

A. The program has an error because display() is trying to print a private class member

B. The program runs fine but nothing is printed

C. The program runs fine and 5 is printed

D. The program has an error because display() can't be accessed

Answer & Solution Discuss in Board Save for Later

63.
Method issubclass() checks if a class is a subclass of another class.

A. True

B. False

Answer & Solution Discuss in Board Save for Later

64.

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())

A. The program has an error because there isn't any function to return self.a

B. The program has an error because b is private and display(self) is returning a private member

C. The program has an error because b is private and hence can't be printed

D. The program runs fine and 1 is printed

Answer & Solution Discuss in Board Save for Later

65.

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()

A. 15

B. 60

C. An exception is thrown

D. 30

Answer & Solution Discuss in Board Save for Later

66.
Methods of a class that provide access to private members of the class are called as . . . . . . . . and . . . . . . . .

A. getters/setters

B. __repr__/__str__

C. user-defined functions/in-built functions

D. __init__/__del__

Answer & Solution Discuss in Board Save for Later

67.
Which principle of OOP is associated with the concept of "IS-A" relationship?

A. Inheritance

B. Encapsulation

C. Abstraction

D. Polymorphism

Answer & Solution Discuss in Board Save for Later

68.

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()

A. 15

B. 30

C. An exception is thrown

D. 60

Answer & Solution Discuss in Board Save for Later

69.
Which of the following statements is true?

A. The __new__() method automatically invokes the __init__ method

B. The __init__ method is defined in the object class

C. The __eq(other) method is defined in the object class

D. The __repr__() method is defined in the object class

Answer & Solution Discuss in Board Save for Later

70.

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()

A. Invalid syntax for inheritance

B. Error because when object is created, argument must be passed

C. Nothing is printed

D. A disp()

Answer & Solution Discuss in Board Save for Later

61.
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)`

Answer & Solution

62.
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()`

Answer & Solution

63.
Method issubclass() checks if a class is a subclass of another class.

Answer & Solution

64.
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())`

Answer & Solution

65.
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()`

Answer & Solution

66.
Methods of a class that provide access to private members of the class are called as . . . . . . . . and . . . . . . . .

Answer & Solution

67.
Which principle of OOP is associated with the concept of "IS-A" relationship?

Answer & Solution

68.
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()`

Answer & Solution

69.
Which of the following statements is true?

Answer & Solution

70.
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()`

Answer & Solution

Concept of Object Oriented Programs in Python

61. 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)

Answer & Solution

62. 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()

Answer & Solution

63. Method issubclass() checks if a class is a subclass of another class.

Answer & Solution

64. 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())

Answer & Solution

65. 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()

Answer & Solution

66. Methods of a class that provide access to private members of the class are called as . . . . . . . . and . . . . . . . .

Answer & Solution

67. Which principle of OOP is associated with the concept of "IS-A" relationship?

Answer & Solution

68. 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()

Answer & Solution

69. Which of the following statements is true?

Answer & Solution

70. 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()

Answer & Solution

61.
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)`

62.
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()`

63.
Method issubclass() checks if a class is a subclass of another class.

64.
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())`

65.
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()`

66.
Methods of a class that provide access to private members of the class are called as . . . . . . . . and . . . . . . . .

67.
Which principle of OOP is associated with the concept of "IS-A" relationship?

68.
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()`

69.
Which of the following statements is true?

70.
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()`