Classes and Objects in Python
practice.

How can you create a private attribute in a Python class?

What will be the output of the following Python code?

def add(c,k):
    c.test=c.test+1
    k=k+1
class A:
    def __init__(self):
        self.test = 0
def main():
    Count=A()
    k=0
 
    for i in range(0,25):
        add(Count,k)
    print("Count.test=", Count.test)
    print("k =", k)
main()

Which function overloads the // operator?

What will be the output of the following Python code?

class test:
     def __init__(self,a):
         self.a=a
 
     def display(self):
         print(self.a)
obj=test()
obj.display()

What will be the output of the following Python code?

class Demo:
    def __init__(self):
        pass
 
    def test(self):
        print(__name__)
 
obj = Demo()
obj.test()

Special methods need to be explicitly called during object creation.

Which of the following is not a class method?

What is the purpose of the super() function in Python classes?

What will be the output of the following Python code?

class change:
    def __init__(self, x, y, z):
        self.a = x + y + z
 
x = change(1,2,3)
y = getattr(x, 'a')
setattr(x, 'a', y+1)
print(x.a)

Which of the following Python code creates an empty class?

What will be the output of the following Python code?

class test:
    def __init__(self):
        self.variable = 'Old'
        self.Change(self.variable)
    def Change(self, var):
        var = 'New'
obj=test()
print(obj.variable)

Is the following Python code correct?

>>> class A:
	def __init__(self,b):
		self.b=b
	def display(self):
		print(self.b)
>>> obj=A("Hello")
>>> del obj

Let A and B be objects of class Foo. Which functions are called when print(A + B) is executed?

What will be the output of the following Python code?

class fruits:
    def __init__(self, price):
        self.price = price
obj=fruits(50)
 
obj.quantity=10
obj.bags=2
 
print(obj.quantity+len(obj.__dict__))

What is hasattr(obj,name) used for?

What will be the output of the following Python code?

class stud:
   ‘Base class for all students’
   def __init__(self, roll_no, grade):
      self.roll_no = roll_no
      self.grade = grade
   def display (self):
      print("Roll no : ", self.roll_no,  ", Grade: ", self.grade)
print(student.__doc__)

What is the output of the following code:
class Parent:
x = 10
class Child(Parent):
pass
obj = Child()
print(obj.x)

How can you check if an object belongs to a specific class in Python?

__del__ method is used to destroy instances of a class.

Which function overloads the >> operator?