Page 258 - C++

CBSE AISSCE 2016-2017 Marking Scheme for Computer Science
(Sub Code: 083 Paper Code 91/1 Delhi)

Ans class RING:​ ​# OR class RING( ): ​OR class RING(Object):

def __init__(self):
self.RingID=101
self.Radius=10
self.Area=0

def AreaCal(self):
self.Area=3.14*self.Radius*self.Radius

def NewRing(self):
self.RingID=input("Enter RingID")
self.Radius=input("Enter radius")
self.AreaCal() # OR AreaCal(self)
def ViewRing(self):
print self.RingID
print self.Radius
print self.Area

(½ Mark for correct syntax for class header)
(½ Mark for correct declaration of instance attributes)
(1 Mark for correct definition of AreaCal() function)
(1 Mark for correct definition of NewRing() with invocation of AreaCal( ))
(1 Mark for correct definition of ViewRing())
NOTE:
Deduct ½ Mark if AreaCal() is not invoked properly inside NewRing() function
(d) Differentiate between static and dynamic binding in Python? Give suitable 2
examples of each.

Ans Static Binding: It allows linking of function call to the function definition during
compilation of the program.

Dynamic Binding: It allows linking of a function during run time. That means the
code of the function that is to be linked with function call is unknown until it is
executed. Dynamic binding of functions makes the programs more flexible.

(1 mark for each correct explanation of static and dynamic binding)
OR
(1 for each correct example of static and dynamic binding)
(e) Write two methods in Python using concept of Function Overloading 2
(Polymorphism) to perform the following operations:
(i) A function having one argument as side, to calculate Area of Square as
side*side
(ii) A function having two arguments as Length and Breadth, to calculate Area of
Rectangle as Length*Breadth.
Ans def Area(side):
print side*side
def Area(length,breadth):
print length*breadth

Page #17 of 28