PRIP 3.1 Sumita Arora Solutions | Class 12 Computer Science

Here are PRIP 3.1 Sumita Arora Solutions for class 12 Computer Science. To view Sumita Arora solutions for all chapters, visit here.

Q.1: Carefully go through following sample code and identify various parts of functions.
(a)    def sub1(a, b):
              print(b, "- ", a,"=", b-a)
(b)    def cube2(x):
            return x*x*x-x

(c)    def cube1(x):
             return x*x*x
(d)    def greeting():
              print("Welcome to Python")

Answer:

a)

Function Name

sub1

 

Takes any argument:

If yes, their names

a, b

 

Number of statements in the function-body

1

 

Returns any value?

No

 

What is it doing?(Carefully read the code and write a line about its functionality)

Prints subtraction of a and b

b)

Function Name

Cube2

 

Takes any argument:

If yes, their names

x

 

Number of statements in the function-body

1

 

Returns any value?

yes

 

What is it doing?(Carefully read the code and write a line about its functionality)

Returns the subtraction of cube of x and x

(x3-x)

c)

Function Name

cube1

 

Takes any argument:

If yes, their names

x

 

Number of statements in the function-body

1

 

Returns any value?

Yes

 

What is it doing?(Carefully read the code and write a line about its functionality)

Returns cube of x

d)

Function Name

greeting

 

Takes any argument:

If yes, their names

No

 

Number of statements in the function-body

1

 

Returns any value?

No

 

What is it doing?(Carefully read the code and write a line about its functionality)

Prints “Welcome to Python”

Q.2: There are some function call statements given below. Pick the function call statements for the function definitions given
in question 1:
(a) subtract(3, 5)         (b) cube2(7, x) 
(c) sub( 5, 3)             (d) cube1(a, a, a)
(e) greetings('hello')      (f) sub2(8,9) 
(g) greeting()              (h) sub1(x, y)
(i) cube1(x)                (j) sub2(p, q) 
(k) sub1(5,3)               (k) cube2(num) 
(m) sub1(8,9,10)         (n) cube(7)

Answer:

Function call statements for sub1()

sub1(x, y), sub1(5,3)

Function call statements for cube1()

cube1(x)

Function call statements for cube2()

cube2(num)

Function call statements for greeting()

greeting()

Q.3: If you carefully observe the function definitions of question 1, you’ll find functions sub1() and cube2() are basically doing the same thing  – calculating difference between two values. Logically they are doing same thing but technically these are different. What is difference?(Hint-carefully look at the function bodies)

Answer:

Sub1() takes two argument a and b 
and returns subtraction of a and b.Where cube2() takes only one argument
and returns subtraction between cube of x and x (x3-x)
Cube2 involves calculation of cube of x and subtraction of x3  and x i.e. 2 operations and returns value 
While sub1() just prints subtraction of a and b and returns nothing

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