Question – 7: Predict the output of the following code :
Answer: Output:-
y = 5 a = 10
y = 10 a = 2
a + y = 12
y = 5 a = 10
Question – 8: What is wrong with the following function definition?
def addEm(x, y, z):
return x + y + z
print("the answer is", x + y + z)Answer: The control can not reach the print( ) statement. It should be written before return statement.
def addEm(x, y, z):
print("the answer is", x + y + z)
return x + y + z Question – 9: Create a Function that takes no parameter and returns None.
Answer: –
def fun():
return NoneQuestion – 10: Consider the code given (for code refer to book) and answer the questions –
(i) When the code is above executed, what prints out?
Answer: Output:- 5 times 5 = 25
(ii) What is the variable output equal to after the code is executed?
Answer: The value of variable output is 25
Question – 11: Same as Q 10
Answer: –
Question – 12: Find the errors [for code refer to book]-
(a)
Answer: – (a) Missing of colon , in function header. It should be –
def minus (total, decrement ) :
(b) and (c)
Answer: – (b) Error i -> In place of define write def in function header. Error ii-> Missing of colon , in function header. Error iii -> N is string can not be used in arithmetic expression. Error iv -> Return should be return.
Corrected code is:-
def check( ): # Error (i) & (ii)
N = input('Enter N :')
i = 3
answer = 1 + i ** 4 / int(N) #Error (iii)
return answer #Error (iv) (c)
Answer: – (c) Error i -> In function alpha, return statement used two times. It should be one time.
Error ii -> In function beta, Name Error – name ‘n’ is not defined.
Error iii -> Invalid use of : inside the print() .
Error iv -> Invalid use of : inside the print() .
Question – 13: Draw the environment variable
Answer: uploading soon
Question – 14: Draw flow of execution of above code
Answer: 12 -> 1 -> 2 -> 3 -> 4 -> 12 -> 6 -> 7 -> 12 -> 9 -> 10 -> 1 -> 2 -> 3 -> 4 -> 10 -> 6 -> 7 -> 10 -> 12
Question – 15: In the given code, which variables are in the same scope?
Answer: a & b, and c & d
Question – 16: Write a program with a function that takes an integer and prints the number that follows after it. Call the function with these arguments.
4, 6, 8, 2 + 1, 4 – 3 * 2, -3 -2
Answer:
def printfollow(n):
print(n+1)
printfollow(4)
printfollow(6)
printfollow(8)
printfollow(2+1)
printfollow(4-3*2)
printfollow(-3-2)
Output:
5
7
9
4
-1
-4
Question – 17: Write a program with non-void version of above function and then write the flow of execution for both the programs.
Answer:
def printfollow(n):
retutn (n+1)
print(printfollow(4))
print(printfollow(6))
print(printfollow(8))
print(printfollow(2+1))
print(printfollow(4-3*2))
print(printfollow(-3-2))
Output
5
7
9
4
-1
-4
Flow of control of both program Q-16 & Q-17 are :
3->1->2->4->1->2->51->2->6->1->2->7->1->2->8->1->2->End of program
Question – 18: What is the output of following code fragments
(a)
def increment(n):
n.append([4])
return n
L = [1, 2, 3]
M = increment(L)
print(L, M)
Answer: Output:
[1, 2, 3, [4]] [1, 2, 3, [4]]
Question – 18: What is the output of following code fragments
(b)
def increment(n):
n.append([49])
return n[0], n[1], n[2], n[3]
L = [23, 35, 47]
m1, m2, m3, m4 = increment(L)
print(L)
print(m1, m2, m3, m4)
print(L[3] == m4)
Answer: Output:
[23, 35, 47, [49]]
23 35 47 [49]
True
Chapter 3 – Working with Functions
Type C: Programming Practice / Knowledge based Questions
Question – 1: Write a function that takes amount-in-dollars and dollar-to-rupee conversion price; it then returns the amount converted to rupees. Create the function in both void and non-void forms.
Answer: #Dollar to Rupees Conversion
#Que - 1 Dollar To Rupees
#Non-void Function
def dollar_to_rupee(amount):
return amount * 75.45
#Void Function
def dollar_to_rup(amount):
print(amount * 75.45)
print("Dollar to Rupee :: ", dollar_to_rupee(5))
dollar_to_rup(10)
Output:
Dollar to Rupee :: 377.25
754.5
Question – 2: Write a function to calculate volume of a box with appropriate default values for its parameters. You function should have the following input parameters.
- (a) length of box;
- (b) width of box;
- (c) height of box.
Test it by writing complete program to invoke it.
Answer: #Function to calculate volume of box with default value
#Que - 2 : Function to calculate Volume of a box
def calculate_box(length = 3, width = 4, height = 5):
return length * width * height
print("calculate_box()=>",calculate_box())
print("calculate_box(10, 20, 15)=>",calculate_box(10, 20, 15))
print("calculate_box(height = 12) =>",calculate_box(height = 12))
print("calculate_box(10)=>",calculate_box(10))
Output:-
calculate_box()=> 60
calculate_box(10, 20, 15)=> 3000
calculate_box(height = 12) => 144
calculate_box(10)=> 200
Question – 3: Write a program to have following functions :
- (i) a function that takes a number as argument and calculates cube for it. The function does not return a value. If there is no value passed to the function in function call, the function should calculate cube of 2.
- (ii) a function that takes two char arguments and returns True if both the arguments are equal otherwise False.
Answer: #Function to calculate (i) Cube of a number and (ii) Compare two chars
#(i) Cube of a number
def cube(n = 2):
print(n * n * n)
#(ii) Compare two chars
def compare(ch1, ch2):
if ch1 == ch2:
return True
else:
return False
print("cube() =>")
cube()
print("cube(5) =>")
cube(5)
print("compare('a', 'b') =>", compare('a', 'b'))
print("compare('a', 'a') =>",compare('a', 'a'))
Output:
cube() =>
8
cube(5) =>
125
compare(‘a’, ‘b’) => False
compare(‘a’, ‘a’) => True
Question – 4: Write a function that receives two numbers and generates a random number from that range . Using this function, the main program should be able to print three numbers randomly.
Answer: #Function to generate random number. Creates three random number using this function.
import random
def generate_random(a, b):
return random.randint(a,b)
print("First Random Number :: ",generate_random(5,10))
print("Second Random Number :: ",generate_random(50,100))
print("Third Random Number :: ",generate_random(1, 25))
Output:
First Random Number :: 6
Second Random Number :: 75
Third Random Number :: 1
First Random Number :: 7
Second Random Number :: 57
Third Random Number :: 8
First Random Number :: 10
Second Random Number :: 93
Third Random Number :: 19
