Random Module in Python 2-3 Marks

Theory/Concept-Based Questions

1. Which module in Python is used to generate Random numbers?

Answer: random module.

2. What is a random module? Write the statement to import a random module?

Answer: Random module is a random-number generator, which generates a random number by chance i.e. randomly.

import random # to import a random module

3. Write the name of the functions available in the random module.

Answer: random() , randint(), uniform( ), randrange()

4. Explain the uses of random(), randint(), uniform( ), randrange()

Answer: Uses of random module functions are

Function Name	Uses / Description	Example
random( )	returns a random floating point number N in the range(0.0, 1.0). The generated number is greater than or equal to 0.0 and less than 1.0.	>>> import random >>> random.random() 0.896986986196
randint(a,b)	returns a random integer N in the range(a,b) i.e. a <=N <= b.	>>>random.randint(1,4) 4 >>>random.randint(1,4) 2 >>>random.randint(1,4) 1
uniform(a, b)	returns a random floating point number N in the range(a,b) i.e. a <=N <= b.	>>>random.uniform(11,55) 32.42694236141252
randrange(stop) randrange(start, stop, step)	it returns a randomly selected element from range(start, stop, step)	>>>random.randrange(5) 4 >>>random.randrange(5,15,4) 9

Application/Output-Based Question Answer

5. Write the statement to generate a random floating point number between 25 to 50.

Answer: import random

number1 = random.random( ) * (50-25) + 25 #method 1

number2 = random.uniform(25, 50) #method 2

print(number1)

print(number2)

6. Write the statement to generate a random integer number between 25 to 50.

Answer: import random

number1 = int( random.random( ) * (50-25) + 25 ) #method 1

number2 = random.randint(25, 50) #method 2

print(number1)

print(number2)

7. What could be the minimum possible and maximum possible numbers by the following code?

import random
print(random.randint(15, 30) - 7)

Answer: Minimum possible number = 8

Maximum possible number = 23

8. Consider the following code:

import random
print( int(20 + random.random() * 5), end = ' ')
print( int(20 + random.random() * 5), end = ' ')
print( int(20 + random.random() * 5), end = ' ')
print( int(20 + random.random() * 5))

Find the suggested output options (i) to (iv). Also, write the least value and highest value that can be generated.

(a) 20 22 24 25 (b) 22 23 24 25 (c) 23 24 23 24 (d) 21 21 21 21

Answer: Options (c) and (d) are possible.

Least Value = 20

Highest Value = 24

9. Consider the following code:

import random
print( 100 + random.randint(5,10), end = ' ')
print( 100 + random.randint(5,10), end = ' ')
print( 100 + random.randint(5,10), end = ' ')
print( 100 + random.randint(5,10))

Find the suggested output options (i) to (iv). Also, write the least value and highest value that can be generated.

(a) 102 105 104 105 (b) 110 103 104 105 (c) 105 107 105 110 (d) 110 105 105 110

Answer: Options (c) and (d) are possible.

Least Value = 105

Highest Value = 110

10. Consider the following code:

import random
r = random.randrange (100, 999, 5) #line 2
print(r, end = ' ')
r = random.randrange(100, 999, 5)
print(r, end = ' ')
r = random.randrange (100, 999, 5)
print(r)

Find the suggested output options (i) to (iv). what can be the maximum and minimum number generated by line 2?

(a) 655, 705, 220 (b) 380, 382, 505 (c) 100, 500, 999 (d) 345, 650, 110

Answer: Options (a) and (d) are possible.

Minimum Number = 100

Maximum Number = 995

11. Consider the following code:

import random
r = random.randrange (50, 100) - 50 #line 2
print(r, end = ' ')
r = random.randrange (50, 100) - 50
print(r, end = ' ')

Find the suggested output options (i) to (iv). what can be the maximum and minimum number generated by line 2?

(a) 49 55 (b) 12 9 (c) 1 39 (d) 3 98

Answer: Options (b) and (c) are possible.

Minimum Number = 0

Maximum Number = 49

12. Consider the following code:

import random
AR = [20, 30, 40, 50, 60, 70]
Lower = random.randint(1, 3)
Upper= random.randint(2, 4)
for K in range (Lower, Upper+1):
    print(AR[K], end=”#”)

What possible output(s) are expected to be displayed on the screen at the time of execution of the program from the following code? Also, specify the Minimum and Maximum values that can be assigned to each of the variables Lower and Upper

(a) 10#40#70# (b) 30#40#50# (c) 50#60#70# (d) 40#50#70#

Answer: Options (b)

Lower : – Minimum Value = 1, Maximum Value = 3

Upper: – Minimum Value = 2, Maximum Value = 4

13. Consider the following code:

import random

STRING="CBSEONLINE"
NUMBER = random.randint (0, 3)
N=9
while STRING[N] != "L":
    print (STRING[N] + STRING[NUMBER] +  "#", end = " ")
    NUMBER = NUMBER +1
    N=N-1

(a) ES#NE#IO# (b)LE#NO#ON# (c) NS#IE#LO# (d) EC#NB#IS#

Answer: Options (a) and (d) are possible.

Number : – Minimum Value = 0, Maximum Value = 3

14. What will be the output of the following Python code?

import random

List=["Delhi","Mumbai","Chennai","Kolkata"]

for y in range(4):
      x = random.randint(1,3)
      print(List[x],end="#")

a. Delhi#Mumbai#Chennai#Kolkata#
b. Mumbai#Chennai#Kolkata#Mumbai#
c. Mumbai# Mumbai #Mumbai # Delhi#
d. Mumbai# Mumbai #Chennai # Mumbai

ANSWER:

b. Mumbai#Chennai#Kolkata#Mumbai#

15. What possible output(s) is/are expected to be displayed on the screen at the time of execution of the program from the following code?
Also, specify the maximum and minimum value that can be assigned to the variable R when K is assigned value as 2. [CBSE Board 2021]

import random
Signal = [ 'Stop', 'Wait', 'Go' ]
for K in range(2, 0, -1):
      R = randrange(K)
      print (Signal[R], end = ' # ')

(a) Stop # Wait # Go #
(b) Wait # Stop #
(c) Go # Wait #
(d) Go # Stop #

ANSWER:

(b) Wait # Stop #

When K is assigned value as 2

Maximum value of R = 1

Minimum value of R = 0

16. What is possible output(s) expected to be displayed on screen at the time of execution of the program from the following code ? Also specify the minimum and maximum values that can be assigned to the variable End. [CBSE Board 2020]

import random
Colours = ["VIOLET","INDIGO","BLUE","GREEN", "YELLOW","ORANGE","RED"]
End = randrange(2)+3
Begin = randrange(End)+1
for i in range(Begin,End):
        print(Colours[i],end="&")

(i) INDIGO&BLUE&GREEN&
(ii) VIOLET&INDIGO&BLUE&
(iii) BLUE&GREEN&YELLOW&
(iv) GREEN&YELLOW&ORANGE&

ANSWER:

Possible Outputs:-

(i) INDIGO&BLUE&GREEN& 
(iii) BLUE&GREEN&YELLOW& 


Minimum Value of End = 3
Maximum value of End = 4

17. What is possible output(s) expected to be displayed on the screen at the time of execution of the program from the following code? Also, specify the minimum values that can be assigned to the variable BEGIN and LAST. [CBSE Board 2019]

import random

VALUES=[10,20,30,40,50,60,70,80]

BEGIN = random.randint(1, 3)
LAST = random.randint(BEGIN, 4)

for I in range(BEGIN, LAST+1):
        print(VALUES[I], "-",)

(i) 30 – 40 – 50 –
(ii) 10 – 20 – 30 – 40 –
(iii) 30 – 40 – 50 – 60 –
(iv) 30 – 40 – 50 – 60 – 70 –

ANSWER:

Possible Outputs:-

(i) 30 - 40 - 50 - 


Minimum Value of BEGIN = 1
Minimum value of LAST = 1

18. What is possible output(s) expected to be displayed on the screen at the time of execution of the program from the following code? Also, specify the minimum values that can be assigned to the variable Start and End. [CBSE Board 2019 Compartment]

import random

VAL=[80, 70, 60, 50, 40, 30, 20, 10]

Start = random.randint(1, 3)
End = random.randint(Start, 4)

for I in range(Start, End+1):
         print(VAL[I], "*", )

(i) 40 * 30 * 20 * 10 *
(ii) 70 * 60 * 50 * 40 * 30 *
(iii) 50 * 40 * 30 *
(iv) 60 * 50 * 40 *

ANSWER:

Possible Outputs:-

(iv) 60 * 50 * 40 * 


Minimum Value of Start = 1
Minimum value of End = 1

19. What is possible output(s) expected to be displayed on the screen at the time of execution of the program from the following code? Also, specify the maximum values that can be assigned to the variable BEGIN and LAST. [CBSE Board 2018]

import random

POINTS = [30,50,20,40,45];

BEGIN = random.randint(1, 3)
LAST = random.randint(2, 4)

for C in range(BEGIN, LAST+1):
       print(POINTS[C], "#",)

(i) 20#50#30#
(ii) 20#40#45#
(iii) 50#20#40#
(iv) 30#50#20#

ANSWER:

Possible Outputs:-

(iii) 50#20#40#


Maximum Value of BEGIN = 3
Maximum value of LAST = 4

20. What are the possible output(s) executed from the following code? Also specify the maximum and minimum values that can be assigned to the variable NUM. [CBSE Board 2017 ]

import random

NAV = ["LEFT", "FRONT", "RIGHT", "BACK"]

NUM = random.randint(1,3)
NAVG = ""

for C in range (NUM, 1, -1):
        NAVG = NAVG + NAV[C]

print(NAVG)

(i) BACKRIGHT
(ii) BACKRIGHTFRONT
(iii) BACK
(iv) LEFTFRONTRIGHT

ANSWER:

Possible Outputs:-

(i) BACKRIGHT


Maximum Value of NUM = 3
Minimum value of NUM = 1

21. What are the possible output(s) executed from the following code? Also specify the maximum and minimum values that can be assigned to the variable NUM. [CBSE Board 2017 ]

import random

NAV = ["LEFT", "FRONT", "RIGHT", "BACK"]

NUM = random.randint(1, 3)
NAVG = ""

for C in range (NUM, 1, -1):
        NAVG = NAVG + NAV[C]

print(NAVG)

(i) BACKRIGHT
(ii) BACKRIGHTFRONT
(iii) BACK
(iv) LEFTFRONTRIGHT

ANSWER:

Possible Outputs:-

(i) BACKRIGHT


Maximum Value of NUM = 3
Minimum value of NUM = 1

22. What possible output(s) are expected to be displayed on the screen at the time of execution of the following program : [CBSE 2023]

import random

M- (5, 10, 15, 20, 25, 30] 
for i in range (1, 3) : 
       first = random. randint (2, 5) - 1 
       sec = random. randint (3, 6) - 2 
       third=random. randint (1, 4 ) 

print (M[first] , M[ sec], M[third] , sep = "#")

(i) 10#25#15
20#25#25
(ii) 5# 25#20
25#20#15
(iii) 30#20#20
20#25#25
(iv) 10#15#25#
15#20#10#

ANSWER: