CLASS 12 CBSE question

Question

What possible output(s) are expected to be displayed on screen at the time of execution of the following code? Also specify the maximum and minimum value that can be assigned to variable X.
import random
L=[10,7,21]
2 X=random.randint(1,2)
for i in range(X):
Y=random.randint(1,X)
print(L[Y],"$",end="")
(a) 10 $7$
(b) 21 $7$
(c) 21 $ 10 $
(d) 7 $

Answer 1

The list L = [10, 7, 21] has these values at these positions:

• L[0] = 10

• L[1] = 7

• L[2] = 21

X = random.randint(1,2) means X can be 1 or 2.

The loop runs X times, and each time it picks Y = random.randint(1, X).

• If X = 1, Y is always 1 → Prints 7 $

• If X = 2, Y can be 1 or 2, so different outputs are possible:

  • 7 $ 7 $

  • 7 $ 21 $

  • 21 $ 7 $

  • 21 $ 21 $

Matching with options:

(b) 21 $ 7 $ (Possible when X=2, Y=2,1)

(d) 7 $ (Possible when X=1)