Output of Python Programs | Set 18 (List and Tuples)
1) What is the output of the following program?
PYTHON
L = list ( '123456' )
L[ 0 ] = L[ 5 ] = 0
L[ 3 ] = L[ - 2 ]
print (L)
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a) [0, ‘2’, ‘3’, ‘4’, ‘5’, 0]
b) [‘6’, ‘2’, ‘3’, ‘5’, ‘5’, ‘6’]
c) [‘0’, ‘2’, ‘3’, ‘5’, ‘5’, ‘0’]
d) [0, ‘2’, ‘3’, ‘5’, ‘5’, 0]
Ans. (d)
Explanation: L[0] is ‘1’ and L[5] is ‘6’, both of these elements will be replaced by 0 in the List. L[3], which is 4 will be replaced L[-2] i.e. 5.
2) What is the output of the following program?
PYTHON3
T = 'geeks'
a, b, c, d, e = T
b = c = '*'
T = (a, b, c, d, e)
print (T)
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a) (‘g’, ‘*’, ‘*’, ‘k’, ‘s’)
b) (‘g’, ‘e’, ‘e’, ‘k’, ‘s’)
c) (‘geeks’, ‘*’, ‘*’)
d) KeyError
Ans. (a)
Explanation: A tuple is created as T = (‘g’, ‘e’, ‘e’, ‘k’, ‘s’), then it is unpacked into a, b, c, d and e, mapping from ‘g’ to a and ‘s’ to e. b and c which are both ‘e’ are equal to ‘*’ and then the existing tuple is replaced by packing a, b, c, d and e into a tuple T.
3) What is the value of L at the end of execution of the following program?
PYTHON3
L = [ 2e - 04 , 'a' , False , 87 ]
T = ( 6.22 , 'boy' , True , 554 )
for i in range ( len (L)):
if L[i]:
L[i] = L[i] + T[i]
else :
T[i] = L[i] + T[i]
break
|
a) [6.222e-04, ‘aboy’, True, 641]
b) [6.2202, ‘aboy’, 1, 641]
c) TypeError
d) [6.2202, ‘aboy’, False, 87]
Ans. (c)
Explanation: The for loop will run for i = 0 to i = 3, i.e. 4 times(len(L) = 4). 2e-04 is same as 0.0002, thus L[i] = 6.22 + 0.0002 = 6.2202. String addition will result in concatenation, ‘a’ + ‘boy’ = ‘aboy’. False + True is True, it’ll return the integer value of 1. As tuples are immutable, the code will end with TypeError, but elements of L will be updated.
4) What is the output of the following program?
PYTHON
T = ( 2e - 04 , True , False , 8 , 1.001 , True )
val = 0
for x in T:
val + = int (x)
print (val)
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a) 12
b) 11
c) 11.001199999999999
d) TypeError
Ans. (b)
Explanation: Integer value of 2e-04(0.0002) is 0, True holds a value 1 and False a 0, integer value of 1.001 is 1. Thus total 0 + 1 + 0 + 8 + 1 + 1 = 11.
5) Which of the options below could possibly be the output of the following program?
PYTHON
L = [ 3 , 1 , 2 , 4 ]
T = ( 'A' , 'b' , 'c' , 'd' )
L.sort()
counter = 0
for x in T:
L[counter] + = int (x)
counter + = 1
break
print (L)
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a) [66, 97, 99, 101]
b) [66, 68, 70, 72]
c) [66, 67, 68, 69]
d) ValueError
Ans. (d)
Explanation: After sort(L), L will be = [1, 2, 3, 4]. Counter = 0, L[0] i.e. 1, x = ‘A’, but Type Conversion of char ‘A’ to integer will throw error and the value cannot be stored in L[0], thus a ValueError.
Last Updated :
30 Nov, 2021
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