1. What will be the output of the following Python code snippet?
k = [print(i) for i in my_string if i not in "aeiou"]
A) prints all the vowels in my_string
B) prints all the consonants in my_string
C) prints all characters of my_string that aren’t vowels
D) prints only on executing print(k)
Answer: prints all characters of my_string that aren’t vowels
Explanation: print(i) is executed if the given character is not a vowel.
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2. What will be the output of the following Python code snippet?
k = [print(i) for i in my_string if i not in "aeiou"]
print(k)
A) all characters of my_string that aren’t vowels
B) a list of Nones
C) List of Trues
D) List of Falses
Answer: a list of Nones
Explanation: print() returns None.
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3. What will be the output of the following Python code snippet?
my_string = "hello world"
k = [(i.upper(), len(i)) for i in my_string]
print(k)
A) [(‘HELLO’, 5), (‘WORLD’, 5)]
B) [(‘H’, 1), (‘E’, 1), (‘L’, 1), (‘L’, 1), (‘O’, 1), (‘ ‘, 1), (‘W’, 1), (‘O’, 1), (‘R’, 1), (‘L’, 1), (‘D’, 1)]
C) [(‘HELLO WORLD’, 11)]
D) none of the mentioned
Answer: [(‘H’, 1), (‘E’, 1), (‘L’, 1), (‘L’, 1), (‘O’, 1), (‘ ‘, 1), (‘W’, 1), (‘O’, 1), (‘R’, 1), (‘L’, 1), (‘D’, 1)]
Explanation: We are iterating over each letter in the string.
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4. What will be the output of the following Python code snippet?
x = [i**+1 for i in range(3)]; print(x);
A) [0, 1, 2]
B) [1, 2, 5]
C) error, **+ is not a valid operator
D) error, ‘;’ is not allowed
Answer: [0, 1, 2]
Explanation: **+1 is evaluated as (i)**(+1).
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5. What will be the output of the following Python code snippet?
print([i.lower() for i in "HELLO"])
A) [‘h’, ‘e’, ‘l’, ‘l’, ‘o’]
B) ‘hello’
C) [‘hello’]
D) hello
Answer: [‘h’, ‘e’, ‘l’, ‘l’, ‘o’]
Explanation: We are iterating over each letter in the string.
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6. What will be the output of the following Python code snippet?
print([i+j for i in "abc" for j in "def"])
A) [‘da’, ‘ea’, ‘fa’, ‘db’, ‘eb’, ‘fb’, ‘dc’, ‘ec’, ‘fc’]
B) [[‘ad’, ‘bd’, ‘cd’], [‘ae’, ‘be’, ‘ce’], [‘af’, ‘bf’, ‘cf’]]
C) [[‘da’, ‘db’, ‘dc’], [‘ea’, ‘eb’, ‘ec’], [‘fa’, ‘fb’, ‘fc’]]
D) [‘ad’, ‘ae’, ‘af’, ‘bd’, ‘be’, ‘bf’, ‘cd’, ‘ce’, ‘cf’]
Answer: [‘ad’, ‘ae’, ‘af’, ‘bd’, ‘be’, ‘bf’, ‘cd’, ‘ce’, ‘cf’]
Explanation: Explanation: If it were to be executed as a nested for loop, i would be the outer loop and j the inner loop.
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7. What will be the output of the following Python code snippet?
print([[i+j for i in "abc"] for j in "def"])
A) [‘da’, ‘ea’, ‘fa’, ‘db’, ‘eb’, ‘fb’, ‘dc’, ‘ec’, ‘fc’]
B) [[‘ad’, ‘bd’, ‘cd’], [‘ae’, ‘be’, ‘ce’], [‘af’, ‘bf’, ‘cf’]]
C) [[‘da’, ‘db’, ‘dc’], [‘ea’, ‘eb’, ‘ec’], [‘fa’, ‘fb’, ‘fc’]]
D) [‘ad’, ‘ae’, ‘af’, ‘bd’, ‘be’, ‘bf’, ‘cd’, ‘ce’, ‘cf’]
Answer: [[‘ad’, ‘bd’, ‘cd’], [‘ae’, ‘be’, ‘ce’], [‘af’, ‘bf’, ‘cf’]]
Explanation: The inner list is generated once for each value of j.
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8. What will be the output of the following Python code snippet?
print([if i%2==0: i; else: i+1; for i in range(4)])
A) [0, 2, 2, 4]
B) [1, 1, 3, 3]
C) error
D) none of the mentioned
Answer: error
Explanation: Syntax error.
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9. Which of the following is the same as list(map(lambda x: x**-1, [1, 2, 3]))?
A) [x**-1 for x in [(1, 2, 3)]]
B) [1/x for x in [(1, 2, 3)]]
C) error
D) [1/x for x in (1, 2, 3)]
Answer: [1/x for x in (1, 2, 3)]
Explanation: x**-1 is evaluated as (x)**(-1).
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