Python List Comprehension Test

1. What will be the output of the following Python code snippet?

print([i.lower() for i in "HELLO"])

'hello'

['h', 'e', 'l', 'l', 'o']

hello

['hello']

2. What is the output of print(k) in the following Python code snippet?

k = [print(i) for i in my_string if i not in "aeiou"]
print(k)

list of Trues

a list of Nones

all characters of my_string that aren't vowels

list of Falses

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)

none of the mentioned

[('HELLO', 5), ('WORLD', 5)]

[('HELLO WORLD', 11)]

[('H', 1), ('E', 1), ('L', 1), ('L', 1), ('O', 1), (' ', 1), ('W', 1), ('O', 1), ('R', 1), ('L', 1), ('D', 1)]

4. What will be the output of the following Python code snippet?

k = [print(i) for i in my_string if i not in "aeiou"]

prints only on executing print(k)

prints all characters of my_string that aren't vowels

prints all the consonants in my_string

prints all the vowels in my_string

5. What will be the output of the following Python code snippet?

x = [i**+1 for i in range(3)]; print(x);

[1, 2, 5]

error, ';' is not allowed

error, **+ is not a valid operator

[0, 1, 2]

6. What will be the output of the following Python code snippet?

print([[i+j for i in "abc"] for j in "def"])

['ad', 'ae', 'af', 'bd', 'be', 'bf', 'cd', 'ce', 'cf']

[['da', 'db', 'dc'], ['ea', 'eb', 'ec'], ['fa', 'fb', 'fc']]

['da', 'ea', 'fa', 'db', 'eb', 'fb', 'dc', 'ec', 'fc']

[['ad', 'bd', 'cd'], ['ae', 'be', 'ce'], ['af', 'bf', 'cf']]

7. Which of the following is the correct expansion of list_1 = [expr(i) for i in list_0 if func(i)]?

none of the mentioned

list_1 = []
for i in list_0:
    if func(i):
        list_1.append(expr(i))

for i in list_0:
    if func(i):
        list_1.append(expr(i))

list_1 = []
for i in list_0:
    if func(i):
        list_1.append(i)

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)])

[1, 1, 3, 3]

error

[0, 2, 2, 4]

none of the mentioned

9. What will be the output of the following Python code snippet?

print([i+j for i in "abc" for j in "def"])

['da', 'ea', 'fa', 'db', 'eb', 'fb', 'dc', 'ec', 'fc']

['ad', 'ae', 'af', 'bd', 'be', 'bf', 'cd', 'ce', 'cf']

[['ad', 'bd', 'cd'], ['ae', 'be', 'ce'], ['af', 'bf', 'cf']]

[['da', 'db', 'dc'], ['ea', 'eb', 'ec'], ['fa', 'fb', 'fc']]

10. Which of the following is the same as list(map(lambda x: x**-1, [1, 2, 3]))?

[1/x for x in [(1, 2, 3)]]

error

[x**-1 for x in [(1, 2, 3)]]

[1/x for x in (1, 2, 3)]