41. What will be the output of the following Python code?
re.match(‘sp(.*)am’, ‘spam’)
a) <_sre.SRE_Match object; span=(1, 4), match=’spam’>
b) <_sre.SRE_Match object; span=(0, 4), match=’spam’>
c) No output
d) Error
Check Answer
Answer: b
The code shown above demonstrates the function re.match, combined with a special character. The output of the code shown is: <_sre.SRE_Match object; span=(0, 4), match=’spam’>
42. Which of the following special characters represents a comment (that is, the contents of the parenthesis are simply ignores)?
a) (?:…)
b) (?=…)
c) (?!…)
d) (?#…)
Check Answer
Answer: d
The special character (?#…) represent a comment, that is, the contents of the parenthesis are simply ignored.
43. Which of the codes shown below results in a match?
a) re.match(‘George(?=Washington)’, ‘George Washington’)
b) re.match(‘George(?=Washington)’, ‘George’)
c) re.match(‘George(?=Washington)’, ‘GeorgeWashington’)
d) re.match(‘George(?=Washington)’, ‘Georgewashington’)
Check Answer
Answer: c
The code shown above demonstrates the use of the function re.match, along with the special character ?=. This results in a match only when ‘George’ is immediately followed by ‘Washington’. Also, we have not used the module to ignore case. Hence the match is case-sensitive. Therefore the only option which results in a match is:
re.match(‘George(?=Washington)’, ‘GeorgeWashington’)
44. What will be the output of the following Python code?
re.split(r'(a)(t)’, ‘Maths is a difficult subject’)
a) [‘M a t h s i s a d i f f i c u l t s u b j e c t’]
b) [‘Maths’, ‘is’, ‘a’, ‘difficult’, ‘subject’]
c) ‘Maths is a difficult subject’
d) [‘M’, ‘a’, ‘t’, ‘hs is a difficult subject’]
Check Answer
Answer: d
The code shown above demonstrates the use of the function re.match. The first argument of this function specifies the pattern. Since the pattern contains groups, those groups are incorporated in the resultant list as well. Hence the output of the code shown above is [‘M’, ‘a’, ‘t’, ‘hs is a difficult subject’].
45. The output of the following two Python codes are the same.
CODE 1
>>> re.split(r'(a)(t)’, ‘The night sky’)
CODE 2
>>> re.split(r’\s+’, ‘The night sky’)
a) True
b) False
Check Answer
Answer: b
The output of the first code is: [‘The night sky’] whereas the output of the second code is:[‘The’, ‘night’, ‘sky’]. Clearly, the outputs of the two codes are different. Hence the statement given above is a false one.
46. What will be the output of the following Python code?
import re
s = ‘abc123 xyz666 lmn-11 def77’
re.sub(r’\b([a-z]+)(\d+)’, r’\2\1:’, s)
a) ‘123abc: 666xyz: lmn-11 77def:’
b) ‘77def: lmn-11: 666xyz: 123abc’
c) ‘abc123:’, ‘xyz666:’, ‘lmn-11:’, ‘def77:’
d) ‘abc123: xyz666: lmn-11: def77’
Check Answer
Answer: a
The function re.sub returns a string produced by replacing every non overlapping occurrence of the first argument with the second argument in the third argument. Hence the output is: ‘123abc: 666xyz: lmn-11 77def:’
47. What will be the output of the following Python code?
re.subn(‘A’, ‘X’, ‘AAAAAA’, count=4)
a) ‘XXXXAA, 4’
b) (‘AAAAAA’, 4)
c) (‘XXXXAA’, 4)
d) ‘AAAAAA, 4’
Check Answer
Answer: c
The line of code shown above demonstrates the function re.subn. This function is very similar to the function re.sub except that in the former, a tuple is returned instead of a string. The output of the code shown above is: (‘XXXXAA’, 4).
48. What will be the output of the following Python code?
n = re.sub(r’\w+’, ‘Hello’, ‘Cats and dogs’)
a)
Hello
Hello
Hello
b) ‘Hello Hello Hello’
c) [‘Hello’, ‘Hello’, ‘Hello’]
d) (‘Hello’, ‘Hello’, ‘Hello’)
Check Answer
Answer: b
The code shown above demonstrates the function re.sub. Since the string given as an argument consists of three words. The output of the code is: ‘Hello Hello Hello’. Had the string consisted of 4 words, the output would be: ‘Hello Hello Hello Hello’
49. What will be the output of the following Python code?
w = re.compile(‘[A-Za-z]+’)
w.findall(‘It will rain today’)
a) ‘It will rain today’
b) (‘It will rain today’)
c) [‘It will rain today’]
d) [‘It’, ‘will’, ‘rain’, ‘today’]
Check Answer
Answer: d
The code shown above demonstrates the function re.findall. Since all the words in the string match the criteria, the output of the code is: [‘It’, ‘will’, ‘rain’, ‘today’].
50. In the functions re.search.start(group) and re.search.end(group), if the argument groups not specified, it defaults to __________
a) Zero
b) None
c) One
d) Error
Check Answer
Answer: a
In the functions re.search.start(group) and re.search.end(group), if the argument groups not specified, it defaults to Zero.
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Python Interview Questions (MCQs)
We have divided these Python Questions and Answers into various parts based on the topics. Open the Topic of your choice and Practice these MCQs.
