Regular Expressions MCQ

Test your knowledge with important Regular Expressions MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Regular Expressions MCQs at Bissoy

• Which one of the following functions is used to search a string?
  ক

  preg_match

  খ

  preg_search

  গ

  preg_find

  ঘ

  preg_found
• Say we have two compare two strings which of the following function/functions can you use?<br>1. strcmp()<br>2. strcasecmp()<br>3. strspn()<br>4. strcspn()
  ক

  1 and 2

  খ

  3 and 4

  গ

  None of the mentioned

  ঘ

  All of the mentioned
• Which among the following is/are not a metacharacter?<br>1. /a<br>2. /A<br>3. /b<br>4. /B
  ক

  Only 1

  খ

  1 and 3

  গ

  2, 3 and 4

  ঘ

  2 and 4
• Which of the following would be a potential match for the Perl-based regular expression /fo{2,4}/ ?<br>1. fol<br>2. fool<br>3. fooool<br>4. fooooool
  ক

  Only 1

  খ

  2 and 3

  গ

  1, 3 and 4

  ঘ

  1 and 4
• POSIX stands for
  ক

  Portable Operating System Interface for Unix

  খ

  Portable Operating System Interface for Linux

  গ

  Portative Operating System Interface for Unix

  ঘ

  Portative Operating System Interface for Linux
• PHP has long supported two regular expression implementations known as _______ and _______.<br>1. Perl<br>2. PEAR<br>3. Pearl<br>4. POSIX
  ক

  1 and 2

  খ

  2 and 4

  গ

  1 and 4

  ঘ

  2 and 3
• Which of the following lines of code will not show a match?
  ক

  >>> re.match(‘ab*’, ‘a’)

  খ

  >>> re.match(‘ab*’, ‘ab’)

  গ

  >>> re.match(‘ab*’, ‘abb’)

  ঘ

  >>> re.match(‘ab*’, ‘ba’)
• Which of the following functions does not accept any argument?
  ক

  re.purge

  খ

  re.compile

  গ

  re.findall

  ঘ

  re.match
• Which of the following statements regarding the output of the function re.match is incorrect?
  ক

  ‘pq*’ will match ‘pq’

  খ

  ‘pq?’ matches ‘p’

  গ

  ‘p{4}, q’ does not match ‘pppq’

  ঘ

  ‘pq+’ matches ‘p’
• Which of the following functions returns a dictionary mapping group names to group numbers?
  ক

  re.compile.group

  খ

  re.compile.groupindex

  গ

  re.compile.index

  ঘ

  re.compile.indexgroup
• In the functions re.search.start(group) and re.search.end(group), if the argument groups not specified, it defaults to __________
  ক

  Zero

  খ

  None

  গ

  One

  ঘ

  Error
• Which of the codes shown below results in a match?
  ক

  re.match(‘George(?=Washington)’, ‘George Washington’)

  খ

  re.match(‘George(?=Washington)’, ‘George’)

  গ

  re.match(‘George(?=Washington)’, ‘GeorgeWashington’)

  ঘ

  re.match(‘George(?=Washington)’, ‘Georgewashington’)
• Which of the following special characters represents a comment (that is, the contents of the parenthesis are simply ignores)?
  ক

  (?:…)

  খ

  (?=…)

  গ

  (?!…)

  ঘ

  (?#…)
• Which of the following special characters matches a pattern only at the end of the string?
  ক

  \B

  খ

  \X

  গ

  \Z

  ঘ

  \A
• The special character \B matches the empty string, but only when it is _____________
  ক

  at the beginning or end of a word

  খ

  not at the beginning or end of a word

  গ

  at the beginning of the word

  ঘ

  at the end of the word
• The function of re.match is ____________
  ক

  Error

  খ

  Matches a pattern anywhere in the string

  গ

  Matches a pattern at the end of the string

  ঘ

  Matches a pattern at the start of the string
• Which of the following pattern matching modifiers permits whitespace and comments inside the regular expression?
  ক

  re.L

  খ

  re.S

  গ

  re.U

  ঘ

  re.X
• Which of the following functions creates a Python object?
  ক

  re.compile(str)

  খ

  re.assemble(str)

  গ

  re.regex(str)

  ঘ

  re.create(str)
• The function of re.search is __________
  ক

  Matches a pattern at the start of the string

  খ

  Matches a pattern at the end of the string

  গ

  Matches a pattern from any part of a string

  ঘ

  Such a function does not exist
• The difference between the functions re.sub and re.subn is that re.sub returns a _______________ whereas re.subn returns a __________________
  ক

  string, list

  খ

  list, tuple

  গ

  string, tuple

  ঘ

  tuple, list
• The function re.error raises an exception if a particular string contains no match for the given pattern.
  ক

  True

  খ

  False
• Which of the following functions results in case insensitive matching?
  ক

  re.A

  খ

  re.U

  গ

  re.I

  ঘ

  re.X
• Which of the following functions clears the regular expression cache?
  ক

  re.sub()

  খ

  re.pos()

  গ

  re.purge()

  ঘ

  re.subn()
• Choose the function whose output can be: <_sre.SRE_Match object; span=(4, 8), match=’aaaa’>.
  ক

  >>> re.search(‘aaaa’, “alohaaaa”, 0)

  খ

  >>> re.match(‘aaaa’, “alohaaaa”, 0)

  গ

  >>> re.match(‘aaa’, “alohaaa”, 0)

  ঘ

  >>> re.search(‘aaa’, “alohaaa”, 0)
• ________ matches the start of the string. ________ matches the end of the string.
  ক

  ‘^’, ‘$’

  খ

  ‘$’, ‘^’

  গ

  ‘$’, ‘?’

  ঘ

  ‘?’, ‘^’
• The character Dot (that is, ‘.’) in the default mode, matches any character other than _____________
  ক

  caret

  খ

  ampersand

  গ

  percentage symbol

  ঘ

  newline
• What does the function re.search do?
  ক

  matches a pattern at the start of the string

  খ

  matches a pattern at any position in the string

  গ

  such a function does not exist

  ঘ

  none of the mentioned
• What does the function re.match do?
  ক

  matches a pattern at the start of the string

  খ

  matches a pattern at any position in the string

  গ

  such a function does not exist

  ঘ

  none of the mentioned
• Which of the following creates a pattern object?
  ক

  re.create(str)

  খ

  re.regex(str)

  গ

  re.compile(str)

  ঘ

  re.assemble(str)
• Which module in Python supports regular expressions?
  ক

  re

  খ

  regex

  গ

  pyregex

  ঘ

  none of the mentioned