Regular Expressions In Python MCQ

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

• Choose the function whose output can be: <_sre.sre_match object span="(4," match="aaaa">.</_sre.sre_match>
  ক

  &gt;&gt;&gt; re.search('aaaa', "alohaaaa", 0)

  খ

  &gt;&gt;&gt; re.match('aaaa', "alohaaaa", 0)

  গ

  &gt;&gt;&gt; re.match('aaa', "alohaaa", 0)

  ঘ

  &gt;&gt;&gt; re.search('aaa', "alohaaa", 0)
• The character Dot (that is, '.') in the default mode, matches any character other than . . . . . . . .
  ক

  caret

  খ

  ampersand

  গ

  percentage symbol

  ঘ

  newline
• The output of the following two Python codes are the same.<br><pre><code class="python">CODE 1&gt;&gt;&gt; re.split(r'(a)(t)', 'The night sky')CODE 2&gt;&gt;&gt; re.split(r'\s+', 'The night sky')</code></pre>
  ক

  True

  খ

  False
• The output of the following two Python codes are the same.<br><pre><code class="python">p = re.compile('hello')r = p.match('hello everyone')print(r.group(0)) r = re.match('hello', 'hello everyone')print(r.group(0))</code></pre>
  ক

  True

  খ

  False
• The following Python code snippet results in an error.<br><pre><code class="python">c=re.compile(r'(\d+)(\[A-Z
  ক

  +)(+)')c.groupindex</code></pre>

  খ

  <p><span>A. True

  গ

  [</span> False
• What is the output of the following code:<br><code>import re<br>pattern = re.compile(r'(d+)s(w+)')<br>result = pattern.findall('There are 5 apples and 3 oranges.')<br>print(result)</code>
  ক

  An error will occur
• 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
• How can you match the end of a string using regular expressions?
  ক

  By using the $ symbol

  খ

  By using the end keyword

  গ

  By using the last keyword

  ঘ

  By using the terminate keyword
• What is the purpose of the re.search() function in Python?
  ক

  It searches for a match anywhere in the string

  খ

  It converts strings to regular expressions

  গ

  It finds all occurrences of a pattern in a string

  ঘ

  It checks if a string contains a specific character
• How can you match either of two patterns in regular expressions using the <code>|</code> operator?
  ক

  By using `pattern1

  খ

  pattern2`

  গ

  By using pattern1,pattern2

  ঘ

  By using pattern1/pattern2
• What is the output of the following code:<br><code>import re<br>result = re.sub(r's', '-', 'This is a test.')<br>print(result)</code>
  ক

  This-is-a-test.

  খ

  An error will occur

  গ

  This--is--a--test.

  ঘ

  This- is a test.
• Choose the option wherein the two choices do not refer to the same option.
  ক

  re.I<br>re.IGNORECASE

  খ

  re.M<br>re.MULTILINE

  গ

  re.X<br>re.VERBOSE

  ঘ

  re.L<br>re.LOWERCASE
• How can you match zero or more occurrences of a pattern in regular expressions?
  ক

  By using the * symbol after the pattern

  খ

  By using the ? symbol after the pattern

  গ

  By using the + symbol after the pattern

  ঘ

  By using the # symbol after the pattern
• How can you replace a matched pattern with a new string using regular expressions in Python?
  ক

  By using the sub() function from the re module

  খ

  By using the replace() function

  গ

  By using the new() function

  ঘ

  By using the replace keyword
• 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 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
• What is the purpose of the re.MULTILINE flag in Python?
  ক

  It makes the ^ and $ characters match the beginning and end of each line

  খ

  It compiles a regular expression

  গ

  It converts strings to regular expressions

  ঘ

  It specifies a starting position
• What is the purpose of the re.sub() function in Python?
  ক

  It replaces occurrences of a pattern with a specified string

  খ

  It converts strings to regular expressions

  গ

  It searches for a match anywhere in the string

  ঘ

  It checks if a string contains a specific character
• What is a character class in regular expressions?
  ক

  A set of characters enclosed in square brackets that matches any character in the set

  খ

  A built-in function

  গ

  A specific character

  ঘ

  A special data type
• 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
• How can you specify a range of characters in a character class in regular expressions?
  ক

  By using a hyphen - between the characters

  খ

  By using a comma , between the characters

  গ

  By using a colon : between the characters

  ঘ

  By using a tilde ~ between the characters
• What is the purpose of the re.VERBOSE flag in Python?
  ক

  It allows you to write more readable and organized regular expressions

  খ

  It compiles a regular expression

  গ

  It converts strings to regular expressions

  ঘ

  It specifies a starting position
• The expression a{5} will match . . . . . . . . characters with the previous regular expression.
  ক

  5 or less

  খ

  exactly 5

  গ

  5 or more

  ঘ

  exactly 4
• Which of the following will result in an error?
  ক

  &gt;&gt;&gt; p = re.compile("d")<br>&gt;&gt;&gt; p.search("door")

  খ

  &gt;&gt;&gt; p = re.escape(‘hello’)

  গ

  &gt;&gt;&gt; p = re.subn()

  ঘ

  &gt;&gt;&gt; p = re.purge()
• What is the purpose of the re.findall() function in Python?
  ক

  It finds all occurrences of a pattern in a string and returns them as a list

  খ

  It converts strings to regular expressions

  গ

  It searches for a match anywhere in the string

  ঘ

  It checks if a string contains a specific character
• What is the output of the following code:<br><code>import re<br>result = re.search(r'd{2}', 'There are 25 apples and 3 oranges.')<br>print(result.group())</code>
  ক

  25

  খ

  An error will occur

  গ

  2

  ঘ

  5
• . . . . . . . . matches the start of the string.<br>. . . . . . . . matches the end of the string.
  ক

  '^', '$'

  খ

  '$', '^'

  গ

  '$', '?'

  ঘ

  '?', '^'
• How can you match the beginning of a string using regular expressions?
  ক

  By using the ^ symbol

  খ

  By using the start keyword

  গ

  By using the first keyword

  ঘ

  By using the initial keyword
• 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
• What is the purpose of the re.DOTALL flag in Python?
  ক

  It makes the . character match any character, including newline

  খ

  It defines a new flag

  গ

  It converts strings to regular expressions

  ঘ

  It specifies a starting position