Regular Expressions in Python

1

What is a regular expression in Python?

A) A sequence of characters that defines a search pattern B) A built-in function C) A mathematical expression D) A special data type

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Answer & Solution

Answer: Option A

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2

What is the purpose of the re.compile() function in Python?

A) It compiles a regular expression pattern into a regular expression object B) It converts strings to regular expressions C) It defines a new class D) It imports the re module

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Answer & Solution

Answer: Option A

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3

Which module in Python supports regular expressions?

A) re B) regex C) pyregex D) none of the mentioned

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Answer & Solution

Answer: Option A

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4

How can you use regular expressions in Python?

A) By using the re module B) By using the regex keyword C) By including it as a string D) By using the regx function

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Answer & Solution

Answer: Option A

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5

What does the match() function in the re module do?

A) It searches for a match only at the beginning of the string B) It converts strings to regular expressions C) It searches for a match anywhere in the string D) It checks if a string contains a specific character

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Answer & Solution

Answer: Option A

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6

What does the findall() function in the re module do?

A) It finds all occurrences of a pattern in a string and returns them as a list B) It converts strings to regular expressions C) It searches for a match anywhere in the string D) It checks if a string contains a specific character

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Answer & Solution

Answer: Option A

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7

What is the purpose of the re.IGNORECASE flag in Python?

A) It makes the pattern matching case-insensitive B) It compiles a regular expression C) It specifies a starting position D) It ignores invalid characters

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Answer & Solution

Answer: Option B

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8

What is the output of the following code:

import re
result = re.sub(r'd+', 'number', 'There are 5 apples and 3 oranges.')
print(result)

A) There are number apples and number oranges. B) An error will occur C) There are 5 apples and 3 oranges. D) There are number apples and 3 oranges.

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Answer & Solution

Answer: Option A

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9

How can you search for a specific pattern in a string using regular expressions in Python?

A) By using the search() function from the re module B) By using the find() function C) By using the locate() function D) By using the match() function

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Answer & Solution

Answer: Option A

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10

Which of the following creates a pattern object?

A) re.create(str) B) re.regex(str) C) re.compile(str) D) re.assemble(str)

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Answer & Solution

Answer: Option C

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