Q: When using regular expressions, which of the following expressions uses a reserved character that can represent any single character?
or
Q: Which of the following phrases employs a reserved character that may represent any single character when utilizing regular expressions?
- re.findall(fu$, text)
- re.findall(f*n, text)
- re.findall(^un, text)
- re.findall(f.n, text)
Explanation: The dot (.) is the expression that employs a reserved character to represent a single character in regular expressions. This character may be any character. The period (.) is known as a wildcard character because it may be used to represent any single letter other than a new line.
