Step-by-Step Explanation:
Understand the QuestionRequirements:The goal is to use a regular expression (regex) to match software versions 10.0 through 10.3, but exclude version 10.4.
Review Regex Syntax:
[ ] indicates a character set (matches any one character in the set).
[0-3] matches any digit between 0 and 3.
\. escapes the period (.) so it matches a literal period instead of acting as a wildcard.
( ) groups parts of the regex together.
Analyze Each Option:
Option A: Reader(*)[1][0].[0-4:
Incorrect. The use of (*) is not valid syntax in this context and [0-4 is incomplete or misformatted.
Option B: Reader[11[01X.f0-3'
Incorrect. This is an invalid regex syntax, mixing character sets and mismatched brackets.
Option C: Reader( )[1][0].[0-3:
Correct. This regex is valid and matches "Reader 10.0", "Reader 10.1", "Reader 10.2", and "Reader 10.3" while excluding "Reader 10.4".
Breakdown:
Reader: Matches the text "Reader".
[1][0]: Matches "10" as a combination of two characters.
\.: Matches the literal period.
[0-3]: Matches any single digit between 0 and 3.
Option D: Reader( )[1][0] X.[1-3:
Incorrect. The syntax X.[1-3 is invalid, and this does not match the required versions.
Conclusion:The regex in Option C correctly identifies all affected versions (10.0, 10.1, 10.2, 10.3) while excluding the unaffected version (10.4).
References:
CompTIA Advanced Security Practitioner (CASP+) Study Guide, Chapter on Vulnerability Management.
CompTIA CASP+ Exam Objectives: "Analyze risks associated with new vulnerabilities." Regular Expressions Documentation from CASP+ Official Reference Materials.
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