715.4 Use Simple Regular Expressions (weight: 2) BSD-SPECIALIST Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   What is the primary purpose of a regular expression?

   • ATo compress files to save disk space
   • BTo define a pattern that describes a set of text strings
   • CTo encrypt data so it cannot be read without a key
   • DTo compile source code into an executable program
   Reveal Solution Discussion Select an answer first
2. 2foundation · easy

   Which command-line tool is commonly used to apply a regular expression to filter lines of text from a file or command output?

   • Aecho
   • Bgrep
   • Ccat
   • Dls
   Reveal Solution Discussion Select an answer first
4. 3foundation · easy

   In a regular expression, what does the caret (^) do when it appears at the beginning of a pattern?

   • AIt matches zero or more of the preceding character
   • BIt escapes the next character
   • CIt matches any character
   • DIt anchors the match to the beginning of the line
   Reveal Solution Discussion Select an answer first
5. 4foundation · easy

   In a regular expression, what does the pattern 'abc' match?

   • AThe string 'a' followed by any character followed by 'c'
   • BThe letters 'a', 'b', and 'c' in any order
   • CThe exact string 'abc'
   • DAny three-letter word
   Reveal Solution Discussion Select an answer first
6. 5foundation · easy

   What does the regular expression [^0-9] match?

   • AAny digit
   • BA digit at the end of a line
   • CAny character that is not a digit
   • DThe start of a line followed by a digit
   Reveal Solution Discussion Select an answer first