Introduction to Data - Multiple Choice Quiz

Overview

Questions

• What does Fr[ea]nc[eh] match?

Objectives

• Test knowledge of use of regular expressions in searches

Multiple Choice Quiz

This multiple choice quiz is designed to embed the regex knowledge you learned during this module. We recommend you work through it someone after class (within a week or so). Answers are on the answer sheet.

Q1. What is the special character that matches zero or more characters

1. ^
1. #
1. *

Q2. Which of the following matches any space, tab, or newline?

1. \s
1. \b
1. $ Q3. How do you match the string Foobar appearing at the beginning of a line? 1. $Foobar
1. ^Foobar
1. #Foobar

Q4. How do you match the word Foobar appearing at the beginning of a line?

1. ^Foobar\d
1. ^Foobar\b
1. ^Foobar\w

Q5. What does the regular expression [a-z] match?

1. The characters a and z only
1. All characters between the ranges a to z and A to Z
1. All characters between the range a to z

Q6. Which of these will match the strings revolution, revolutionary, and revolutionaries?

1. revolution[a-z]?
1. revolution[a-z]*
1. revolution[a-z]+

Q7. Which of these will match the strings revolution, Revolution, and their plural variants only?

1. [rR]evolution[s]+
1. revolution[s]?
1. [rR]evolution[s]?

Q8. What regular expression matches the strings dog or cat?

1. dog|cat
1. dog,cat
1. dog | cat

Q9. What regular expression matches the whole words dog or cat?

1. \bdog|cat\b
1. \bdog\b | \bcat\b
1. \bdog\b|\bcat\b

Q10. What do we put after a character to match strings where that character appears 2 to 4 times in sequence?

1. {2,4}
1. {2-4}
1. [2,4]

Q11. The regular expression \d{4} will match what?

1. Any four character sequence?
1. Any four digit sequence?
1. The letter d four times?

Q12. If brackets are used to define a group, what would match the regular expression (,\s[0-9]{1,4}){4},\s[0-9]{1,3}\.[0-9]?

1. , 135, 1155, 915, 513, 18.8
1. , 135, 11557, 915, 513, 18.8
1. , 135, 1155, 915, 513, 188

Key Points

• Regular expressions reference guide