Question 1

Regular expressions facilitate text substitution operations. However, regular expressions are not able to accommodate differences in case.

Accepted Answer

A) True 
 B)False

Question 2

By default, regular expression matches are case sensitive, although you can override this behavior.

Accepted Answer

A) True 
 B)False

Question 3

The ^ character is used in a regular expression to look for a match at the end of a line.

Accepted Answer

A) True 
 B)False

Question 4

A regular expression is ____.

Accepted Answer

A)  A pattern used to identify matching character data 
B)  A mechanism that facilitates the collection of input 
C)  A special type of variable, array, or hash that facilitates pattern matching and string substitution 
D)  None of the above

Question 5

A metacharacter is a character that alters the way a pattern match occurs.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following regular expression metacharacters looks for a match at the end of a string?

Accepted Answer

A)  \A 
B)  \Z 
C)  \w 
D)  \d

Question 7

Which of the following String methods can be used to replace all instances of a search pattern within a string?

Accepted Answer

A)  sub 
B)  gsub 
C)  rsub 
D)  None of the above

Question 8

The operator is the "equals to" operator in a regular expression.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following regular expression metacharacters matches any white space?

Accepted Answer

A)  \W 
B)  \w 
C)  \S 
D)  \s

Question 10

While you can certainly create scripts based on the assumption that the data received will always be valid, you would do so at your own peril. In most cases, you will want to build data validation logic into your own scripts, rejecting any data that is not the proper format.

Accepted Answer

A) True 
 B)False

Question 11

Regular expressions are not limited to data validation. Regular expressions can also be used to search for data within strings and to perform string substitutions.

Accepted Answer

A) True 
 B)False

Question 12

A ____ is a character that alters the way a pattern match occurs.

Accepted Answer

A)  Character class 
B)  Pattern class 
C)  Metacharacter 
D)  Metaword

Question 13

The result of the following example evaluates as true. if "Welcome to New York Harbor, USA." =~ /USA/ then puts "Welcome to America!" end

Accepted Answer

A) True 
 B)False

Question 14

The * metacharacter modifier is used to set up pattern matches of zero or more instances of the preceding character.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following regular expression metacharacters matches any numeric character?

Accepted Answer

A)  \d 
B)  \D 
C)  \s 
D)  \S

Question 16

The $ character is used in a regular expression to set up a match with any character.

Accepted Answer

A) True 
 B)False

Question 17

By default, if a character included in a regular expression pattern matches a character in the source string, true is returned.

Accepted Answer

A) True 
 B)False

Question 18

The \s character is used in a regular expression to set up a match based on white space.

Accepted Answer

A) True 
 B)False

Question 19

You can set up a regular expression pattern to look for possible matches using the | character to separate each possible match.

Accepted Answer

A) True 
 B)False

Question 20

You can replace all instances of a search pattern using the String class's gsub method.

Accepted Answer

A) True 
 B)False

Exam 7: Working With Regular Expressions

Regular expressions facilitate text substitution operations. However, regular expressions are not able to accommodate differences in case.

By default, regular expression matches are case sensitive, although you can override this behavior.

The ^ character is used in a regular expression to look for a match at the end of a line.

A regular expression is ____.

A metacharacter is a character that alters the way a pattern match occurs.

Which of the following regular expression metacharacters looks for a match at the end of a string?

Which of the following String methods can be used to replace all instances of a search pattern within a string?

The operator is the "equals to" operator in a regular expression.

Which of the following regular expression metacharacters matches any white space?

While you can certainly create scripts based on the assumption that the data received will always be valid, you would do so at your own peril. In most cases, you will want to build data validation logic into your own scripts, rejecting any data that is not the proper format.

Regular expressions are not limited to data validation. Regular expressions can also be used to search for data within strings and to perform string substitutions.

A ____ is a character that alters the way a pattern match occurs.

The result of the following example evaluates as true. if "Welcome to New York Harbor, USA." =~ /USA/ then puts "Welcome to America!" end

The * metacharacter modifier is used to set up pattern matches of zero or more instances of the preceding character.

Which of the following regular expression metacharacters matches any numeric character?

The $ character is used in a regular expression to set up a match with any character.

By default, if a character included in a regular expression pattern matches a character in the source string, true is returned.

The \s character is used in a regular expression to set up a match based on white space.

You can set up a regular expression pattern to look for possible matches using the | character to separate each possible match.

You can replace all instances of a search pattern using the String class's gsub method.