Job offersCompaniesTestsBlogI'm an employerSign upLog in
fr
fr
Home>IT Tests>Questions>RegEx

21 interview questions on RegExfor developers (2025)

Test your technical skills before an interview of RegEx with 21 corrected questions. Beginner, Intermediate or Expert level.

or
Technology
Profession
Test
Sort by
Newest
Most popular
Last review
Filter by
Published
3812
To review
37
21 questions
Medium
5 votes186 runs2 comments

Find all the strings that match the regular expression: `/abracadabra{2,4}/gmi`

Back-end developer
RegEx
pattern
Nick LAM YEE MANat Mar 28, 2023
Easy
4 votes209 runs0 comment

Which of the following is not a regular expression?

Back-end developer
RegEx
characters
Nick LAM YEE MANat Mar 28, 2023
Expert
3 votes159 runs1 comment

Write a regular expression to extract a file name from a path, except if the file is a .html file

Back-end developer
RegEx
file
Nick LAM YEE MANat Mar 28, 2023
Medium
2 votes191 runs0 comment

Write a RegEx that has the same behavior as trim (JS) or strip(Python)

Back-end developer
RegEx
functions
Nick LAM YEE MANat Mar 28, 2023
Easy
2 votes189 runs0 comment

Write a regular expression that matches a character that repeats exactly 6 times.

Back-end developer
RegEx
character
Nick LAM YEE MANat May 16, 2023
Medium
2 votes183 runs0 comment

Write a regular expression that matches anything that looks like an HTML tag.

Back-end developer
RegEx
html
Nick LAM YEE MANat Mar 28, 2023
Medium
2 votes167 runs0 comment

Write a RegEx that will only find the word 'test' in the sentence 'I write a testimonial about this test'

Back-end developer
RegEx
pattern
Nick LAM YEE MANat Mar 28, 2023
Easy
2 votes164 runs0 comment

Find the intruder in the following regex: `^[a-zA-Z0-9_-]+$`

Back-end developer
RegEx
pattern
Nick LAM YEE MANat Mar 28, 2023
Expert
2 votes159 runs
1 comment

Count the number of matches of the RegEx `a*` in the sentence: `I went to my grandparent house`

Back-end developer
RegEx
string
Nick LAM YEE MANat Mar 28, 2023
Hard
1 vote187 runs0 comment

Write a regular expression that matches any number in a string

Back-end developer
RegEx
pattern
Nick LAM YEE MANat Mar 28, 2023
Medium
1 vote176 runs0 comment

Write a regular expression to match the characters . and ?

Back-end developer
RegEx
characters
Nick LAM YEE MANat Mar 28, 2023
Medium
1 vote171 runs0 comment

Write a regular expression that replaces all tags without content with self-closing tags

Back-end developer
RegEx
tags
Nick LAM YEE MANat Mar 28, 2023
Easy
1 vote164 runs0 comment

Find all the occurrences of the substring 'abracadabra' in the string 'abracadabraabracadabraabracadabra'

Back-end developer
RegEx
quantifiers
Nick LAM YEE MANat Mar 28, 2023
Medium
1 vote162 runs0 comment

Write a regular expression that matches a valid email address

Back-end developer
RegEx
email
Nick LAM YEE MANat Mar 28, 2023
Hard
1 vote159 runs0 comment

What does this RegEx do : `/(^\w+)(?=\.\w+)/old_$1/gm`

Back-end developer
RegEx
file
Nick LAM YEE MANat Mar 28, 2023
Easy
1 vote154 runs0 comment

What does the RegEx `/[abc]/` match

Back-end developer
RegEx
regular expressions
character classes
Nick LAM YEE MANat Mar 28, 2023
Medium
1 vote133 runs0 comment

Which RegEx(s) can be used to verify that a password meets these criteria: - at least 1 (one) lowercase letter - at least 1 (one) uppercase letter - at least 1 (one) number - at least 8 (eight) characters

Back-end developer
RegEx
password
Nick LAM YEE MANat Mar 28, 2023
Expert
0 vote203 runs
2 comments

Write a regular expression to match 'i{,4}' in a string

Back-end developer
RegEx
pattern
Nick LAM YEE MANat Mar 28, 2023
Hard
0 vote158 runs1 comment

Which letters will be match by the RegEx `/\x42/gmi`

Back-end developer
RegEx
characters
Nick LAM YEE MANat Feb 6, 2024
Medium
0 vote86 runs0 comment

Write a regular expression that matches anything that is not `a`, `b` or `c`

Back-end developer
RegEx
character classes
Nick LAM YEE MANat Mar 28, 2023