Regular expression (Regex)

Question 1

What is a regular expression

Answer 1

Patterns used to identify a specific set of strings

Question 2

What does () mean

Answer 2

Used to identify groups

Question 3

What does * mean

Answer 3

Means 0 or more

Question 4

What does + mean

Answer 4

Means 1 or more

Question 5

What does ? mean

Answer 5

Means one or zero

Question 6

What does | mean

Answer 6

Any alternatives

Question 7

How can a language be regular

Answer 7

If it can be represented as a regular expression or FSM