Question

How do you match a query string that starts and ends with a specific letter?

Option 1: /^letter.*letter$/
Option 2: /letter.*letter/
Option 3: /^letter.*letter/
Option 4: /letter$/

Answer 1

The correct option is Option 3: /^letter.*letter/

Step-by-step explanation:

The correct option to match a query string that starts and ends with a specific letter is Option 3: /^letter.*letter/.

This regular expression uses the ^ symbol to match the start of the string and the $ symbol to match the end of the string. The .* part matches any characters in between the two specified letters. By using the ^ and $ symbols, we ensure that the specified letter is at the start and end of the string, respectively.

For example, if we want to match a query string that starts and ends with the letter 'a', we can use the regular expression /^a.*a$/. This would match strings like 'apple', 'abracadabra', and 'alpaca'.