First non repeating character in a string

[Tanishq200 (Tanishq Kinra)]

in first non repeating character in a string ,isn’t DLL a better approach?

[Yash_N (Yash Narang)]

@Tanishq200
DLL is a better approach but from implementation point of view queue is better. Using DLL u can get ur answer in O(1) at each step of insertion of character.

hope dis helps.