Space-Efficient Palindrome Check | Dataford Interview Questions

Aezion services may need to validate mirrored string identifiers before processing them. Write a function that determines whether a given string is a palindrome while using constant auxiliary space.

A string is a palindrome when it reads identically from left to right and right to left. Treat characters as case-sensitive, and compare every character exactly as provided. Do not remove whitespace or punctuation.

Formal Specification

Implement is_palindrome(s), where s is a string. Return True if s is a palindrome and False otherwise. The function must not create a reversed copy or another data structure proportional to the input length.

Constraints

0 <= len(s) <= 10^5
s contains standard Unicode characters
Comparisons are case-sensitive
Spaces and punctuation are significant

Function Signature

def is_palindrome(s):

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