Check String Rotation | Dataford Interview Questions

Datavant identity resolution workflows may compare normalized identifier strings received in different segment orders. Given two strings, determine whether the second string is a rotation of the first.

A string b is a rotation of string a if b can be produced by moving a prefix of a to its end. The rotation may move zero characters, so every string is a rotation of itself.

Formal Specification

Implement is_rotation(a, b).

Input: Two strings a and b, containing lowercase English letters and digits.
Output: Return True if b is a rotation of a; otherwise, return False.

Constraints

0 <= len(a), len(b) <= 10^5
Strings contain only lowercase English letters and digits
Matching is case-sensitive
An empty string is a rotation only of another empty string

Function Signature

def is_rotation(a, b):

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