Quick Overview

This question evaluates proficiency in string manipulation, character frequency analysis, and asymptotic time/space complexity reasoning. It is commonly asked in the coding & algorithms domain to test practical application of basic data structures (string processing and frequency-based counting), correctness under input constraints, and the ability to design efficient, linear-time solutions rather than purely conceptual reasoning.

Solve Anagram Without Sorting

Company: Pilot

Role: Software Engineer

Category: Coding & Algorithms

Difficulty: easy

Interview Round: Technical Screen

Given two strings `s` and `t`, return `true` if `t` is an anagram of `s`, and `false` otherwise. You may **not** sort either string. An anagram uses exactly the same characters with the same frequencies, but possibly in a different order. Assume both strings contain only lowercase English letters. Examples: - `s = "listen"`, `t = "silent"` -> `true` - `s = "rat"`, `t = "car"` -> `false` Can you solve this in linear time using a hash table or frequency-count approach?

Overview: This question evaluates proficiency in string manipulation, character frequency analysis, and asymptotic time/space complexity reasoning. It is commonly asked in the coding & algorithms domain to test practical application of basic data structures (string processing and frequency-based counting), correctness under input constraints, and the ability to design efficient, linear-time solutions rather than purely conceptual reasoning.

Read the full Pilot Software Engineer interview experience this question came from

Return whether two lowercase strings are anagrams using character counts, not sorting.

Constraints

  • Inputs are Python literals matching the function signature.
  • Return a deterministic exact-match value.

Examples

Input: ('listen','silent')

Expected Output: True

Explanation: Anagrams have equal counts.

Input: ('rat','car')

Expected Output: False

Explanation: Different counts.

Hints

  1. Clarify edge cases before coding.
  2. Keep the return value deterministic.

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