One By Zero

Role: Software Development Engineer

College: Not Specified

Interview Date: October 10, 2025

Interview Type: Full-Time

Result: Rejected

Difficulty: Hard

Rounds: 1 round

Topics Asked: High-Level Design, Data Structures, Algorithms

Experience:

This interview for OneByZero.ai focused on High-Level Design (HLD) and Data Structures & Algorithms (DSA) and consisted of a single technical round lasting 60 minutes.

HLD Round: The first part of the interview involved a High-Level Design question. The candidate was asked to design a social media page similar to a Facebook page, specifically allowing users to create pages and followers to comment on posts. The candidate mentioned this was their first HLD interview and they were not adequately prepared, leading to an unsatisfactory solution despite attempting it.

DSA Round: Following the HLD discussion, the interview moved to Data Structures & Algorithms. The question was to find the largest substring with non-repeating characters. The interviewer emphasized that the code should pass all test cases, and the candidate managed to implement it correctly in a single attempt.

Overall Experience: The candidate was not selected, primarily due to their performance in the HLD section. They described the overall difficulty as challenging, particularly the HLD aspect.