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Interview questions from top companies, mapped to the exact round they show up in. Prep for what you will actually face.

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Online AssessmentDSA / CodingMachine CodingLow-Level Design

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The Loop aggregates publicly shared interview experiences and curated commonly-asked questions, each labeled with its source. Not affiliated with any company listed.

MIT · © 2026

← Unity

Staff+ Backend at Unity

BackendStaff+Offer◆ Commonly asked· 2025

A staff backend loop. Coding-heavy early, design and behavioral later.

The loop · 5 rounds

01

Round 01 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Reverse nodes in k-group.
    Staff+Hard◆ Commonly asked
    #linked-list
    PracticeLeetCode↗GeeksforGeeks↗
  • Binary tree level order traversal.
    Staff+Medium◆ Commonly asked
    #tree#bfs
    PracticeLeetCode↗GeeksforGeeks↗
  • Group anagrams from a list of strings.
    Staff+Medium◆ Commonly asked
    #hashmap#string
    PracticeLeetCode↗GeeksforGeeks↗
02

Round 02 · 1 question

Low-Level Design

Object-oriented / low-level design of a focused module.

  • Design a food-delivery order/dispatch model.
    Staff+Hard◆ Commonly asked
    #oop#state-machine
    PracticeGeeksforGeeks↗Search↗
03

Round 03 · 2 questions

System Design

High-level architecture of a large-scale system.

  • Design a job scheduler / cron service.
    Staff+Medium◆ Commonly asked
    #queues#scheduling
    PracticeGeeksforGeeks↗Search↗
  • Design a distributed unique ID generator.
    Staff+Medium◆ Commonly asked
    #snowflake#distributed
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 1 question

Hiring Manager

Scope, ownership, and role-fit discussion with the manager.

  • Walk me through a technical trade-off you regret.
    Staff+◆ Commonly asked
    #judgment
05

Round 05 · 2 questions

Behavioral / HR

Values, collaboration, and past-experience (STAR) questions.

  • Describe a time you improved a process or tool for your team.
    Staff+◆ Commonly asked
    #ownership#star
  • Tell me about a time you had to learn something quickly.
    Staff+◆ Commonly asked
    #learning#star

◆ This experience is composed from commonly reported questions for this role and level. Real, individually-shared interviews will be layered in over time.