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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.

CC BY-NC 4.0 · © 2026

← OpenAI

Senior Frontend at OpenAI

FrontendSeniorRejected◆ Commonly asked· 2024

Senior frontend interview. Fast-paced; expect follow-ups that push on depth.

The loop · 6 rounds

01

Round 01 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Find minimum in rotated sorted array.
    SeniorMedium◆ Commonly asked
    #binary-search
    PracticeLeetCode↗GeeksforGeeks↗
  • Pacific Atlantic water flow.
    SeniorMedium◆ Commonly asked
    #dfs#grid
    PracticeLeetCode↗GeeksforGeeks↗
  • Maximum depth of a binary tree.
    SeniorEasy◆ Commonly asked
    #tree#dfs
    PracticeLeetCode↗GeeksforGeeks↗
02

Round 02 · 2 questions

Machine Coding

Build a working component or service under time pressure.

  • Build an infinite-scrolling list with virtualization.
    SeniorHard◆ Commonly asked
    #react#virtualization#perf
    PracticeGeeksforGeeks↗Search↗
  • Build an accessible accordion with single/multi open.
    SeniorMedium◆ Commonly asked
    #react#a11y
    PracticeGeeksforGeeks↗Search↗
03

Round 03 · 2 questions

System Design

High-level architecture of a large-scale system.

  • Design a video-call UI with grid and speaker views.
    SeniorHard◆ Commonly asked
    #frontend#webrtc#perf
    PracticeGeeksforGeeks↗Search↗
  • Design a micro-frontend architecture.
    SeniorHard◆ Commonly asked
    #frontend#architecture
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 3 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

  • Difference between controlled and uncontrolled inputs.
    SeniorEasy◆ Commonly asked
    #react#forms
    PracticeGeeksforGeeks↗Search↗
  • How do you implement dark mode without a flash?
    SeniorMedium◆ Commonly asked
    #css#ssr
    PracticeGeeksforGeeks↗Search↗
  • Explain how CSS-in-JS differs from utility CSS.
    SeniorEasy◆ Commonly asked
    #css
    PracticeGeeksforGeeks↗Search↗
05

Round 05 · 1 question

Hiring Manager

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

  • Walk me through the architecture of a system you owned end to end.
    Senior◆ Commonly asked
    #ownership#architecture
06

Round 06 · 2 questions

Behavioral / HR

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

  • When did you change your mind after seeing new evidence?
    Senior◆ Commonly asked
    #judgment#star
  • How do you handle competing priorities from two managers?
    Senior◆ Commonly asked
    #prioritization#star

Practice each round across every company

  • DSA / Coding
  • Machine Coding
  • System Design
  • Tech Deep-Dive
  • Hiring Manager
  • Behavioral / HR

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