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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

← Discord

Senior Frontend at Discord

FrontendSeniorOutcome unknown◆ Commonly asked· 2025

6-round senior frontend process. Balanced across coding, design, and collaboration.

The loop · 6 rounds

01

Round 01 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Longest substring without repeating characters.
    SeniorMedium◆ Commonly asked
    #sliding-window#string
    PracticeLeetCode↗GeeksforGeeks↗
  • Insert interval.
    SeniorMedium◆ Commonly asked
    #intervals
    PracticeLeetCode↗GeeksforGeeks↗
  • Meeting rooms II — minimum rooms required.
    SeniorMedium◆ Commonly asked
    #heap#intervals
    PracticeLeetCode↗GeeksforGeeks↗
02

Round 02 · 2 questions

Machine Coding

Build a working component or service under time pressure.

  • Build a form builder that renders from a JSON schema.
    SeniorHard◆ Commonly asked
    #react#forms
    PracticeGeeksforGeeks↗Search↗
  • Build a kanban board with drag and drop.
    SeniorHard◆ Commonly asked
    #react#dnd
    PracticeGeeksforGeeks↗Search↗
03

Round 03 · 2 questions

System Design

High-level architecture of a large-scale system.

  • Design an analytics / metrics dashboard backend.
    SeniorHard◆ Commonly asked
    #time-series#aggregation
    PracticeGeeksforGeeks↗Search↗
  • Design a typeahead / autocomplete service.
    SeniorHard◆ Commonly asked
    #trie#cache#ranking
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 3 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

  • How do CSS specificity and the cascade resolve conflicts?
    SeniorMedium◆ Commonly asked
    #css
    PracticeGeeksforGeeks↗Search↗
  • Explain how CSS-in-JS differs from utility CSS.
    SeniorEasy◆ Commonly asked
    #css
    PracticeGeeksforGeeks↗Search↗
  • What is the virtual DOM and why does it help?
    SeniorMedium◆ Commonly asked
    #react
    PracticeGeeksforGeeks↗Search↗
05

Round 05 · 1 question

Hiring Manager

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

  • How do you decide when a project is done enough to ship?
    Senior◆ Commonly asked
    #delivery#judgment
06

Round 06 · 2 questions

Behavioral / HR

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

  • Why this company, and why this role?
    Senior◆ Commonly asked
    #motivation
  • Describe something you shipped that you were not proud of.
    Senior◆ Commonly asked
    #tradeoffs#star

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