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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

← Snap

Senior Full-stack at Snap

Full-stackSeniorNo offer◆ Commonly asked· 2025

Senior fullstack interview. Coding-heavy early, design and behavioral later.

The loop · 6 rounds

01

Round 01 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • House robber II.
    SeniorMedium◆ Commonly asked
    #dp
    PracticeLeetCode↗GeeksforGeeks↗
  • Kth largest element in an array.
    SeniorMedium◆ Commonly asked
    #heap#quickselect
    PracticeLeetCode↗GeeksforGeeks↗
  • Subtree of another 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 in-memory pub/sub with topic subscriptions.
    SeniorMedium◆ Commonly asked
    #pub-sub
    PracticeGeeksforGeeks↗Search↗
  • Build a "polling" progress UI that updates from an API.
    SeniorMedium◆ Commonly asked
    #react#async
    PracticeGeeksforGeeks↗Search↗
03

Round 03 · 2 questions

System Design

High-level architecture of a large-scale system.

  • Design a multi-tenant SaaS data model.
    SeniorHard◆ Commonly asked
    #multi-tenancy#databases
    PracticeGeeksforGeeks↗Search↗
  • Design an online code judge / evaluator.
    SeniorHard◆ Commonly asked
    #sandboxing#queues
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 3 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

  • How would you design and version a public REST API?
    SeniorMedium◆ Commonly asked
    #api-design
    PracticeGeeksforGeeks↗Search↗
  • What causes layout thrashing and how do you avoid it?
    SeniorHard◆ Commonly asked
    #perf#dom
    PracticeGeeksforGeeks↗Search↗
  • What are Web Workers and when would you use one?
    SeniorMedium◆ Commonly asked
    #browser#perf
    PracticeGeeksforGeeks↗Search↗
05

Round 05 · 1 question

Hiring Manager

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

  • How do you evaluate and adopt a new technology?
    Senior◆ Commonly asked
    #judgment
06

Round 06 · 2 questions

Behavioral / HR

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

  • Describe a time you had to deliver bad news.
    Senior◆ Commonly asked
    #communication#star
  • When did you have to make a decision with incomplete data?
    Senior◆ Commonly asked
    #judgment#star

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