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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

← SpaceX

Senior Full-stack at SpaceX

Full-stackSeniorOffer◆ Commonly asked· 2025

6-round senior fullstack process. 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.

  • Top K frequent elements.
    SeniorMedium◆ Commonly asked
    #heap#hashmap
    PracticeLeetCode↗GeeksforGeeks↗
  • Course Schedule — detect a cycle / topological sort.
    SeniorMedium◆ Commonly asked
    #graph#topo-sort
    PracticeLeetCode↗GeeksforGeeks↗
  • House robber.
    SeniorMedium◆ Commonly asked
    #dp
    PracticeLeetCode↗GeeksforGeeks↗
02

Round 02 · 2 questions

Machine Coding

Build a working component or service under time pressure.

  • Build a URL health checker with a concurrency limit.
    SeniorMedium◆ Commonly asked
    #concurrency
    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 real-time collaborative editor (client side).
    SeniorHard◆ Commonly asked
    #frontend#crdt#realtime
    PracticeGeeksforGeeks↗Search↗
  • Design a ticket booking system (inventory + concurrency).
    SeniorHard◆ Commonly asked
    #concurrency#transactions
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 3 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

  • What are Web Workers and when would you use one?
    SeniorMedium◆ Commonly asked
    #browser#perf
    PracticeGeeksforGeeks↗Search↗
  • How do you secure secrets and handle auth tokens?
    SeniorMedium◆ Commonly asked
    #security
    PracticeGeeksforGeeks↗Search↗
  • How do you prevent XSS in a React app?
    SeniorMedium◆ Commonly asked
    #security#react
    PracticeGeeksforGeeks↗Search↗
05

Round 05 · 1 question

Hiring Manager

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

  • Tell me about a technical bet that did not pay off.
    Senior◆ Commonly asked
    #risk#judgment
06

Round 06 · 2 questions

Behavioral / HR

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

  • How do you get up to speed on an unfamiliar codebase?
    Senior◆ Commonly asked
    #learning
  • Tell me about a time you went above and beyond for a customer.
    Senior◆ Commonly asked
    #customer#star

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