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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

← xAI

Mid Full-stack at xAI

Full-stackMidWithdrew◆ Commonly asked· 2023

A mid fullstack loop. Fast-paced; expect follow-ups that push on depth.

The loop · 5 rounds

01

Round 01 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Unique paths.
    MidMedium◆ Commonly asked
    #dp#grid
    PracticeLeetCode↗GeeksforGeeks↗
  • Decode ways.
    MidMedium◆ Commonly asked
    #dp#string
    PracticeLeetCode↗GeeksforGeeks↗
  • Find median from data stream.
    MidHard◆ Commonly asked
    #heap#design
    PracticeLeetCode↗GeeksforGeeks↗
02

Round 02 · 2 questions

Machine Coding

Build a working component or service under time pressure.

  • Build an accessible tabs component with keyboard nav.
    MidMedium◆ Commonly asked
    #react#a11y
    PracticeGeeksforGeeks↗Search↗
  • Build a virtualized chat window that loads older messages.
    MidHard◆ Commonly asked
    #react#virtualization
    PracticeGeeksforGeeks↗Search↗
03

Round 03 · 1 question

Low-Level Design

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

  • Design a logging library with levels and sinks.
    MidMedium◆ Commonly asked
    #oop
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 3 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

  • Difference between CSS Grid and Flexbox — when to use each.
    MidEasy◆ Commonly asked
    #css#layout
    PracticeGeeksforGeeks↗Search↗
  • What causes layout thrashing and how do you avoid it?
    MidHard◆ Commonly asked
    #perf#dom
    PracticeGeeksforGeeks↗Search↗
  • Trade-offs of gRPC vs REST vs GraphQL.
    MidMedium◆ Commonly asked
    #api-design
    PracticeGeeksforGeeks↗Search↗
05

Round 05 · 2 questions

Behavioral / HR

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

  • Describe a conflict with your manager and the outcome.
    Mid◆ Commonly asked
    #conflict#star
  • Tell me about a project you are most proud of.
    Mid◆ Commonly asked
    #star

Practice each round across every company

  • DSA / Coding
  • Machine Coding
  • Low-Level Design
  • Tech Deep-Dive
  • 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.