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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

← Apple

Mid Full-stack at Apple

Full-stackMidWithdrew◆ Commonly asked· 2025

A mid fullstack loop. Pragmatic questions — more real-world than pure puzzles.

The loop · 5 rounds

01

Round 01 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Decode ways.
    MidMedium◆ Commonly asked
    #dp#string
    PracticeLeetCode↗GeeksforGeeks↗
  • 3Sum.
    MidMedium◆ Commonly asked
    #two-pointers#array
    PracticeLeetCode↗GeeksforGeeks↗
  • Valid Parentheses — check balanced brackets.
    MidEasy◆ Commonly asked
    #stack#string
    PracticeLeetCode↗GeeksforGeeks↗
02

Round 02 · 2 questions

Machine Coding

Build a working component or service under time pressure.

  • Build a kanban board with drag and drop.
    MidHard◆ Commonly asked
    #react#dnd
    PracticeGeeksforGeeks↗Search↗
  • Build an in-memory rate limiter as a middleware.
    MidMedium◆ Commonly asked
    #rate-limit#middleware
    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.

  • How do you optimize a slow React app? (profiling → fixes)
    MidHard◆ Commonly asked
    #react#perf
    PracticeGeeksforGeeks↗Search↗
  • How do you run a zero-downtime database migration?
    MidHard◆ Commonly asked
    #databases
    PracticeGeeksforGeeks↗Search↗
  • Explain the CSS box model and box-sizing.
    MidEasy◆ Commonly asked
    #css
    PracticeGeeksforGeeks↗Search↗
05

Round 05 · 2 questions

Behavioral / HR

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

  • Describe mentoring or unblocking another engineer.
    Mid◆ Commonly asked
    #mentorship#star
  • Tell me about a time you led without a title.
    Mid◆ Commonly asked
    #leadership#star

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