theloop
CompaniesRoundsQuestionsSearchProgress
theloop

Interview questions from top companies, mapped to the exact round they show up in. Prep for what you will actually face.

View source

Browse

CompaniesSearchAll rounds

Rounds

Online AssessmentDSA / CodingMachine CodingLow-Level Design

Contribute

Share an interviewReport an issueStar on GitHub

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

← IBM

Staff+ Full-stack at IBM

Full-stackStaff+Offer◆ Commonly asked· 2025

5-round staff fullstack process. Coding-heavy early, design and behavioral later.

The loop · 5 rounds

01

Round 01 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Group anagrams from a list of strings.
    Staff+Medium◆ Commonly asked
    #hashmap#string
    PracticeLeetCode↗GeeksforGeeks↗
  • Diameter of a binary tree.
    Staff+Easy◆ Commonly asked
    #tree#dfs
    PracticeLeetCode↗GeeksforGeeks↗
  • Best time to buy and sell stock.
    Staff+Easy◆ Commonly asked
    #array#greedy
    PracticeLeetCode↗GeeksforGeeks↗
02

Round 02 · 1 question

Low-Level Design

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

  • Design a reusable form-validation library API.
    Staff+Medium◆ Commonly asked
    #oop#api-design
    PracticeGeeksforGeeks↗Search↗
03

Round 03 · 2 questions

System Design

High-level architecture of a large-scale system.

  • Design a Google Docs-style collaborative editor (frontend).
    Staff+Hard◆ Commonly asked
    #frontend#crdt#realtime
    PracticeGeeksforGeeks↗Search↗
  • Design a video-call UI with grid and speaker views.
    Staff+Hard◆ Commonly asked
    #frontend#webrtc#perf
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 1 question

Hiring Manager

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

  • How do you set technical direction for a team?
    Staff+◆ Commonly asked
    #leadership#strategy
05

Round 05 · 2 questions

Behavioral / HR

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

  • When did you change your mind after seeing new evidence?
    Staff+◆ Commonly asked
    #judgment#star
  • Describe a time you had to deliver bad news.
    Staff+◆ Commonly asked
    #communication#star

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