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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

← FirstClub

Staff+ Full-stack at FirstClub

Full-stackStaff+Offer◆ Commonly asked· 2025

A staff fullstack loop. Balanced across coding, design, and collaboration.

The loop · 5 rounds

01

Round 01 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Serialize and deserialize a binary tree.
    Staff+Hard◆ Commonly asked
    #tree#dfs
    PracticeLeetCode↗GeeksforGeeks↗
  • Maximum depth of a binary tree.
    Staff+Easy◆ Commonly asked
    #tree#dfs
    PracticeLeetCode↗GeeksforGeeks↗
  • Find minimum in rotated sorted array.
    Staff+Medium◆ Commonly asked
    #binary-search
    PracticeLeetCode↗GeeksforGeeks↗
02

Round 02 · 1 question

Low-Level Design

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

  • Design an undo/redo stack for an editor.
    Staff+Medium◆ Commonly asked
    #oop#command
    PracticeGeeksforGeeks↗Search↗
03

Round 03 · 2 questions

System Design

High-level architecture of a large-scale system.

  • Design client-side state and data-fetching for a large SPA.
    Staff+Hard◆ Commonly asked
    #frontend#state#caching
    PracticeGeeksforGeeks↗Search↗
  • Design a distributed unique ID generator.
    Staff+Medium◆ Commonly asked
    #snowflake#distributed
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 1 question

Hiring Manager

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

  • Tell me about a project that slipped. What did you do?
    Staff+◆ Commonly asked
    #delivery
05

Round 05 · 2 questions

Behavioral / HR

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

  • How do you get up to speed on an unfamiliar codebase?
    Staff+◆ Commonly asked
    #learning
  • Describe handling a tight deadline with competing priorities.
    Staff+◆ Commonly asked
    #prioritization#star

Practice each round across every company

  • DSA / Coding
  • Low-Level Design
  • System Design
  • Hiring Manager
  • 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.