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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

← Wayfair

New Grad / Junior Backend at Wayfair

BackendNew Grad / JuniorWithdrew◆ Commonly asked· 2024

A junior backend loop. Coding-heavy early, design and behavioral later.

The loop · 5 rounds

01

Round 01 · 1 question

Online Assessment

Timed online coding / aptitude screen, usually the first filter.

  • Validate an IP address (IPv4 / IPv6).
    New Grad / JuniorMedium◆ Commonly asked
    #string#parsing
    PracticeGeeksforGeeks↗Search↗
02

Round 02 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Rotate array.
    New Grad / JuniorMedium◆ Commonly asked
    #array
    PracticeLeetCode↗GeeksforGeeks↗
  • Trapping rain water.
    New Grad / JuniorHard◆ Commonly asked
    #two-pointers#array
    PracticeLeetCode↗GeeksforGeeks↗
  • Edit distance.
    New Grad / JuniorHard◆ Commonly asked
    #dp#string
    PracticeLeetCode↗GeeksforGeeks↗
03

Round 03 · 2 questions

Machine Coding

Build a working component or service under time pressure.

  • Build a key-value store with TTL expiry.
    New Grad / JuniorMedium◆ Commonly asked
    #cache#ttl
    PracticeGeeksforGeeks↗Search↗
  • Implement a token-bucket rate limiter as a service.
    New Grad / JuniorMedium◆ Commonly asked
    #rate-limit
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 3 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

  • Difference between at-least-once and exactly-once delivery.
    New Grad / JuniorHard◆ Commonly asked
    #messaging
    PracticeGeeksforGeeks↗Search↗
  • How do you design a schema for a multi-currency ledger?
    New Grad / JuniorHard◆ Commonly asked
    #databases#money
    PracticeGeeksforGeeks↗Search↗
  • Explain database indexing and when a query uses one.
    New Grad / JuniorMedium◆ Commonly asked
    #databases#indexing
    PracticeGeeksforGeeks↗Search↗
05

Round 05 · 2 questions

Behavioral / HR

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

  • Tell me about a time you failed and what you learned.
    New Grad / Junior◆ Commonly asked
    #growth#star
  • When did you change your mind after seeing new evidence?
    New Grad / Junior◆ Commonly asked
    #judgment#star

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