theloop
CompaniesRoundsQuestionsSearchProgress
Frontend prep↗
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 GitHubFrontend interview prep ↗

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

← Acko

New Grad / Junior Backend at Acko

BackendNew Grad / JuniorWithdrew◆ Commonly asked· 2024

A junior backend loop. Fast-paced; expect follow-ups that push on depth.

The loop · 5 rounds

01

Round 01 · 1 question

Online Assessment

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

  • Find the missing number in 1..n.
    New Grad / JuniorEasy◆ Commonly asked
    #math
    PracticeLeetCode↗GeeksforGeeks↗
02

Round 02 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Maximum depth of a binary tree.
    New Grad / JuniorEasy◆ Commonly asked
    #tree#dfs
    PracticeLeetCode↗GeeksforGeeks↗
  • Best time to buy and sell stock.
    New Grad / JuniorEasy◆ Commonly asked
    #array#greedy
    PracticeLeetCode↗GeeksforGeeks↗
  • Valid anagram.
    New Grad / JuniorEasy◆ Commonly asked
    #string#hashmap
    PracticeLeetCode↗GeeksforGeeks↗
03

Round 03 · 2 questions

Machine Coding

Build a working component or service under time pressure.

  • Build an in-memory rate limiter as a middleware.
    New Grad / JuniorMedium◆ Commonly asked
    #rate-limit#middleware
    PracticeGeeksforGeeks↗Search↗
  • Build a webhook receiver with signature verification.
    New Grad / JuniorMedium◆ Commonly asked
    #security#api
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 3 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

  • Message queues vs pub/sub — when to use each.
    New Grad / JuniorMedium◆ Commonly asked
    #messaging
    PracticeGeeksforGeeks↗Search↗
  • How does the OAuth 2.0 authorization-code flow work?
    New Grad / JuniorMedium◆ Commonly asked
    #auth#security
    PracticeGeeksforGeeks↗Search↗
  • How do circuit breakers and bulkheads improve resilience?
    New Grad / JuniorMedium◆ Commonly asked
    #reliability
    PracticeGeeksforGeeks↗Search↗
05

Round 05 · 2 questions

Behavioral / HR

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

  • Why this company, and why this role?
    New Grad / Junior◆ Commonly asked
    #motivation
  • How do you handle being blocked for several days?
    New Grad / Junior◆ Commonly asked
    #ownership#star

Practice each round across every company

  • Online Assessment
  • DSA / Coding
  • Machine Coding
  • 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.