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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

← JPMorgan Chase

New Grad / Junior Full-stack at JPMorgan Chase

Full-stackNew Grad / JuniorOffer◆ Commonly asked· 2024

A junior fullstack loop. Fundamentals mattered as much as getting to an answer.

The loop · 5 rounds

01

Round 01 · 1 question

Online Assessment

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

  • Given a list of transactions, detect fraudulent patterns.
    New Grad / JuniorMedium◆ Commonly asked
    #hashmap#simulation
    PracticeGeeksforGeeks↗Search↗
02

Round 02 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Min cost to connect all points.
    New Grad / JuniorMedium◆ Commonly asked
    #graph#mst
    PracticeLeetCode↗GeeksforGeeks↗
  • Climbing stairs.
    New Grad / JuniorEasy◆ Commonly asked
    #dp
    PracticeLeetCode↗GeeksforGeeks↗
  • Longest substring without repeating characters.
    New Grad / JuniorMedium◆ Commonly asked
    #sliding-window#string
    PracticeLeetCode↗GeeksforGeeks↗
03

Round 03 · 2 questions

Machine Coding

Build a working component or service under time pressure.

  • Build a toast / notification queue.
    New Grad / JuniorMedium◆ Commonly asked
    #react#state
    PracticeGeeksforGeeks↗Search↗
  • Build a key-value store with TTL expiry.
    New Grad / JuniorMedium◆ Commonly asked
    #cache#ttl
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 3 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

  • How do you design an idempotency-key system for payments?
    New Grad / JuniorHard◆ Commonly asked
    #idempotency#payments
    PracticeGeeksforGeeks↗Search↗
  • Explain memoization: useMemo, useCallback and React.memo.
    New Grad / JuniorMedium◆ Commonly asked
    #react#perf
    PracticeGeeksforGeeks↗Search↗
  • How do you design a public API for backward compatibility?
    New Grad / JuniorMedium◆ Commonly asked
    #api-design
    PracticeGeeksforGeeks↗Search↗
05

Round 05 · 2 questions

Behavioral / HR

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

  • Tell me about a project you are most proud of.
    New Grad / Junior◆ Commonly asked
    #star
  • Tell me about the most impactful project of your career.
    New Grad / Junior◆ Commonly asked
    #impact#star

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