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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

← Marqeta

New Grad / Junior Frontend at Marqeta

FrontendNew Grad / JuniorOffer◆ Commonly asked· 2023

5-round junior frontend process. 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.

  • Rotate a matrix 90 degrees in place.
    New Grad / JuniorMedium◆ Commonly asked
    #matrix
    PracticeLeetCode↗GeeksforGeeks↗
02

Round 02 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Find median from data stream.
    New Grad / JuniorHard◆ Commonly asked
    #heap#design
    PracticeLeetCode↗GeeksforGeeks↗
  • Group anagrams from a list of strings.
    New Grad / JuniorMedium◆ Commonly asked
    #hashmap#string
    PracticeLeetCode↗GeeksforGeeks↗
  • Number of islands in a 2D grid.
    New Grad / JuniorMedium◆ Commonly asked
    #bfs#dfs#grid
    PracticeLeetCode↗GeeksforGeeks↗
03

Round 03 · 2 questions

Machine Coding

Build a working component or service under time pressure.

  • Build a modal/dialog with focus trapping.
    New Grad / JuniorMedium◆ Commonly asked
    #react#a11y
    PracticeGeeksforGeeks↗Search↗
  • Build an image carousel with autoplay and swipe.
    New Grad / JuniorMedium◆ Commonly asked
    #react#ui
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 3 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

  • What is the difference between var, let and const?
    New Grad / JuniorEasy◆ Commonly asked
    #javascript
    PracticeGeeksforGeeks↗Search↗
  • How do you code-split and lazy-load a route?
    New Grad / JuniorMedium◆ Commonly asked
    #bundling#perf
    PracticeGeeksforGeeks↗Search↗
  • Explain prototypal inheritance.
    New Grad / JuniorMedium◆ Commonly asked
    #javascript
    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.