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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

← Wells Fargo

Senior Full-stack at Wells Fargo

Full-stackSeniorRejected◆ Commonly asked· 2023

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

The loop · 6 rounds

01

Round 01 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Kth largest element in an array.
    SeniorMedium◆ Commonly asked
    #heap#quickselect
    PracticeLeetCode↗GeeksforGeeks↗
  • Find median from data stream.
    SeniorHard◆ Commonly asked
    #heap#design
    PracticeLeetCode↗GeeksforGeeks↗
  • Sliding window maximum.
    SeniorHard◆ Commonly asked
    #deque#sliding-window
    PracticeLeetCode↗GeeksforGeeks↗
02

Round 02 · 2 questions

Machine Coding

Build a working component or service under time pressure.

  • Implement an exponential-backoff HTTP client.
    SeniorMedium◆ Commonly asked
    #reliability
    PracticeGeeksforGeeks↗Search↗
  • Build a REST endpoint with pagination, filtering and sorting.
    SeniorMedium◆ Commonly asked
    #api#pagination
    PracticeGeeksforGeeks↗Search↗
03

Round 03 · 2 questions

System Design

High-level architecture of a large-scale system.

  • Design a component/design-system architecture for many teams.
    SeniorMedium◆ Commonly asked
    #frontend#design-system
    PracticeGeeksforGeeks↗Search↗
  • Design an event-driven order pipeline with retries.
    SeniorHard◆ Commonly asked
    #events#queues
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 3 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

  • Explain the JS event loop: microtasks vs macrotasks.
    SeniorMedium◆ Commonly asked
    #javascript#event-loop
    PracticeGeeksforGeeks↗Search↗
  • What is backpressure and how do you handle it?
    SeniorHard◆ Commonly asked
    #streaming#reliability
    PracticeGeeksforGeeks↗Search↗
  • How do you implement dark mode without a flash?
    SeniorMedium◆ Commonly asked
    #css#ssr
    PracticeGeeksforGeeks↗Search↗
05

Round 05 · 1 question

Hiring Manager

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

  • How do you decide when a project is done enough to ship?
    Senior◆ Commonly asked
    #delivery#judgment
06

Round 06 · 2 questions

Behavioral / HR

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

  • How do you get up to speed on an unfamiliar codebase?
    Senior◆ Commonly asked
    #learning
  • Describe a time you improved a process or tool for your team.
    Senior◆ Commonly asked
    #ownership#star

Practice each round across every company

  • DSA / Coding
  • Machine Coding
  • System Design
  • Tech Deep-Dive
  • 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.