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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

← Flexport

Senior Frontend at Flexport

FrontendSeniorOffer◆ Commonly asked· 2023

A senior frontend loop. Fast-paced; expect follow-ups that push on depth.

The loop · 6 rounds

01

Round 01 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Word search in a grid.
    SeniorMedium◆ Commonly asked
    #backtracking#grid
    PracticeLeetCode↗GeeksforGeeks↗
  • Maximum subarray (Kadane).
    SeniorMedium◆ Commonly asked
    #array#dp
    PracticeLeetCode↗GeeksforGeeks↗
  • Subsets.
    SeniorMedium◆ Commonly asked
    #backtracking
    PracticeLeetCode↗GeeksforGeeks↗
02

Round 02 · 2 questions

Machine Coding

Build a working component or service under time pressure.

  • Build a countdown timer with pause and resume.
    SeniorEasy◆ Commonly asked
    #react#state
    PracticeGeeksforGeeks↗Search↗
  • Build a color-picker with hex/rgb sync.
    SeniorMedium◆ Commonly asked
    #react#ui
    PracticeGeeksforGeeks↗Search↗
03

Round 03 · 2 questions

System Design

High-level architecture of a large-scale system.

  • Design a web crawler.
    SeniorHard◆ Commonly asked
    #queues#dedup#scale
    PracticeGeeksforGeeks↗Search↗
  • Design a component/design-system architecture for many teams.
    SeniorMedium◆ Commonly asked
    #frontend#design-system
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 3 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

  • Explain the difference between == and === and coercion.
    SeniorEasy◆ Commonly asked
    #javascript
    PracticeGeeksforGeeks↗Search↗
  • Closures and the module pattern — with an example.
    SeniorEasy◆ Commonly asked
    #javascript#closures
    PracticeGeeksforGeeks↗Search↗
  • How do you prevent XSS in a React app?
    SeniorMedium◆ Commonly asked
    #security#react
    PracticeGeeksforGeeks↗Search↗
05

Round 05 · 1 question

Hiring Manager

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

  • Describe how you drove alignment across multiple teams.
    Senior◆ Commonly asked
    #collaboration#influence
06

Round 06 · 2 questions

Behavioral / HR

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

  • Describe a conflict with your manager and the outcome.
    Senior◆ Commonly asked
    #conflict#star
  • Tell me about a project you are most proud of.
    Senior◆ Commonly asked
    #star

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