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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

← Scaler

Mid Frontend at Scaler

FrontendMidRejected◆ Commonly asked· 2023

5-round mid frontend process. Fast-paced; expect follow-ups that push on depth.

The loop · 5 rounds

01

Round 01 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Maximum depth of a binary tree.
    MidEasy◆ Commonly asked
    #tree#dfs
    PracticeLeetCode↗GeeksforGeeks↗
  • Reverse nodes in k-group.
    MidHard◆ Commonly asked
    #linked-list
    PracticeLeetCode↗GeeksforGeeks↗
  • Course Schedule II.
    MidMedium◆ Commonly asked
    #graph#topo-sort
    PracticeLeetCode↗GeeksforGeeks↗
02

Round 02 · 2 questions

Machine Coding

Build a working component or service under time pressure.

  • Build a multi-step form with validation.
    MidMedium◆ Commonly asked
    #react#forms
    PracticeGeeksforGeeks↗Search↗
  • Build a modal/dialog with focus trapping.
    MidMedium◆ Commonly asked
    #react#a11y
    PracticeGeeksforGeeks↗Search↗
03

Round 03 · 1 question

Low-Level Design

Object-oriented / low-level design of a focused module.

  • Design a drag-and-drop framework abstraction.
    MidHard◆ Commonly asked
    #oop#dnd
    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.
    MidMedium◆ Commonly asked
    #javascript#event-loop
    PracticeGeeksforGeeks↗Search↗
  • Debounce vs throttle — implement one from scratch.
    MidMedium◆ Commonly asked
    #javascript#perf
    PracticeGeeksforGeeks↗Search↗
  • What are React keys and why do they matter?
    MidEasy◆ Commonly asked
    #react
    PracticeGeeksforGeeks↗Search↗
05

Round 05 · 2 questions

Behavioral / HR

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

  • Tell me about the most impactful project of your career.
    Mid◆ Commonly asked
    #impact#star
  • Tell me about a time you led without a title.
    Mid◆ Commonly asked
    #leadership#star

Practice each round across every company

  • DSA / Coding
  • Machine Coding
  • Low-Level Design
  • 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.