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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

← PagerDuty

Mid Full-stack at PagerDuty

Full-stackMidWithdrew◆ Commonly asked· 2025

5-round mid fullstack 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.

  • Valid anagram.
    MidEasy◆ Commonly asked
    #string#hashmap
    PracticeLeetCode↗GeeksforGeeks↗
  • Unique paths.
    MidMedium◆ Commonly asked
    #dp#grid
    PracticeLeetCode↗GeeksforGeeks↗
  • Binary tree level order traversal.
    MidMedium◆ Commonly asked
    #tree#bfs
    PracticeLeetCode↗GeeksforGeeks↗
02

Round 02 · 2 questions

Machine Coding

Build a working component or service under time pressure.

  • Implement cursor-based pagination over a sorted dataset.
    MidMedium◆ Commonly asked
    #pagination#api
    PracticeGeeksforGeeks↗Search↗
  • Implement an exponential-backoff HTTP client.
    MidMedium◆ Commonly asked
    #reliability
    PracticeGeeksforGeeks↗Search↗
03

Round 03 · 1 question

Low-Level Design

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

  • Design a rate limiter (classes + interfaces).
    MidMedium◆ Commonly asked
    #oop#rate-limit
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 3 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

  • Explain database replication lag and how to mitigate it.
    MidMedium◆ Commonly asked
    #databases#replication
    PracticeGeeksforGeeks↗Search↗
  • How do you prevent XSS in a React app?
    MidMedium◆ Commonly asked
    #security#react
    PracticeGeeksforGeeks↗Search↗
  • Explain memoization: useMemo, useCallback and React.memo.
    MidMedium◆ Commonly asked
    #react#perf
    PracticeGeeksforGeeks↗Search↗
05

Round 05 · 2 questions

Behavioral / HR

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

  • Describe something you shipped that you were not proud of.
    Mid◆ Commonly asked
    #tradeoffs#star
  • Tell me about a time you disagreed and committed.
    Mid◆ Commonly asked
    #teamwork#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.