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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

← Grammarly

Mid Full-stack at Grammarly

Full-stackMidRejected◆ Commonly asked· 2025

5-round mid fullstack process. Pragmatic questions — more real-world than pure puzzles.

The loop · 5 rounds

01

Round 01 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Reverse a linked list.
    MidEasy◆ Commonly asked
    #linked-list
    PracticeLeetCode↗GeeksforGeeks↗
  • Maximum product subarray.
    MidMedium◆ Commonly asked
    #array#dp
    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 an LRU + TTL cache library.
    MidHard◆ Commonly asked
    #cache#ttl
    PracticeGeeksforGeeks↗Search↗
  • Design and build a URL-shortener service (API + storage).
    MidMedium◆ Commonly asked
    #api#hashing
    PracticeGeeksforGeeks↗Search↗
03

Round 03 · 1 question

Low-Level Design

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

  • Design an in-memory file system.
    MidHard◆ Commonly asked
    #oop#trees
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 3 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

  • Explain memoization: useMemo, useCallback and React.memo.
    MidMedium◆ Commonly asked
    #react#perf
    PracticeGeeksforGeeks↗Search↗
  • Explain optimistic vs pessimistic locking.
    MidHard◆ Commonly asked
    #databases
    PracticeGeeksforGeeks↗Search↗
  • Trade-offs of gRPC vs REST vs GraphQL.
    MidMedium◆ Commonly asked
    #api-design
    PracticeGeeksforGeeks↗Search↗
05

Round 05 · 2 questions

Behavioral / HR

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

  • Why this company, and why this role?
    Mid◆ Commonly asked
    #motivation
  • Tell me about a time you simplified something overly complex.
    Mid◆ Commonly asked
    #judgment#star

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