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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

← Cruise

Mid Backend at Cruise

BackendMidOffer◆ Commonly asked· 2025

A mid backend loop. Fundamentals mattered as much as getting to an answer.

The loop · 5 rounds

01

Round 01 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Median of two sorted arrays.
    MidHard◆ Commonly asked
    #binary-search
    PracticeLeetCode↗GeeksforGeeks↗
  • Sort colors.
    MidMedium◆ Commonly asked
    #two-pointers#array
    PracticeLeetCode↗GeeksforGeeks↗
  • Search in a rotated sorted array.
    MidMedium◆ Commonly asked
    #binary-search
    PracticeLeetCode↗GeeksforGeeks↗
02

Round 02 · 2 questions

Machine Coding

Build a working component or service under time pressure.

  • Implement a bulk-upsert endpoint with validation.
    MidMedium◆ Commonly asked
    #api#validation
    PracticeGeeksforGeeks↗Search↗
  • Implement cursor-based pagination over a sorted dataset.
    MidMedium◆ Commonly asked
    #pagination#api
    PracticeGeeksforGeeks↗Search↗
03

Round 03 · 1 question

Low-Level Design

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

  • Design an ATM / cash dispenser.
    MidMedium◆ Commonly asked
    #oop#state-machine
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 3 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

  • Message queues vs pub/sub — when to use each.
    MidMedium◆ Commonly asked
    #messaging
    PracticeGeeksforGeeks↗Search↗
  • How does HTTPS/TLS establish a secure connection?
    MidMedium◆ Commonly asked
    #networking#security
    PracticeGeeksforGeeks↗Search↗
  • How do you design a public API for backward compatibility?
    MidMedium◆ Commonly asked
    #api-design
    PracticeGeeksforGeeks↗Search↗
05

Round 05 · 2 questions

Behavioral / HR

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

  • When did you have to make a decision with incomplete data?
    Mid◆ Commonly asked
    #judgment#star
  • How do you handle being blocked for several days?
    Mid◆ Commonly asked
    #ownership#star

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