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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

← Siemens

Staff+ Backend at Siemens

BackendStaff+Withdrew◆ Commonly asked· 2025

Staff backend interview. 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.

  • Combination sum.
    Staff+Medium◆ Commonly asked
    #backtracking
    PracticeLeetCode↗GeeksforGeeks↗
  • Minimum window substring.
    Staff+Hard◆ Commonly asked
    #sliding-window#string
    PracticeLeetCode↗GeeksforGeeks↗
  • Invert a binary tree.
    Staff+Easy◆ Commonly asked
    #tree
    PracticeLeetCode↗GeeksforGeeks↗
02

Round 02 · 1 question

Low-Level Design

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

  • Design a movie-ticket booking system (BookMyShow).
    Staff+Hard◆ Commonly asked
    #oop#concurrency
    PracticeGeeksforGeeks↗Search↗
03

Round 03 · 2 questions

System Design

High-level architecture of a large-scale system.

  • Design a feature-flag service.
    Staff+Medium◆ Commonly asked
    #config#rollout
    PracticeGeeksforGeeks↗Search↗
  • Design a notification system (push/email/SMS).
    Staff+Medium◆ Commonly asked
    #queues#fanout
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 1 question

Hiring Manager

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

  • How do you balance tech debt against feature work?
    Staff+◆ Commonly asked
    #prioritization
05

Round 05 · 2 questions

Behavioral / HR

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

  • Tell me about a time you led without a title.
    Staff+◆ Commonly asked
    #leadership#star
  • A time you made a mistake in production — what happened next?
    Staff+◆ Commonly asked
    #ownership#star

Practice each round across every company

  • DSA / Coding
  • Low-Level Design
  • System Design
  • Hiring Manager
  • 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.