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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

← Wise

New Grad / Junior Backend at Wise

BackendNew Grad / JuniorOutcome unknown◆ Commonly asked· 2025

Junior backend interview. Fundamentals mattered as much as getting to an answer.

The loop · 5 rounds

01

Round 01 · 1 question

Online Assessment

Timed online coding / aptitude screen, usually the first filter.

  • Implement a min-stack supporting getMin in O(1).
    New Grad / JuniorMedium◆ Commonly asked
    #stack
    PracticeLeetCode↗GeeksforGeeks↗
02

Round 02 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Clone a graph.
    New Grad / JuniorMedium◆ Commonly asked
    #graph#dfs
    PracticeLeetCode↗GeeksforGeeks↗
  • Implement a trie (prefix tree).
    New Grad / JuniorMedium◆ Commonly asked
    #trie
    PracticeLeetCode↗GeeksforGeeks↗
  • Meeting rooms II — minimum rooms required.
    New Grad / JuniorMedium◆ Commonly asked
    #heap#intervals
    PracticeLeetCode↗GeeksforGeeks↗
03

Round 03 · 2 questions

Machine Coding

Build a working component or service under time pressure.

  • Build a file-upload service with chunking and resume.
    New Grad / JuniorHard◆ Commonly asked
    #streaming#storage
    PracticeGeeksforGeeks↗Search↗
  • Design and build a URL-shortener service (API + storage).
    New Grad / JuniorMedium◆ Commonly asked
    #api#hashing
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 3 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

  • How do you secure secrets and handle auth tokens?
    New Grad / JuniorMedium◆ Commonly asked
    #security
    PracticeGeeksforGeeks↗Search↗
  • SQL vs NoSQL — how do you choose for a given workload?
    New Grad / JuniorMedium◆ Commonly asked
    #databases
    PracticeGeeksforGeeks↗Search↗
  • Explain the difference between horizontal and vertical scaling.
    New Grad / JuniorEasy◆ Commonly asked
    #scale
    PracticeGeeksforGeeks↗Search↗
05

Round 05 · 2 questions

Behavioral / HR

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

  • Describe a time you improved a process or tool for your team.
    New Grad / Junior◆ Commonly asked
    #ownership#star
  • Tell me about a time you failed and what you learned.
    New Grad / Junior◆ Commonly asked
    #growth#star

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