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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

← WNS

Mid Full-stack at WNS

Full-stackMidRejected◆ Commonly asked· 2024

Campus-style mid fullstack interview. Fundamentals over puzzles — OOP, DBMS and SQL carried the most weight.

The loop · 5 rounds

01

Round 01 · 3 questions

Online Assessment

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

  • Pseudocode: predict the output of the given code block.
    MidMedium◆ Commonly asked
    #pseudocode
    PracticeGeeksforGeeks↗Search↗
  • Verbal ability: error spotting and sentence correction.
    MidEasy◆ Commonly asked
    #verbal
    PracticeGeeksforGeeks↗Search↗
  • Quantitative aptitude: permutations, combinations and probability.
    MidMedium◆ Commonly asked
    #aptitude
    PracticeGeeksforGeeks↗Search↗
02

Round 02 · 2 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Swap two numbers without using a temporary variable.
    MidEasy◆ Commonly asked
    #math
    PracticeGeeksforGeeks↗Search↗
  • Remove duplicates from an array without using extra space.
    MidMedium◆ Commonly asked
    #array
    PracticeGeeksforGeeks↗Search↗
03

Round 03 · 4 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

  • What is polymorphism? Compile-time vs runtime.
    MidEasy◆ Commonly asked
    #oops
    PracticeGeeksforGeeks↗Search↗
  • What is a deadlock and how do you prevent it?
    MidMedium◆ Commonly asked
    #os
    PracticeGeeksforGeeks↗Search↗
  • Explain the layers of the OSI model.
    MidEasy◆ Commonly asked
    #networking
    PracticeGeeksforGeeks↗Search↗
  • Difference between abstraction and encapsulation.
    MidEasy◆ Commonly asked
    #oops
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 2 questions

Hiring Manager

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

  • How do you estimate the effort for a module assigned to you?
    Mid◆ Commonly asked
  • Walk me through your project and your exact contribution to it.
    Mid◆ Commonly asked
05

Round 05 · 3 questions

Behavioral / HR

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

  • Tell me about your final-year project.
    Mid◆ Commonly asked
  • Are you comfortable signing the service agreement / bond?
    Mid◆ Commonly asked
  • Tell me about yourself.
    Mid◆ Commonly asked

Practice each round across every company

  • Online Assessment
  • DSA / Coding
  • Tech Deep-Dive
  • 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.