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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

← Fiserv

Intern Full-stack at Fiserv

Full-stackInternWithdrew◆ Commonly asked· 2024

4-round intern fullstack process. Aptitude screen first, then technical fundamentals and HR.

The loop · 4 rounds

01

Round 01 · 3 questions

Online Assessment

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

  • Quantitative aptitude: permutations, combinations and probability.
    InternMedium◆ Commonly asked
    #aptitude
    PracticeGeeksforGeeks↗Search↗
  • Logical reasoning: data interpretation from charts and tables.
    InternMedium◆ Commonly asked
    #reasoning
    PracticeGeeksforGeeks↗Search↗
  • Quantitative aptitude: ratio, proportion and averages.
    InternEasy◆ Commonly asked
    #aptitude
    PracticeGeeksforGeeks↗Search↗
02

Round 02 · 2 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Check whether a string is a palindrome.
    InternEasy◆ Commonly asked
    #string
    PracticeGeeksforGeeks↗Search↗
  • Reverse a string without using library functions.
    InternEasy◆ Commonly asked
    #string
    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.
    InternEasy◆ Commonly asked
    #oops
    PracticeGeeksforGeeks↗Search↗
  • Explain virtual memory, paging and segmentation.
    InternMedium◆ Commonly asked
    #os
    PracticeGeeksforGeeks↗Search↗
  • Explain SQL joins: inner, left, right and full outer.
    InternEasy◆ Commonly asked
    #sql
    PracticeGeeksforGeeks↗Search↗
  • What is a deadlock and how do you prevent it?
    InternMedium◆ Commonly asked
    #os
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 3 questions

Behavioral / HR

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

  • Tell me about your final-year project.
    Intern◆ Commonly asked
  • Why do you want to join our company?
    Intern◆ Commonly asked
  • How do you handle pressure and tight deadlines?
    Intern◆ Commonly asked

Practice each round across every company

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