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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

← CRED

Senior Full-stack at CRED

Full-stackSeniorNo offer◆ Commonly asked· 2025

6-round senior fullstack process. Balanced across coding, design, and collaboration.

The loop · 6 rounds

01

Round 01 · 3 questions

DSA / Coding

Data structures & algorithms on a whiteboard or shared editor.

  • Kth smallest element in a BST.
    SeniorMedium◆ Commonly asked
    #tree#bst
    PracticeLeetCode↗GeeksforGeeks↗
  • Serialize and deserialize a binary tree.
    SeniorHard◆ Commonly asked
    #tree#dfs
    PracticeLeetCode↗GeeksforGeeks↗
  • Longest substring without repeating characters.
    SeniorMedium◆ Commonly asked
    #sliding-window#string
    PracticeLeetCode↗GeeksforGeeks↗
02

Round 02 · 2 questions

Machine Coding

Build a working component or service under time pressure.

  • Build a file-upload service with chunking and resume.
    SeniorHard◆ Commonly asked
    #streaming#storage
    PracticeGeeksforGeeks↗Search↗
  • Build a CSV importer that streams and validates rows.
    SeniorMedium◆ Commonly asked
    #streaming#validation
    PracticeGeeksforGeeks↗Search↗
03

Round 03 · 2 questions

System Design

High-level architecture of a large-scale system.

  • Design a rate-limited, multi-tenant public API gateway.
    SeniorHard◆ Commonly asked
    #gateway#rate-limit
    PracticeGeeksforGeeks↗Search↗
  • Design a chat application like WhatsApp.
    SeniorHard◆ Commonly asked
    #websocket#fanout#storage
    PracticeGeeksforGeeks↗Search↗
04

Round 04 · 3 questions

Tech Deep-Dive

Deep questions on your core stack and fundamentals.

  • How do you prevent XSS in a React app?
    SeniorMedium◆ Commonly asked
    #security#react
    PracticeGeeksforGeeks↗Search↗
  • Explain connection pooling and why it matters.
    SeniorMedium◆ Commonly asked
    #databases
    PracticeGeeksforGeeks↗Search↗
  • How do you implement dark mode without a flash?
    SeniorMedium◆ Commonly asked
    #css#ssr
    PracticeGeeksforGeeks↗Search↗
05

Round 05 · 1 question

Hiring Manager

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

  • How do you decide when a project is done enough to ship?
    Senior◆ Commonly asked
    #delivery#judgment
06

Round 06 · 2 questions

Behavioral / HR

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

  • How do you get up to speed on an unfamiliar codebase?
    Senior◆ Commonly asked
    #learning
  • Tell me about a project you are most proud of.
    Senior◆ Commonly asked
    #star

Practice each round across every company

  • DSA / Coding
  • Machine Coding
  • System Design
  • 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.