Question library

Interview questions & answers

Clear, interview-ready answers to the questions engineers actually get asked.

Question sets by topic

Curated questions & answers for the topics engineers get grilled on most — coding, databases, CS fundamentals, web, and more.

Programming

Python Interview Questions 102 Qs Java Interview Questions 105 Qs Spring Boot Interview Questions 100 Qs C Programming Interview Questions 17 Qs C++ Interview Questions 18 Qs

Web

JavaScript Interview Questions 101 Qs Node.js Interview Questions 122 Qs HTML Interview Questions 17 Qs Angular Interview Questions 118 Qs CSS Interview Questions 17 Qs

Testing

Selenium Interview Questions 16 Qs

CS Fundamentals

OOPs Interview Questions 145 Qs Operating System Interview Questions 170 Qs System Design Interview Questions 16 Qs DSA Interview Questions (Data Structures and Algorithms) 141 Qs Computer Networks Interview Questions 130 Qs

Database

DBMS Interview Questions 125 Qs SQL Interview Questions 101 Qs MySQL Interview Questions 16 Qs

Cloud & DevOps

AWS Interview Questions 17 Qs Microservices Interview Questions 17 Qs Docker Interview Questions 17 Qs Kubernetes Interview Questions 17 Qs Git Interview Questions 17 Qs

Data & AI

Machine Learning Interview Questions 127 Qs Data Science Interview Questions 17 Qs

Companies

TCS Interview Questions 77 Qs Infosys Interview Questions 74 Qs Accenture Interview Questions 83 Qs Cognizant Interview Questions 77 Qs Capgemini Interview Questions 101 Qs

Coding

REST vs GraphQL: what is the difference? How does the Node.js event loop work? Promises vs async/await in JavaScript What are React hooks?

System Design

What is caching and why is it used? What is load balancing? How does database indexing work? What is the CAP theorem?

CS Fundamentals

SQL vs NoSQL: when to use which? Process vs thread: what is the difference? TCP vs UDP: what is the difference? What is Big-O notation? What are ACID properties in databases?

Behavioral

How to answer "What is your greatest weakness?" How to answer "Why do you want to work here?"