All 4452+ IT interview questions with answers

Featured questions by topic

• What is DOCTYPE? Why is it necessary?

• What does 'cascade' mean in CSS?

• What is the difference between var, let, and const?

• What is TypeScript and why should you use it instead of JavaScript?

• What is JSX and why does React use it?

• How does the App Router differ from the Pages Router in Next.js?

• What is Redux Toolkit (RTK)? Why use RTK instead of plain Redux?

• What is Node.js? How does it differ from JavaScript in the browser?

• What does a basic SELECT statement look like in SQL?

• What is Webpack? What role does it play in modern web development?

• What is CI/CD? What is the difference between CI and CD?

• What is Docker? Why is it useful in development and deployment?

• What is Jest? What are its main features?

• What are Core Web Vitals? What are the three main metrics?

• What is XSS (Cross-Site Scripting)? What are the types of XSS and how do you prevent them?

• How would you design a real-time chat system?

• What is Git Flow? What are the popular branching strategies?

• What is Go (Golang)? Why should you learn it?

• What is SEO? Why does a frontend developer need to understand it?

• Tell me about yourself.

• What is the Single Responsibility Principle (SRP) and why does it matter?

• What is Apache Kafka and why is it widely used in distributed systems?

• What is Redis and why is it extremely fast?

• What is the OSI 7-layer model? What is the function of each layer?

• How do processes and threads differ? When should you use multi-process vs multi-thread?

• What is Cloud Computing? Distinguish between IaaS, PaaS, and SaaS.

• What is Java and why is it still widely used today?

• What is Spring Boot and what are its advantages?

• What is PHP and what does it stand for?

• What is Laravel and what problems does it solve?

• What is the difference between value types and reference types in C#?

• What is the difference between `var`, `dynamic`, and `final` in Dart?

• What is RabbitMQ and why would you use it?

• What is the difference between `val` and `var` in Kotlin?

• How does Python manage memory?

• What is Vue.js? How does it differ from React/Angular?

• What is NestJS? Why use NestJS instead of plain Express?

• What is Angular? How is it different from AngularJS, React and Vue?

• What is a Large Language Model (LLM) and how does it work?

• What is Mixture of Experts (MoE)? How does it differ from dense models?

• How does React Native differ from ReactJS?

• What is FastAPI and when should you use it?

• What is PostgreSQL and when should you choose it?

• What is MongoDB and when should you choose it?

• What flow should you use when solving a coding interview problem?

• When multiple solutions are correct, which one should you choose in an interview?

• What clarifying questions should you ask before coding?

• Should interview code optimize for typing speed or readability?

• What is Django and when should you choose it?

• What is Ruby and what makes it stand out?