Top JavaScript and Node.js Interview Questions for Fresher
What JavaScript topics should freshers prepare for interviews?
Freshers should have a solid understanding of variables, data types, functions, closures, scope, hoisting, promises, async/await, the event loop, callbacks, objects, arrays, DOM manipulation, ES6 features, and error handling. Recruiters frequently ask these concepts before moving to coding or backend-related questions.
What are the most commonly asked Node.js interview questions?
Interviewers commonly ask about the Node.js runtime, Event Loop, non-blocking architecture, npm, package.json, Express.js, middleware, REST APIs, routing, file handling, environment variables, asynchronous programming, and error handling. These questions help evaluate a candidate’s backend development knowledge and practical understanding.
Is coding mandatory during JavaScript and Node.js interviews?
Yes. Most companies now include live coding or online coding assessments as part of the interview process. Candidates may be asked to solve array problems, string manipulation tasks, asynchronous programming exercises, debugging challenges, or build simple REST APIs using Node.js and Express.
What projects should freshers build before attending Node.js interviews?
Building practical projects demonstrates hands-on experience beyond theoretical knowledge. Good beginner projects include a task management application, weather API project, authentication system using JWT, CRUD application with Express.js, blog platform, URL shortener, or simple e-commerce backend with database integration.
Do recruiters expect freshers to know Express.js?
Yes. Many entry-level backend and full-stack developer roles require basic knowledge of Express.js. Freshers should understand routing, middleware, request-response handling, REST API development, and basic server creation using Express, even if they have not worked on enterprise-level applications.
