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Uber · Node Js
Practice Node Js questions specifically asked in Uber interviews – ideal for online test preparation, technical rounds and final HR discussions.
Questions
6
Tagged for this company + subject
Company
Uber
View company-wise questions
Subject
Node Js
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Go through each question and its explanation. Use this page for targeted revision just before your Uber Node Js round.
Express simplifies HTTP server creation and routing. It handles requests, middleware, and responses easily, making it ideal for APIs and full-stack apps. It’s fast, minimal, and widely supported.
For complete preparation, combine this company + subject page with full company-wise practice and subject-wise practice. You can also explore other companies and topics from the links below.
WebSockets enable full-duplex (two-way) communication between client and server. They maintain an open connection for real-time updates (e.g., chats, games). Implemented using `ws` or `socket.io` libraries.
const WebSocket=require('ws');
const wss=new WebSocket.Server({port:8080});
wss.on('connection',ws=>ws.send('Connected!'));Node.js is fast, lightweight, and highly scalable. It supports asynchronous non-blocking operations, making it perfect for real-time and I/O-heavy applications. It uses a single-threaded event loop model, reducing overhead and improving performance.
Node.js is used for real-time chat apps, streaming platforms, IoT systems, single-page applications, APIs, and microservices due to its scalability and event-driven nature.
Express.js is a minimal and flexible web framework built on Node.js. It simplifies handling routes, requests, and middleware to build RESTful APIs and web apps quickly.
Separating your app from the server simplifies testing, scaling, and deployment. The app handles routes and middleware, while the server handles network configuration and listening. This structure improves maintainability.