7 questions for “WebSockets & Real-Time Communication”

Found in 1 field. Select a question to see its full answer.

Information Technology

7 questions in 1 technology

#	Question	Technology	Topic	Level
1	What is Redis Pub/Sub, and how would a Node.js application use it to broadcast real-time events across multiple server instances? Node.js › Caching with Redis	Node.js	Caching with Redis	Intermediate
2	How would you implement Server-Sent Events (SSE) in Node.js to push real-time updates to a browser client over a single long-lived HTTP connection? Node.js › HTTP & Web Servers	Node.js	HTTP & Web Servers	Advanced
3	How would you track and expose the progress of a long-running background job to the client that requested it? Node.js › Background Jobs & Queues	Node.js	Background Jobs & Queues	Intermediate
4	What is the difference between the 'sticky' and default load-balancing strategies when using Node's cluster module, and when does it matter? Node.js › Clustering & Worker Threads	Node.js	Clustering & Worker Threads	Intermediate
5	How would you implement a progress indicator for a large file upload from the client's perspective, given the Node.js server side? Node.js › File Uploads & Media Processing	Node.js	File Uploads & Media Processing	Intermediate
6	What is the difference between a GraphQL Query, Mutation, and Subscription operation type? Node.js › GraphQL	Node.js	GraphQL	Intermediate
7	What happens to in-memory state (like an in-memory cache) when using the Node.js cluster module, and how do you handle this correctly? Node.js › Clustering & Worker Threads	Node.js	Clustering & Worker Threads	Advanced