“Pub/Sub” in Information Technology

14 questions across 2 technologies.

Information Technology

14 questions in 2 technologies

#	Question	Technology	Topic	Level
1	What is the Redis Pub/Sub feature, and how does it let different parts of an application communicate? Redis › Pub/Sub	Redis	Pub/Sub	Beginner
2	How would you design a real time notification system using Pub/Sub while working around its lack of guaranteed message delivery? Redis › Pub/Sub	Redis	Pub/Sub	Advanced
3	How does Redis Pub/Sub behave differently in a Redis Cluster environment compared to a single instance setup? Redis › Pub/Sub	Redis	Pub/Sub	Advanced
4	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
5	What is pattern based subscription using PSUBSCRIBE, and how does it differ from subscribing to specific individual channels? Redis › Pub/Sub	Redis	Pub/Sub	Intermediate
6	How do you subscribe to and publish messages on a specific Redis channel? Redis › Pub/Sub	Redis	Pub/Sub	Beginner
7	What happens to a message published on a channel if there are currently no subscribers listening to that channel? Redis › Pub/Sub	Redis	Pub/Sub	Intermediate
8	How do you check how many subscribers are currently listening to a specific channel in Redis? Redis › Pub/Sub	Redis	Pub/Sub	Intermediate
9	What are keyspace notifications in Redis, and what do they let your application do? Redis › Keyspace Notifications	Redis	Keyspace Notifications	Beginner
10	How do you enable keyspace notifications in Redis, and what do the different configuration character options represent? Redis › Keyspace Notifications	Redis	Keyspace Notifications	Beginner
11	What is a Redis Stream, and how does it differ from a regular Redis list when used as a messaging system? Redis › Streams	Redis	Streams	Beginner
12	How do you subscribe to and handle a specific type of keyspace notification, such as being alerted whenever a key expires? Redis › Keyspace Notifications	Redis	Keyspace Notifications	Intermediate
13	What are the reliability limitations of keyspace notifications that developers should understand before relying on them for critical application logic? Redis › Keyspace Notifications	Redis	Keyspace Notifications	Intermediate
14	What practical use cases in a real application are well suited to keyspace notifications despite their delivery limitations? Redis › Keyspace Notifications	Redis	Keyspace Notifications	Intermediate