Polling is the process where a client requests a particular piece of data at regular intervals (every x seconds) and the server responds with the required data.
Streaming is done through sockets, sockets are a file that your computer can write/read from in a long width connection with another computer, an open connection till one machine turns it off.
In this short video I clarify importance of each, and their use cases with practical examples for you to properly apply them during system design interview.
System Design Interview Basics Playlist:
►https://www.youtube.com/playlist?list=PLJq-63ZRPdBt423WbyAD1YZO0Ljo1pzvY
AWS Certification:
►AWS Certified Cloud Practioner: https://youtu.be/wF1pldkQrOY
►AWS Certified Solution Architect Associate: https://youtu.be/GzomXNLFgkk
►AWS Certified Solution Architect Professional: https://youtu.be/KFZrBxSA9tI