Frontend System Design
/Advanced
WebSockets
Definition
WebSockets provide full-duplex, persistent, bidirectional communication channels over a single TCP connection. Unlike HTTP polling, WebSockets allow servers to push data to clients instantly.
Explain Like I'm New
HTTP is a walkie-talkie (only one speaks at a time). WebSockets are a telephone call (both can speak and listen simultaneously until someone hangs up).
Interactive Example
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Interview Questions
basic
- Can you explain the basic concept of WebSockets?
- Why is WebSockets important in frontend system design?
intermediate
- How does WebSockets impact perceived performance and user experience?
- Describe a scenario where you had to debug an issue related to WebSockets.
advanced
- In a highly scaled enterprise system, how do you optimize WebSockets?
- What are the security implications of WebSockets?
trick
- Can WebSockets be entirely bypassed or disabled? What happens if it is?