Socket.IO quiz

Test your Socket.IO knowledge with a free interactive quiz — 23 questions with answers and explanations. No signup needed to play.

How does Socket.IO relate to the native WebSocket protocol?

1. How does Socket.IO relate to the native WebSocket protocol?
2. What does `io.emit()` (without targeting a specific room or socket) do?
3. How do you leave a room?
4. How do you broadcast an event to all connected clients except the sender?
5. What is a common real-world use case for Socket.IO?
6. How do you install Socket.IO for a Node.js server?
7. How do you handle a client disconnecting?
8. What happens by default if a Socket.IO client's connection drops unexpectedly?
9. How do you send data with an event and receive an acknowledgment back?
10. What is a Socket.IO "namespace"?
11. How do you emit a custom event from the server to a connected client?
12. What is a Socket.IO "room"?

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