API Design · Junior · Question 52 of 75

When do Server-Sent Events fit better than polling?

1When the client uploads files
2When data never changes
✓Correct answer: When the client needs updates pushed from the server as they happen, without sending repeated requests

Explanation

SSE is one-way over HTTP; WebSockets are two-way. Polling is simplest but wastes requests and adds delay.

Further reading

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