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System Design Quiz Practice
Active Recall Drill Session
← Exit Session
Question 1 of 1
medium
System Design
What does the collaborative editor's 'presence indicator' (who else is viewing) illustrate about choosing AP without much deliberation?
A
Presence indicators must always be CP for correctness
B
Presence is a low-stakes, frequently-updated signal where a second or two of staleness has essentially zero real cost, making it an easy, low-risk AP choice compared to something like permission checking
C
Presence indicators cannot be implemented with pub/sub
D
There's no meaningful CAP consideration for presence at all
Check Answer