D-PWF-OE-00 · Question #49
Enabling Maintenance Mode on a node allows it to be removed from the cluster without impacting data availability.
The correct answer is A. True. A is correct because Maintenance Mode (sometimes called "drain" or "evacuation" mode) signals the cluster to safely redistribute the node's data replicas and responsibilities to other nodes before the node is taken offline. This ensures no data shards or partitions become…
Question
Enabling Maintenance Mode on a node allows it to be removed from the cluster without impacting data availability.
Options
- ATrue
- BFalse
How the community answered
(59 responses)- A93% (55)
- B7% (4)
Explanation
A is correct because Maintenance Mode (sometimes called "drain" or "evacuation" mode) signals the cluster to safely redistribute the node's data replicas and responsibilities to other nodes before the node is taken offline. This ensures no data shards or partitions become unavailable during the removal process.
B is incorrect because simply removing a node without Maintenance Mode can leave data partitions under-replicated or temporarily inaccessible, potentially causing read/write failures until the cluster rebalances.
Memory tip: Think of Maintenance Mode like "giving two weeks' notice" - the node gracefully hands off its workload before leaving, rather than just disappearing and leaving gaps. If it just vanished (no maintenance mode), coworkers (other nodes) would scramble to cover, and some work (data) might get dropped.
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