Setting an RTO of 0 guarantees that services will not be interrupted.

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Multiple Choice

Setting an RTO of 0 guarantees that services will not be interrupted.

Explanation:
RTO tells you the maximum allowed downtime after a disruption. A value of zero would mean services stay up at all times, even during failures. In practice, there are always small delays involved: failure detection, signaling to switch over, syncing data, re-establishing connections, and ensuring data consistency. Even with highly available setups like active-active clusters or hot standby, these steps introduce at least a brief interruption. So you cannot guarantee zero downtime; the best you can do is design to minimize it and set a very small RTO, but zero downtime isn’t realistically achievable.

RTO tells you the maximum allowed downtime after a disruption. A value of zero would mean services stay up at all times, even during failures. In practice, there are always small delays involved: failure detection, signaling to switch over, syncing data, re-establishing connections, and ensuring data consistency. Even with highly available setups like active-active clusters or hot standby, these steps introduce at least a brief interruption. So you cannot guarantee zero downtime; the best you can do is design to minimize it and set a very small RTO, but zero downtime isn’t realistically achievable.

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