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Disaster Recovery Vocabulary

5 questions · Multi-Region Deployment Language

1. An architect describes four DR tiers. Which ordering correctly represents increasing recovery speed (slowest to fastest)?

Multi-site active/active → Warm standby → Pilot light → Backup and restore Backup and restore → Pilot light → Warm standby → Multi-site active/active Pilot light → Warm standby → Backup and restore → Multi-site active/active

2. A team announces: "We're conducting a DR drill next Saturday." What is the purpose of a DR drill?

To update the disaster recovery documentation with the latest system architecture diagrams To test the DR plan in practice — verifying that failover actually works within the stated RTO/RPO and that the team can execute the runbook under pressure To train new engineers on using the monitoring dashboards during an incident

3. A CTO asks engineering: "Can you explain our business continuity posture?" Which answer best frames the response?

Business continuity is the same as disaster recovery — you can use the terms interchangeably Business continuity is the broader capability to keep essential business functions running during and after a disruption — DR is one component, focused specifically on IT systems recovery Business continuity refers only to the customer communication plan during an outage

4. The engineering team needs to explain RTO and RPO to business stakeholders who are not technical. Which framing is most effective?

"RTO is how long failover takes; RPO is the replication interval between regions." "RTO answers: 'How long can the business survive without this system?' RPO answers: 'How much data loss can the business accept in the worst case?'" "These are technical SLA metrics that engineering sets — business does not need to be involved in defining them."

5. The term "pilot light" in disaster recovery comes from an analogy. What does the pilot light metaphor refer to?

A small indicator light on monitoring dashboards that shows the DR region is healthy Like the small flame kept burning in a gas appliance, a minimal core of the system is kept running in the DR region, ready to ignite into full capacity when needed A signal flare pattern used during DR drills to indicate that a failover has been initiated

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