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6 questions in Failover.

Quiz

A digital bank needs automatic failover for availability, but some operations cannot safely execute twice. Which components fail over automatically, which degrade, and which stop?

A load balancer health check is changed from "the process answers" to "the process can reach its database and its cache". The dependency has a brief regional problem. What happens to the fleet, and why do load balancers deliberately fail open?

A regional failover completes in 90 seconds per the runbook - the database is promoted and traffic is redirected - but the application stays broken for 25 minutes. The new region's services are healthy and idle. Where is the time going?

A search platform's index-serving region becomes degraded but not fully down - elevated latency and partial errors. Should traffic fail over automatically? Analyse the risks either way.

The business asks for multi-region active-active. Walk through the decision and what it actually requires.

Your database primary is unreachable from the monitoring system but is still serving some clients. Do you fail over?