Study SAP-C02 Reliable and Resilient Architectures: key concepts, common traps, and exam decision cues.
Enterprise resilience questions usually become easier once you force the stem to answer two things: how quickly the system must recover and how much data loss is acceptable. Those are RTO and RPO. SAP-C02 expects you to translate those targets into the right AWS recovery pattern.
| Need | Strongest first fit | Why |
|---|---|---|
| low-cost recovery with longer downtime tolerance | backup and restore | cheapest but slowest continuity lane |
| minimal critical core always available | pilot light | recovery core stays warm |
| faster recovery with partially live environment | warm standby | scaled-down active environment |
| very low downtime and stronger regional continuity | multi-site or active-active style pattern | highest readiness and cost |
| Pattern | What it solves | What it does not guarantee |
|---|---|---|
| backup | restore prior data state | low downtime by itself |
| pilot light | faster than restore-only by keeping core pieces ready | near-zero downtime |
| warm standby | quicker regional recovery than pilot light | full active-active behavior |
| multi-site | strongest regional availability posture | lowest operating cost |
| Trap | Better rule |
|---|---|
| picking the most complex DR pattern without the business requirement | continuity should match the stated RTO / RPO |
| answering uptime needs with backup alone | backup is not the same as failover readiness |
| ignoring scale-up versus scale-out | resilience and elasticity decisions often sit together |
| forgetting that automation matters in recovery | strong answers include automatic recovery or tested failover mechanics |
RTO and RPOReliability posture questions usually start with downtime and cost tolerance. If downtime can be longer and budget matters, backup and restore may be enough. If you need fast regional recovery with only core services always live, think pilot light. If you need low downtime and high readiness, move toward warm standby or multi-site. SAP-C02 usually rewards matching the DR pattern to business targets instead of jumping to the most expensive design.