A cloud architect must recommend an architecture approach for a new medical application that requires the lowest downtime possible. Which of the following is the best application deployment strategy…

Question

Options

• ATwo different availability zones (per region) using an active-active topology in two different regions
• BFour different availability zones using an active-passive topology in a single region
• CFour different availability zones using an active-active topology in a single region
• DTwo different availability zones (per region) using an active-passive topology in two different

• A
  57% (24)
• B
  7% (3)
• C
  24% (10)
• D
  12% (5)

Explanation

For the lowest possible downtime, the best strategy is active-active deployment across two geographically separate regions, each spanning two availability zones. In an active-active model, all nodes handle live traffic simultaneously - there is no failover delay since no node is idle. Spreading across two regions means even a complete regional disaster (data center fire, major outage) does not bring down the application. Option B (four AZs, active-passive, single region) wastes capacity and still fails if the entire region goes down. Option C (four AZs, active-active, single region) is strong but a full regional outage eliminates all availability zones. Option D (two regions, active-passive) still introduces failover lag and relies on a standby region activating correctly under pressure.

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