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Which statement about an Availability Zone (AZ) in Azure is correct?
AAn AZ is a single rack of servers without redundancy
BAn AZ is a logical billing construct with no physical infrastructure
CAn AZ spans multiple Azure regions to provide global redundancy
DAn AZ is one or more physically separate datacenters within an Azure region, each with independent power, cooling, and networking
Answer & Solution
Correct answer: D. An AZ is one or more physically separate datacenters within an Azure region, each with independent power, cooling, and networking
AZs are physically isolated datacenters inside a single region with independent power/cooling/network. They never span regions, are not billing constructs, and aren't single racks. Deploying across AZs gives a workload zone-failure tolerance.
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