To protect an application against the failure of an entire datacenter, a solution should distribute resources across which Azure construct?
A.Availability zones
Availability zones = separate datacenters in one region. Correct for datacenter-level failure.
B.Resource groups
Resource groups are logical containers — they provide no physical redundancy.
C.Management groups
Management groups organize subscriptions for governance — unrelated to availability.
D.Azure subscriptions
Subscriptions are billing/access boundaries, not fault-isolation units.
Why this answer
Availability zones are physically separate datacenters within a region, each with independent power, cooling, and networking. Distributing VMs or services across zones protects against single-datacenter failure — the key zone-vs-region distinction: zones protect within a region; multiple regions protect against regional loss.
Correct answer: A · Last reviewed 2026-02-13
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