What role do availability zones play in achieving a high level of resiliency for cloud-based solutions?

Question

Options

• AThey primarily serve to reduce operational costs by sharing resources across zones
• BThey ensure that data is automatically compliant with all regional regulations
• CThey offer isolated environments within a region to provide fault tolerance
• DThey are used to limit the geographical scope of solutions to a single locale

• A
  8% (2)
• B
  4% (1)
• C
  79% (19)
• D
  8% (2)

Explanation

Availability zones (AZs) are physically separate data centers within the same cloud region, each with independent power, cooling, and networking. This isolation means a failure in one zone - hardware crash, power outage, natural disaster - doesn't cascade to others, giving you fault tolerance and keeping your solution running even when part of the infrastructure fails.

Why the distractors are wrong:

• A is wrong because AZs are about resilience, not cost savings - spreading across zones typically increases cost.
• B is wrong because compliance is handled through policies, data governance, and region selection, not AZ design.
• D is the opposite of reality - AZs exist within a region and are used to spread a solution across multiple locations, not restrict it to one.

Memory tip: Think of AZs as "backup buildings in the same city." If one building loses power, the others keep the lights on - same city (region), separate structures (zones), resilient outcome.

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