AIncorrect
Each Region consists of exactly one AZ.
This is incorrect. A Region consists of multiple AZs (typically a minimum of three). A description stating that one Region contains only one AZ is false.
Which TWO statements about AWS Regions and Availability Zones are correct? (Choose TWO.)
1 / 1
Select all that apply
CorrectB, E
Explanation
A question asking for two correct statements about Regions and AZs.
- 1「Regions and Availability Zones」Tests understanding of the global infrastructure hierarchy and AZ interconnection and fault tolerance
BCorrect
AZs within the same Region are interconnected by a low-latency dedicated network.
Correct. AZs within the same Region are interconnected by a high-bandwidth, low-latency dedicated network. This enables synchronous replication and other operations that span multiple AZs.
CIncorrect
An edge location is the same thing as an AZ.
This is incorrect. An edge location is a content delivery point (delivery node) deployed by CloudFront around the world to cache content close to end users and deliver it with low latency. An AZ is a group of data centers used to run applications and store data — the purpose, placement, and count (edge locations far outnumber AZs) are all different. Describing them as the same is false.
DIncorrect
Customers cannot choose the Region where their data is stored.
This is incorrect. Customers can choose the Region where their data is stored themselves. A statement saying they cannot is false.
ECorrect
Deploying across multiple AZs increases resilience against a single AZ failure.
Correct. When an application is deployed across multiple AZs, even if one AZ experiences a failure, the other AZs can continue processing, which improves high availability and fault tolerance.
Key Takeaway
Frequently tested true/false: a Region contains multiple AZs (minimum 3), AZs are interconnected by a low-latency dedicated link, multiple AZs improve fault tolerance, customers can choose their Region, edge locations are NOT AZs.