Microsoft Azure Architect Design (AZ-304) Practice Test

To ensure that a web application using Azure Blob storage remains cost-effective while delivering files regionally, which storage option should be deployed?

1. Standard Performance Tier

2. Premium Performance Tier

3. Read-Access Geo-Redundant Storage (RA-GRS)

4. Geo-Redundant Storage (GRS)

The correct answer is: Read-Access Geo-Redundant Storage (RA-GRS)

Using Read-Access Geo-Redundant Storage (RA-GRS) for Azure Blob storage is a prudent choice for maintaining cost-effectiveness while ensuring regional accessibility for a web application. RA-GRS not only provides standard geo-redundancy, which protects against regional outages by automatically replicating data to a secondary region, but it also allows for read access to the data in that secondary region. This means that if the primary region experiences issues, users can still access the stored files from the secondary location without incurring additional downtime or cost related to data access. This storage option balances cost and performance as it is less expensive than the Premium Performance Tier, which is designed for high-performance applications needing low latency. The Standard Performance Tier, while cost-effective, does not offer the same level of redundancy and accessibility features that RA-GRS does. Furthermore, Geo-Redundant Storage (GRS) provides redundancy but does not enable read access from the secondary region, which could lead to a less favorable experience for users in the event of a primary region issue. RA-GRS ensures high availability and disaster recovery without significantly increasing costs, making it the best option for scenarios that require both accessibility and cost efficiency. This combination of features makes RA-GRS particularly suited for