AWS Certified Cloud Practitioner — Question 258

Which AWS services provide high availability across multiple Availability Zones by default? (Choose two.)

Answer options

• A. Amazon EC2
• B. Amazon Elastic Block Store (Amazon EBS)
• C. Amazon Elastic File System (Amazon EFS)
• D. Amazon Redshift
• E. Amazon S3

Correct answer: C, E

Explanation

Amazon Elastic File System (Amazon EFS) and Amazon S3 are designed to provide high availability and durability across multiple Availability Zones by default. In contrast, Amazon EC2, Amazon EBS, and Amazon Redshift do not guarantee cross-AZ availability unless specifically architected to do so.