AWS Storage Solutions Flashcards

Which S3 storage class is most cost-effective for data accessed about once a year and that can tolerate a several-hour retrieval delay?

Answer: S3 Glacier Deep Archive

Glacier Deep Archive is the lowest-cost class for rarely accessed archival data tolerant of hours-long retrieval.

What is the durability guarantee that Amazon S3 is designed to provide for objects across multiple Availability Zones?

Answer: 99.999999999% (11 nines)

S3 is designed for 11 nines (99.999999999%) of durability by replicating across multiple AZs.

Which EBS volume type is best suited for high-performance NoSQL and relational databases requiring sustained IOPS?

Answer: Provisioned IOPS SSD (io2)

Provisioned IOPS SSD (io2) delivers consistent, high IOPS for I/O-intensive database workloads.

What does enabling S3 Versioning protect against?

Answer: Accidental overwrites and deletions

Versioning keeps multiple variants of an object so accidental overwrites or deletes can be recovered.

Which AWS storage service provides a fully managed elastic NFS file system for Linux EC2 instances?

Answer: Amazon EFS

Amazon EFS is a managed, elastic NFS file system that multiple Linux instances can share.

An EBS volume can normally be attached to how many EC2 instances at once (without Multi-Attach)?

Answer: One instance

A standard EBS volume attaches to a single EC2 instance in the same AZ at a time.

What feature automatically moves S3 objects between access tiers based on changing access patterns without performance impact?

Answer: S3 Intelligent-Tiering

S3 Intelligent-Tiering automatically moves objects between tiers to optimize cost based on access patterns.