AWS AWS Storage Solutions 2 — Questions and Answers
Question 1: Which S3 storage class is most cost-effective for data accessed about once a year and that can tolerate a several-hour retrieval delay?
- S3 Standard
- S3 Glacier Deep Archive (Correct answer)
- S3 Standard-IA
- S3 One Zone-IA
Correct answer: S3 Glacier Deep Archive
Glacier Deep Archive is the lowest-cost class for rarely accessed archival data tolerant of hours-long retrieval.
Question 2: What is the durability guarantee that Amazon S3 is designed to provide for objects across multiple Availability Zones?
- 99.9%
- 99.99%
- 99.999999999% (11 nines) (Correct answer)
- 100%
Correct answer: 99.999999999% (11 nines)
S3 is designed for 11 nines (99.999999999%) of durability by replicating across multiple AZs.
Question 3: Which EBS volume type is best suited for high-performance NoSQL and relational databases requiring sustained IOPS?
- Cold HDD (sc1)
- Throughput Optimized HDD (st1)
- Provisioned IOPS SSD (io2) (Correct answer)
- Magnetic (standard)
Correct answer: Provisioned IOPS SSD (io2)
Provisioned IOPS SSD (io2) delivers consistent, high IOPS for I/O-intensive database workloads.
Question 4: What does enabling S3 Versioning protect against?
- Higher storage costs
- Accidental overwrites and deletions (Correct answer)
- Slower upload speeds
- Reduced durability
Correct answer: Accidental overwrites and deletions
Versioning keeps multiple variants of an object so accidental overwrites or deletes can be recovered.
Question 5: Which AWS storage service provides a fully managed elastic NFS file system for Linux EC2 instances?
- Amazon EBS
- Amazon S3
- Amazon EFS (Correct answer)
- Amazon FSx for Windows
Correct answer: Amazon EFS
Amazon EFS is a managed, elastic NFS file system that multiple Linux instances can share.
Question 6: An EBS volume can normally be attached to how many EC2 instances at once (without Multi-Attach)?
- One instance (Correct answer)
- Up to two instances
- Up to ten instances
- Unlimited instances
Correct answer: One instance
A standard EBS volume attaches to a single EC2 instance in the same AZ at a time.
Question 7: What feature automatically moves S3 objects between access tiers based on changing access patterns without performance impact?
- S3 Transfer Acceleration
- S3 Intelligent-Tiering (Correct answer)
- S3 Replication
- S3 Object Lock
Correct answer: S3 Intelligent-Tiering
S3 Intelligent-Tiering automatically moves objects between tiers to optimize cost based on access patterns.
AWS AWS Storage Solutions 2
Which S3 storage class is most cost-effective for data accessed about once a year and that can tolerate a several-hour retrieval delay?