An Engineering firm is looking for storage capacity with an Amazon S3 bucket for saving all its project documents. All the data will be stored for a long duration, but the firm is unsure of the access pattern for this data. Which of the storage class will provide a cost-effective solution without performance impact?

Answer options:

A.S3 Intelligent-Tiering
B.S3 Standard-IA
C.S3 Standard
D.S3 One Zone-IA

Correct Answer – A
S3 Intelligent-Tiering storage class can provide a cost-effective, high-performance option when the access pattern is unknown. Data is automatically moved between frequently accessed & in-frequently accessed based upon data usage pattern with this class.
Option B is incorrect as if data is frequently accessed, using the S3 Standard-IA storage class will incur additional cost.
Option C is incorrect as if data is infrequently accessed, using the S3 Standard storage class will be costly.
Option D is incorrect as using the S3 One Zone-IA storage class will make data less resilient & chances of data loss with failure in one AZ.
For more information on Amazon S3 Storage Class, refer to the following URL-
https://docs.aws.amazon.com/AmazonS3/latest/dev/storage-class-intro.html