Interview Q&A / AWS & Cloud

1. What is Amazon S3 and what are its storage classes?

   S3 is AWS's object storage. You store files as objects inside buckets and access them by key over HTTPS. Storage classes trade storage cost against access speed and retrieval cost, from S3 Standard for frequently used data to the Glacier classes for archives you rarely read.

   BeginnerIn-depth4 min read
2. What are S3 lifecycle rules and what can they do?

   Lifecycle rules automatically move objects to cheaper storage classes after a set number of days, or delete them. They also clean up old versions and incomplete multipart uploads.

   BeginnerQuick answer1 min read
3. What is the difference between S3 Standard-IA and S3 One Zone-IA?

   Both are for data accessed rarely but needed quickly. Standard-IA stores copies across at least three Availability Zones. One Zone-IA keeps data in a single AZ at lower cost, so it is lost if that AZ is destroyed.

   BeginnerQuick answer1 min read