Interview Q&A / AWS & Cloud
AWS & Cloud interview questions
EC2, S3, Lambda, IAM and VPC basics, with when to pick which service.
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- 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 - What is the difference between Amazon EFS and Amazon EBS?
EBS is a block disk attached to one EC2 instance in one AZ. EFS is a managed shared file system using NFS that many instances across multiple AZs can mount at the same time.
BeginnerQuick answer1 min read