AWS Certification Exam Tips for S3

S3 Storage Classes:

S3(Frequently Accessed, Durable, Immediately Available)

S3 -IA (Infrequently Accessed, Durable, Immediately Available)

S3 One Zone - IA (Only for one availability zone and cheaper then S3-IA)

Glacier - Archived data, you need to wait 3-5 hours before accessing.

Core fundamentals of an S3 object:

1) Key (name)

2) Value (data)

3) Version ID

4) Metadata

5) Subresources 

- ACL

- Torrent

Object-based storage only (for files).

Not allowed installing an OS.

Buckets:

Buckets must universal name space.

S3, S3-IA, S3 reduced redundancy storage.

HTTP 200 code after upload successfully.

Encryption

l Client Side Encryption

l Server Side Encryption

n Server side encryption with Amazon S3 Managed key (SSE-S3)

n Server side encryption with KMS (SSE-KMS)

n Server side encryption with Cunstomer Provided Keys (SSE-C)

Control access to buckets using either a bucket ACL or using Bucket Polices

Buckets are private by default and all objects stored inside them are private.

Read more : 

https://docs.aws.amazon.com/AmazonS3/latest/dev/Welcome.html