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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


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