12 a) s3 bucket is an object storage space like google drive..you can store ur files. There you create buckets then upload ur objects into that..
Its highly avalible and durable 99.999999999%
11 ans) in aws we have 3 lbs
1. Classical load balncer simply u create lb attach backend servers to that, if someone hit that lb it will redirect trafic to backend server..
2. Application Lb,: supports path based routing and adv
3. Network lb: provides more bandwidth compare to above 2, used tcp protocol