Work Notes

  Autoboxing  is the automatic conversion that the Java compiler makes between the primitive types and their corresponding object wrapper cl...

  Hashmap vs Hashtable   HashMap is non-synchronized. It is not thread-safe and can’t be shared between many threads without proper synchron...

  What is Amazon S3? PDF RSS Amazon Simple Storage Service (Amazon S3) is an object storage service that offers industry-leading scalabilit...

 VPN AWS Virtual Private Network solutions establish secure connections between your on-premises networks, remote offices, client devices, a...

  - 5 vpc per region - 200 subnet per vpc - 200 route table

What are AWS Security Groups?  An AWS security group  acts as a virtual firewall for your EC2 instances to control incoming and outgoing tra...