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 an Elastic IP address and how is it different from a normal public IP on EC2?
A normal public IP is assigned from AWS's pool and can change when the instance is stopped and started. An Elastic IP is a static public IPv4 address you own in your account until you release it and can remap to another instance.
BeginnerQuick answer1 min read - What is the difference between an internet gateway and a NAT gateway?
An internet gateway lets resources with public IPs in a public subnet talk to the internet in both directions. A NAT gateway lets private-subnet instances start outbound connections, such as updates, while blocking inbound connections from the internet.
BeginnerQuick answer1 min read