Code 401: Class # - Name

Questions

What is the difference between a FIFO and standard queue? A standard queue operates with a first in first out principal aka FIFO.
How can the server be assured a message was properly received? A server can request that a recipient sends a confirmation of receipt.
What classic design pattern is represented by event driven programming? A messaging service is a classic event driven architecture.
how do you test an event driven system? Run multiple clients and confirm that they are communicating appropriately.

Server A computer that provides information or resources to a client

Pub/Sub A software architecture where messages are published to all subscribed clients

WRRC Web Request Response Cycle

Operating systems are software that controls hardware
Virtual Machine is software that allows an operating system to be run within another operating system
- Virtual Box
- VM Ware

EC2 (Amazon Elastic Compute Cloud) web service that provides secure, resizable compute capacity in the cloud
Increase or decrease capacity in minutes
99.99% availability in each region

Elastic Beanstalk spins up virtual servers
Each virtual server is totally isolated from other software running on the hardware
Setup
- First choose operating system
- Then choose instance type (computing power and optimization)
- Configure instance
Connecting to the instance
- Navigate to the directory storing the key file
- $ssh -i <name of the key pair> <username> <password>
- To change the protection on the key pair
  - $chmod 400 <path to the keypair>