AWS

Question 1

What is AWS?

Answer 1

• Stands for Amazon Web Services

- A secure cloud services platform

Question 2

What is Cloud Computing?

Answer 2

The use of remote servers through a network to do computation tasks like program execution, storage, management and processing of data

Question 3

What is PaaS?

Answer 3

• Platform as a service
• A category of cloud computing services that provides a platform for customers to develop run and manage applications without the complexity of developing the infrastructure associated with developing and launching an application.

Question 4

What is IaaS?

Answer 4

• Infrastructure as a service

- A form of cloud computing that provides a virtualized computing resources over the internet.

Question 5

What is SaaS?

Answer 5

Software as a service is a software distribution model in which a third-party provider hosts applications and makes them available to customers over the internet. (google docs, gmail, etc.)

Question 6

What is EC2?

Answer 6

• Elastic Compute Cloud
• Essentially a virtual machine on a server with a specific allocation for hardware resources based on plans
• The more resources the more expensive
• Used for running a server to host an application that users can connect to.

Question 7

What is EBS?

Answer 7

• Elastic Block Store

- A traditional ‘block’ storage resource that is provisioned to other AWS services.

Question 8

What is AMI?

Answer 8

• Amazon Machine Image - an OS image to run on an EC2, that is the operating system that the ec2 has
• There are a few to choose from including amazon linux, ubuntu, windows, etc.

Question 9

What is ELB?

Answer 9

• Elastic Load Balancing
• A load balancing service for AWS.
• ELB automatically distributes incoming application traffic and scales resources to meet traffic demands.

Question 10

What are the types of ELB?

Answer 10

• Application load balancers
• Network load balancers
• Classic load balancers

Question 11

What is Autoscaling?

Answer 11

A method used in cloud computing where the number of instances for a server scales automatically based on the connection and request load.

Question 12

What is a Security Group?

Answer 12

A virtual firewall that controls the traffic for one or more instances. When an instance is launched you associate a security group to it for it to filter traffic down to only IPs matching that group.

Question 13

What is S3?

Answer 13

• Amazon’s Simple Storage Service.
• Designed with a simple web service interface that can be used to store and retrieve data.
  Can also be used for static web hosting.

Question 14

What is RDS?

Answer 14

• Relational Database Service

- Makes it easy to set up, operate, and scale a relational database like postgreSQL, mySQL, or OracleSQL.

Question 15

Region vs Availability Zones

Answer 15

• AWS Regions are a separate geographical area and has multiple isolated locations that are availability zones
• Availability zones are the locations that are available to put instances
• For example US East is a region, and Ohio and N. Virginia are availability zones.

Question 16

What is resiliency?

Answer 16

A systems capability to handle disaster such as weather, power, or other catastrophe that can affect the systems and their services so that the application can stay available to users.