AWS - EC2 (Guaranteed Pass!)

What is Amazon EC2? correct answers Amazon Ec2 is a web service that provides resizable compute capacity in the cloud. Why would my organisation use EC2? correct answers Your organisation should use EC2 to eliminate your need to invest in hardware upfront. Can you explain EC2 to a non-techie? correct answers In the past, a server was like a very expensive hotel. It had only one big room and only one person could stay there. This hotel is like a single server hosting a single operating system. Half the time the occupant of the hotel is out on conferences. He is rarely in his hotel room. He only uses the room when he sleeps. The room is horribly under-utilised. This is similar to the server running a single OS that we mentioned earlier. It's only ever utilised 5 to 10% of the the time. Then on day, someone came up with the idea. Why dont we divide this large room in multiple rooms? Each could be a different sized room offering different qu alities of service depending on the occupant and privacy. This hotel is called Virtualization. It allows multiple people Mr SAP, Mr SQL and MR Exchange to all live in the same hotel separately. Amazon Ec2 takes this to a whole new level of efficiency. Amazon Ec2, allows multiple people to not only live in the same hotel, but allow multiple people to live i What are virtual computing environments known as in EC2? Can you give an analogy? correct answers Virtual computing environments are known as instances in Ec2. Instances are similar to rooms within a hotel suite. What analogy would you use describe EC2, a Host and an Instance? correct answers Amazon Ec2 is similar to the Hilton Hotel. Each suite in the hotel is a Server with each room within a suite being an instance. What are the 4 access methods that you can access EC2? correct answers 1 - Management Console 2 - CLI 3 - HTTP API 4 - SDK's. Why would someone choose to build applications using the SDK over the HTTP API? correct answers The SDK provides the capability to build applications using language specific-API's instead of submitting a request over HTTP or HTTPS. What is an Amazon Machine Image (AMI) and can you give an example of an AMI can contain? correct answers An AMI is a template that contains a software configuration. An AMI can contain an OS, application server or application). What can you launch from an AMI? correct answers From an AMI, you can launch an instance, which is a copy of the AMI running as a virtual server in the cloud.