Tricky AWS Architect Multiple choice Questions and Answers pdf

21. Explain what is AMI?
AMI stands for Amazon Machine Image.  It’s a template that provides the information (an operating system, an application server and applications) required to launch an instance, which is a copy of the AMI running as a virtual server in the cloud.  You can launch instances from as many different AMIs as you need.

22. Mention what is the relation between an instance and AMI?
From a single AMI, you can launch multiple types of instances.  An instance type defines the hardware of the host computer used for your instance. Each instance type provides different compute and memory capabilities.  Once you launch an instance, it looks like a traditional host, and we can interact with it as we would with any computer.

23. What does an AMI include?
An AMI includes the following things
A template for the root volume for the instance
Launch permissions decide which AWS accounts can avail the AMI to launch instances
A block device mapping that determines the volumes to attach to the instance when it is launched

24. How can you send request to Amazon S3?
Amazon S3 is a REST service, you can send request by using the REST API or the AWS SDK wrapper libraries that wrap the underlying Amazon S3 REST API.

25. Explain can you vertically scale an Amazon instance? How?
Yes, you can vertically scale on Amazon instance. For that
=> Spin up a new larger instance than the one you are currently running
=> Pause that instance and detach the root webs volume from the server and discard
=> Then stop your live instance and detach its root volume
=> Note the unique device ID and attach that root volume to your new server
=> And start it again

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