With regard to Amazon EC2, do volumes need to be un-mounted in order to take a snapshot?

Which command can create an IPv4 VPC with a 10.0.0.0/16 CIDR block by using the AWS command line interface?

The following request is submitted to the Amazon E-Commerce Service. What will be the outcome? http://webservices.amazon.com/onca/xml?Service=AWSECommerceService &SearchIndex=Books &Sort=salesrank &Keywords=DVD &ResponseGroup=Medium,Offers &Count=20 &Operation=ItemSearch &AssociateTag=[Your Tag Name] &SubscriptionId=[Your subscription id]

In the AWS Cloud, Amazon Aurora is compatible with which relational database engines?

All AWS accounts, by default, are limited to how many Elastic IP addresses per region?

What is the default number of Amazon RDS Security groups (VPc) that can be created per region for an AWS account?

AWS Virtual Private Cloud (VPC) lets you provision a logically isolated section AWS-cloud where you can launch AWS resources in a virtual network that you define. Which of the following is correct about VPCs ?

Regarding AWS CloudFront, which is the correct statement ?

____ are operating systems running on the Xen virtualization hypervisor?

Amazon RDS for ........... Server now supports ................. Authentication.

You have developed a REST API using AWS API Gateway and configured all resources/methods to call a previously created Lambda function. The API has been already deployed once to a Stage and it's working properly. Which is NOT correct to say about that scenario ?