Explanation
The concept of shares within a cloud environment is used to mitigate and control the request for resource allocations from customers that the environment may not have the current capability to allow. Shares work by prioritizing hosts within a cloud environment through a weighting system that is defined by the cloud provider.
When periods of high utilization and allocation are reached, the system automatically uses scoring of each host based on its share value to determine which hosts get access to the limited resources still available. The higher the value a particular host has, the more resources it will be allowed to utilize.

With PaaS providing a fully configured and managed framework, auto-scaling can be implemented to programmatically adjust resources based on the current demands of the environment.

Billing for an audit, or other cost-related items, would not be part of an audit scope statement and would instead be handled prior to the actual audit as part of the contract between the organization and auditors.
Reports, exclusions to the scope of the audit, and required certifications on behalf of the systems or auditors are all crucial elements of an audit scope statement.

A virtual machine is ultimately an image file residing a file system. Because of this, even when a virtual machine is "powered off," it is still susceptible to attacks and modification. A physical server that is powered off would not be susceptible to attacks.

Explanation
DNSSEC does not require any additional DNS queries to be performed. The DNSSEC integrity checks and validations are all performed as part of the single DNS lookup resolution.