Cloud Computing and Virtualization Flashcards

What is 'cloud bursting'?

Answer: Automatically using public cloud resources when private cloud capacity is exceeded

Cloud bursting lets workloads overflow from a private cloud to a public cloud during peak demand.

Which storage type in cloud environments provides block-level storage commonly used for databases?

Answer: Block storage

Block storage presents raw volumes to VMs, making it ideal for databases that require low-latency I/O.

What is the primary purpose of a Virtual Private Cloud (VPC)?

Answer: To provide an isolated network segment within a public cloud

A VPC creates a logically isolated network in the public cloud where you control IP ranges, subnets, and routing.

In containerization, what does a container image contain?

Answer: Application code, runtime, libraries, and configuration bundled together

A container image packages everything the application needs to run except the OS kernel, which is shared.

Which cloud cost model charges based on actual usage with no upfront commitment?

Answer: On-demand pricing

On-demand pricing lets you pay by the hour or second for resources without long-term contracts.

What is 'live migration' in virtualization?

Answer: Moving a running VM from one physical host to another without downtime

Live migration (e.g., vMotion) transfers a running VM's memory and state to another host with no service interruption.

Which cloud networking component acts as a virtual firewall controlling inbound and outbound traffic at the instance level?

Answer: Security Group

Security groups are stateful firewalls applied at the instance level, allowing you to specify allowed traffic rules.