OpenStack OpenStack Compute (Nova)

Question 1

Which OpenStack service manages the lifecycle of virtual machine instances?

Accepted Answer

Nova

Answer

Cinder

Answer

Neutron

Answer

Ironic

Question 2

What is a Nova 'flavor' in OpenStack?

Accepted Answer

A hardware profile defining vCPUs, RAM, and disk size for VM instances

Answer

A pre-installed software configuration for a VM image

Answer

A set of cloud-init scripts run at instance boot

Answer

A network configuration template applied to new VMs

Question 3

What is Nova's scheduler responsible for?

Accepted Answer

Selecting the most appropriate compute host for a new VM based on filters and weights

Answer

Scheduling periodic Cron jobs on compute nodes

Answer

Managing the timeline of VM lifecycle state changes

Answer

Distributing API requests across multiple Nova API endpoints

Question 4

What hypervisor does Nova use by default in most production deployments?

Accepted Answer

KVM (Kernel-based Virtual Machine)

Answer

VMware ESXi

Answer

Microsoft Hyper-V

Answer

Xen

Question 5

What is the purpose of Nova's 'nova-conductor' service?

Accepted Answer

Providing a database access proxy to prevent compute nodes from directly accessing the Nova database

Answer

Conducting live performance monitoring of VM instances

Answer

Managing the lifecycle of Nova API workers

Answer

Coordinating storage attachment between Nova and Cinder

Question 6

What is 'live migration' in Nova?

Accepted Answer

Migrating a running VM instance from one compute host to another without downtime

Answer

Moving a VM's persistent Cinder volume to a different storage backend

Answer

Upgrading a VM's OS while it continues running

Answer

Changing a VM's flavor while the instance is active