OpenStack OpenStack Image Service (Glance) & Dashboard (Horizon)

Question 1

Which OpenStack service stores and retrieves virtual machine disk images?

Accepted Answer

Glance

Answer

Swift

Answer

Cinder

Answer

Nova

Question 2

What is OpenStack Horizon?

Accepted Answer

A web-based dashboard providing a graphical interface to OpenStack services

Answer

A command-line interface for managing all OpenStack services

Answer

A monitoring service for OpenStack infrastructure

Answer

A configuration management tool for OpenStack deployments

Question 3

Which disk image format is most commonly used for QEMU/KVM instances in OpenStack Glance?

Accepted Answer

QCOW2

Answer

VMDK

Answer

VHD

Answer

ISO

Question 4

What is the 'visibility' property of a Glance image?

Accepted Answer

Controls who can see and use the image (public, private, shared, community)

Answer

Whether the image is stored in an encrypted format

Answer

The display resolution of the desktop image

Answer

The network visibility zone where the image backend is accessible

Question 5

What is 'cloud-config' user data commonly used for when launching OpenStack instances?

Accepted Answer

Providing declarative configuration instructions to cloud-init for automated instance setup

Answer

Configuring OpenStack service endpoints in the instance

Answer

Setting up Nova placement constraints for the scheduler

Answer

Defining Neutron network policies for the instance's interfaces

Question 6

Where does Glance store image data by default in a basic OpenStack deployment?

Accepted Answer

In the local filesystem of the Glance service node

Answer

In the Nova ephemeral storage on compute nodes

Answer

In the Keystone database

Answer

In a dedicated Neutron storage network