Practice Test Geeks(COA) Certified OpenStack Administrator Exam Practice Test
← All COA Flashcard Decks

Implementation & Configuration Flashcards

7 cards from real COA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Implementation & Configuration flashcards as text

  1. What is the effect of setting 'cpu_allocation_ratio = 4.0' in nova.conf?

    Answer: Allows up to 4 virtual CPUs to be allocated for every 1 physical CPU core (overcommit ratio)

    The cpu_allocation_ratio defines how many vCPUs can be over-provisioned per physical core; a value of 4.0 means 4x CPU overcommit.

  2. Which Neutron CLI command creates a new private tenant network with VXLAN type?

    Answer: openstack network create --provider-network-type vxlan

    The '--provider-network-type vxlan' flag on 'openstack network create' specifies VXLAN as the network segmentation type.

  3. Which file must be modified on a Keystone server to add a new service endpoint to the catalog?

    Answer: No file — endpoints are managed via 'openstack endpoint create' stored in the Keystone database

    Service catalog entries (services and endpoints) are stored in the Keystone SQL database and managed through API commands, not static config files.

  4. In a Nova configuration, what is the 'virt_type' option in the [libvirt] section used for?

    Answer: Specifies the hypervisor virtualization type (e.g., kvm, qemu, lxc, xen)

    The virt_type setting tells nova-compute which libvirt virtualization mode to use, with 'kvm' being the default for hardware-accelerated virtualization.

  5. Which OpenStack service provides the API for managing SSL/TLS certificates and secrets?

    Answer: Barbican

    Barbican is the OpenStack Key Manager service, providing secure storage and management of secrets, keys, and certificates.

  6. When configuring Cinder with multiple backends, which config option in cinder.conf enables a specific named backend?

    Answer: enabled_backends

    The 'enabled_backends' option in the [DEFAULT] section of cinder.conf takes a comma-separated list of backend configuration group names to activate.

  7. What is the purpose of the 'openstack server rescue' command?

    Answer: Boots the instance from a specified rescue image to allow recovery of a broken or inaccessible instance

    Server rescue boots the instance with a rescue image as the root disk, mounting the original root disk as secondary storage so you can repair it.