Creating and Managing VMs in OpenStack JN0-214 Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   What is the purpose of user data when launching a virtual machine instance in OpenStack?

   • ATo store the instance's logs for later retrieval
   • BTo define the instance's network security rules
   • CTo specify the instance's flavor and image
   • DTo provide a script or configuration that the instance runs on first boot
   Reveal Solution Discussion Select an answer first
2. 22expert · hard

   An administrator has lost the private key for a running Linux VM in OpenStack. The VM was created with a key pair, and the administrator needs to regain SSH access. The VM is running a production application that cannot be stopped. What is the most appropriate course of action?

   • AStop the VM, create a snapshot, and launch a new VM from the snapshot with a new key pair.
   • BCreate a new key pair in OpenStack and associate it with the VM.
   • CUse the VNC console to log in and add a new public key to the authorized_keys file.
   • DUse the 'openstack server set --key-name' command to change the key pair.
   Reveal Solution Discussion Select an answer first
4. 23foundation · easy

   Which OpenStack CLI command creates a snapshot of a virtual machine instance?

   • Aopenstack server image create
   • Bopenstack image create
   • Copenstack server snapshot
   • Dopenstack server backup
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5. 24foundation · easy

   Which OpenStack CLI command creates a new key pair?

   • Aopenstack keypair create
   • Bopenstack keypair new
   • Copenstack keypair generate
   • Dopenstack keypair add
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6. 25expert · hard

   A VM running a critical batch job is in a 'PAUSED' state. The administrator needs to free up compute resources on the host for another workload, but must be able to resume the batch job later without losing its in-memory state. The batch job has been running for 6 hours and cannot be restarted from scratch. Which action should the administrator take?

   • ACreate a snapshot of the instance, then delete it to free resources.
   • BSuspend the instance to persist its state to disk, then resume it later.
   • CResize the instance to a smaller flavor to reduce resource usage.
   • DStop the instance and restart it when resources are available.
   Reveal Solution Discussion Select an answer first