Practice Test Geeks(COA) Certified Office Administration Practice Test
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Troubleshooting & Problem Resolution 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 Troubleshooting & Problem Resolution flashcards as text

  1. A Cinder backup operation completes but restoring from it fails with 'Invalid backup'. Which component's logs should be checked first?

    Answer: /var/log/cinder/backup.log

    The cinder-backup service handles backup and restore operations, so its log is the authoritative source for backup integrity failures.

  2. After a power failure, several instances show as 'SHUTOFF' in Nova but are actually running on the hypervisor. Which command reconciles Nova's view with the actual hypervisor state?

    Answer: nova reset-state --active

    'nova reset-state --active' forces Nova's database record to match the hypervisor reality without touching the running VM.

  3. An OVS (Open vSwitch) agent on a compute node shows as 'DOWN' in Neutron. What is the correct sequence of steps to recover it?

    Answer: Restart the neutron-openvswitch-agent service, then verify with openstack network agent list

    Restarting the OVS agent service re-registers it with the Neutron server; confirming with 'network agent list' verifies successful recovery.

  4. A user cannot create snapshots of a running instance, receiving 'Snapshot not supported'. What is the most likely cause?

    Answer: The image is based on a volume-backed instance

    Volume-backed (boot-from-volume) instances do not support Nova snapshots the same way; users must create a Cinder volume snapshot instead.

  5. Which log file on the controller node should be inspected when Glance image uploads fail with HTTP 500 errors?

    Answer: /var/log/glance/api.log

    The glance-api.log records all API request errors including upload failures, making it the first file to inspect for HTTP 500 responses.

  6. A tenant complains that DNS resolution is broken inside their instances. The DHCP agent is running and leases are being issued. What should you check next?

    Answer: The dns_nameservers attribute of the subnet

    When DHCP works but DNS fails, the subnet's dns_nameservers configuration is the most common culprit — missing or incorrect entries cause broken resolution.

  7. You need to diagnose why a specific tenant's network traffic is being dropped at the compute node level. Which tool directly inspects OVS flow rules on the host?

    Answer: ovs-ofctl dump-flows br-int

    'ovs-ofctl dump-flows br-int' dumps all OpenFlow rules on the integration bridge, letting you trace where tenant traffic is being dropped.