Oracle Database Administration 2019 Certified Professional — Question 11

Which two actions guarantee that time is synchronized properly on all nodes in a cluster after installing Oracle Grid Infrastructure 19c? (Choose two.)

Answer options

• A. If network time protocol (NTP) time servers are unreachable on any cluster node, then Oracle Cluster Time Synchronization Service (CTSSD) will start automatically in active mode when the clusterware is started.
• B. Configure network time protocol (NTP) on all cluster nodes, and then start the Oracle Cluster Time Synchronization Service (CTSSD) in active mode on all cluster nodes.
• C. If network time protocol (NTP) is not configured properly on all cluster nodes, then Oracle Cluster Time Synchronization Service (CTSSD) will start automatically in active mode when the clusterware is started.
• D. Configure network time protocol (NTP) on all cluster nodes; Oracle Cluster Time Synchronization Service (CTSSD) will then start automatically in observer mode when the clusterware is started.
• E. Deactivate network time protocol (NTP) on all cluster nodes; Oracle Cluster Time Synchronization Service (CTSSD) will then start automatically in active mode when the clusterware is started.

Correct answer: D, E

Explanation

Configuring NTP on all cluster nodes ensures that the time is synchronized correctly, and if NTP is not active, the CTSSD will start in observer mode. Deactivating NTP allows CTSSD to start in active mode, which is necessary for time synchronization in the absence of NTP. The other options either incorrectly state how CTSSD operates or do not ensure proper synchronization.