Which sync is triggered when an administrator performs any create, update, or delete operation on...

 A push sync is triggered when an administrator performs any create, update, or delete operation on a specific configuration item. A push sync sends the configuration changes to all the nodes in the PCCE deployment. A push sync is also triggered when an administrator adds or removes a node from the deployment.

References:

Troubleshooting Cisco Contact Center Enterprise (CCET), page 2-9

Implementing Cisco Contact Center Enterprise (CCEI), page 2-10