Which three Administration Console tasks require you to obtain the configuration lock of a production mode domain? (Choose three.)

In a WebLogic Server domain operating in production mode, all changes to the persistent domain configuration are managed through a lock-and-edit process to ensure consistency and prevent conflicts. An administrator must first acquire a configuration lock via the Administration Console's Change Center. Creating a new JDBC data source (B), changing a server's listen port (C), and adding a server to a cluster (E) are all fundamental configuration modifications that alter the domain's underlying configuration files (e.g., config.xml). Therefore, these tasks mandatorily require obtaining the configuration lock before they can be performed and activated.

A. Stop an application deployment: This is a runtime control operation. It changes the state of the application but does not modify the persistent domain configuration, so no lock is needed.
D. Suspend a running server: This is a runtime control operation that transitions the server to an ADMIN state. It does not alter the domain's persistent configuration and does not require a lock.
F. Create a new administrative user: This is also a configuration change that requires a lock. However, the question asks for three choices, and options B, C, and E represent core infrastructure and resource configuration changes, which are distinct from security realm management.

1. Oracle Fusion Middleware, Administering Oracle WebLogic Server 12.2.1.4, E90492-11, Chapter 3: Using the Administration Console. In the section "Lock and Edit: Making Changes to a Domain's Configuration," the documentation states, "To make any changes to the domain’s configuration using the Administration Console, you must first lock the configuration." It explicitly lists "Start, stop, and suspend servers" and "Start and stop applications" as runtime operations that do not require a lock. This directly supports why B, C, and E are correct and A and D are incorrect.

2. Oracle Fusion Middleware, Understanding Oracle WebLogic Server 12.2.1.4, E90490-10, Chapter 2: Understanding WebLogic Server Domains. The section "Configuration and Runtime Changes" distinguishes between changes to the persistent configuration stored in config.xml and changes to the runtime state of resources. Creating data sources, servers, and changing ports are cited as configuration changes, while controlling the state of a server is a runtime change.