Here Im meeting you with questions in my second round.
1) Why do we create clusters? what is the use and can you explain multicasting?
2) Work manager role in WebLogic
3) Garbage collection in JAVA.
4) Datasource and Pooling concept?
5) JMS, connection factories and queues.
6) Apache configuration.
7) Trouble shooting question. How will you react when server is not responding?
8) memory management.