"in which of two case interaction is remote?" I have no clue what you mean, but I'll give it a shot... A Business Delegate communicating with a Session Facade may be over a remote connection. A Service Locator can use JNDI to locate remote services. A Transfer Object could be transfered from a remote service to the presentation tier to limit the number of calls needed to retrieve data. I'm really just shooting off a bunch of random statements in a best effort to answer whatever it is you were asking. Hope I covered it.
"Also can we put Expression Language in each of case?" EL has nothing to do with the patterns, though I'm curious what inspired such a question.
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