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Head First EJB-CH-3-Mock Exam Query

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Head First EJB,Chapter-3,Page-170,COFFE CRAM-MOCK EXAM-q3

Q:Given a Remote Client 'R' that has valid references to sesion bean 'A' and 'B'and given that A is a local clint to B,which statements are true?

A)R cannot pass his reference for A to B
B)A cannot pass his reference for B ,to R
C)A cannot invoke methods on B
D)B cannot invoke methods on R


Can anyone of explain to me in detail about "What this Question means" and How they are coming to the Ans-B,D.and Why others are wrong.

Please help me to solve this.

SCJP 1.4(85%)
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