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Exam : Sun 310-051
Title : Sun Certified Enitrprise Architect for J2EE(TM)Technology


1. Which two services does EJB provide? (Choose two.)
A. HTML generation
B. transaction services
C. lifecycle management
D. remote-method invocation
Answer: BC

2. Which two features of a firewall might interfere with the operation of IIOP? (Choose two.)
A. port filtering
B. load balancing
C. address filtering
D. network address translation
Answer: AC

3. These are the requirements for your new system:
All current business logic is in the form of database-stored procedures.
All current and new business logic is to be migrated to EJB.
The system is an online, Web-based system. The UI is HTML-based.
There are three EJBs: Customer, Order, and Account. There is one Java object, ShoppingList, which holds the current list of ordered items.
Only account and order data are stored in the database.
The Customer EJB maintains a reference to the ShoppingList.
Which three architectural decisions adhere to the requirements? (Choose three.)
A. make Order and Account an entity EJB
B. make Customer a stateful-session EJB
C. make Customer a stateless-session EJB
D. make Customer an entity EJB and put business logic in it
E. make Customer a session EJB and put business logic in it
F. use the Container Managed Persistence policy for the Customer session EJB
Answer: ABE

4. Your client is a bank that wants to allow its customers to access their bank accounts over the Internet. Given the following requirements, which protocol communicates with the Web browsers?
Confidential information must be protected.
Customers will access their account using only a simple Web browser with no extensions.
A. IIOP
B. HTTP
C. SNMP
D. HTTPS
Answer: D

5. What are two features of IIOP? (Choose two.)
A. It is secure.
B. It is connnectionless.
C. It is connection-based.
D. It is used for load balancing.
E. It is used for hypermedia requests.
F. It is used for remote-object communications.
Answer: CF

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