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Braindumps of 310-051
Sun Certified Enterprise Architect for J2EE Technology, Knowledge-based

 

Exam Questions, Answers, Braindumps (310-051)

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QUESTION 1
Your company's employee assistance program (EAP) application is now required to be deployed on the Web. The following are characteristics and requirements of the new system: • The UI is an off-the-shelf, unsigned terminal-emulator applet.
• The applet communicates with a terminal server using a proprietary TCP/IP-based protocol.
• The terminal server sits behind the corporate firewall and listens on port 10001.
• The only configurable items for the applet are the host IP and port of the terminal server.
• You company's firewall only allows traffic through on port 80 for HTTP and port 443 for HTTPS.
Problem: The applet is unable to communicate through the firewall.
Which two statements about this architecture are false? (Choose two)
A. If the applet were signed, it could communicate directly with the terminal server.
B. If the terminal server were signed, the applet could communicate with it directly on port 10001.
C. The applet can communicate with the terminal server if the firewall is modified to allow traffic through on port 10001.
D. The applet can communicate with the terminal server if it is configured to communicate with the terminal server on port 80 or 443.
Answer: A, B
QUESTION 2
Which two improve software maintainability? (Choose two)
A. Code factoring
B. Reusing components
C. Public instance variables
D. Dependencies between components
Answer: A, B
QUESTION 3
Your supply chain software currently runs a standalone application which communicates to the backend services using IIOP.
The new requirements for the software are:
• The client software must run as an applet.
• The user's firewall will only allow port 80 and 443 traffic through its firewall.
• All the backend services will be CORBA-based.
• A Web server sits in front of the COBRA services.
• The backend Web server runs on port 80 and 443.
Which two solutions support the new requirements? (Choose two)
A. You convert the application to an applet and use IIOP to communicate with the backend services.
B. You convert the application to an applet running outside the browser and send XML through port 443.
C. You convert the application to an applet and use IIOP tunneled through HTTP to communicate with the backend services.
D. You convert the application to an applet and use HTTPS to communicate with a servlet which communicates with the backend services using IIOP.
Answer: C, D
QUESTION 4
What decreases software maintainability? (Choose two)
A. Code reuse
B. Data sharing
C. High coupling
D. Code factoring
Answer: B, C
QUESTION 5
You are in the process of migrating your existing system to a new architecture to support your growing user base. The current system consists of:
• Browser-based HTML./JavaScript UI.
• One Web server instance.
• One J2EE application server instance.
• A database
The new architecture has the following requirements:
• Browser-based HTML./JavaScript UI.
• Cluster of Web servers.
• Cluster of J2EE application servers.
• A database.
Which two statements are true? (Choose two)
A. Clustering increases scalability.
B. Clustering impacts availability, not scalability.
C. DNS round-robin can be used to load-balance the Web servers.
D. Clustering the application servers provides automatic EJB fault-tolerance.
Answer: A, C
QUESTION 6
What increase software maintainability? (Choose two)
A. Code reuse
B. Data sharing
C. High coupling
D. Code factoring
Answer: A, D

310-051


 

 

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