Syracuse Sobers is a National Hockey League team in upstate New York. They currently use a mainframe-based application for talent procurement and management. Their team currently visits various schools and universities across the country. When they find an interesting candidate, they enter his profile details in hand held devices. Later the information is faxed to Syracuse, where another set of users enters the data into the mainframe.Given that the Sobers do not want to incur too much
Answer: C
A Philadelphia based cable company is using J2EE for their Customer Management system. The system uses a combination of HTML and JSP for presentation. Java Servlets are used as Controllers. All Servlets have access to a ServletContext object, which functions as a Container to the shared resources of the Servlets. The ServletContext object best exemplifies what design pattern?A Iterator B Mediator C Interpreter D State E Singleton
Answer: E
Since Stateful Session Beans are not pooled as their Stateless counterparts, the container uses Passivation and activation techniques for better resource management. What design pattern is close to the concept of Passivation, as described here?A Composite B Flyweight C Template Method D Command E Memento F Chain of Responsibility
Answer: E
Which of the following do not aid a system’s extensibility?A Modularizing Code B Using well defined software design patterns C Using Servlets to manage distributed database access D Using JSP Scriptlets to locate Enterprise beans E Using Data Access Objects when Session Beans or BMP Entity beans have to communicate to the database.
Choices C and D are correct.
Which of the following statements about Interaction diagrams are true?A Interaction diagrams represent the dynamic view of a system. B Interaction diagrams may represent static or dynamic views of the system. C Interaction diagrams are polymorphic. D Interaction diagrams are isomorphic. E Interaction diagrams only show time ordering of messages. F Interaction diagrams may show the structural organization of the objects that send or receive messages.
Choices A, D and F are correct.
Nopester Inc., a CD manufacturer uses Metallic Corporation for making jewel cases. When the inventory of jewel cases falls under the reorder level, Nopester communicates with Metallic via faxes. Nopester now wants to build a solution for its supply chain management. Metallic uses a legacy system that supports CORBA interfaces for other companies to interface to them with. Metallic’s servers are protected by firewalls and will only let HTTP or HTTPS requests through.What is Nopester’s
Answer: D
-tier applications represent a single point of failure, although typically, changes to one part of the system do not generally affect the whole system. True/False?A True B False
Answer: B
Which of the following are not true about N-Tier Systems?A N-Tier systems are distributed over many systems and hence always present a maintenance problem. B N-Tier systems are generally component based and are therefore quite easy to maintain. C Since N-Tier systems do not use database stored procedures or triggers for business logic processing, they are generally very slow. D Since N-Tier systems are container based, many N-Tier systems can be easily scaled (both vertically and horizontally).
Choices A, C and E are correct.
In general, 1-tier applications are less horizontally scalable than 3-tier applications, although from a scalability point of view, client/server applications are the most scalable. True/False?A True B False
Company ABC Inc. has an existing J2EE application that provides an EJB interface. ABC Inc. is writing a new J2EE based application for enhanced MIS reporting. Which of the technologies listed below would be ideal for this?A RMI/JRMP with JNI B Java IDL C RMI / IIOP D JMS
Answer: C
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