Which of the following are benefits of Server Clustering? A ReplicationB High SecurityC Easy ManageabilityD Load BalancingE
Choices A, D and E are correct. Through the use of replicas, server clusters increase the reliability and availability of a system. They provide a fault tolerance mechanism with load distribution
CORBA is a standard for A Messaging using virtual channels called QueuesB Standardized development practicesC Messaging using virtual channels called topicsD Accessing distributed object
Choice D is correct. Common Object Request Broker Architecture (CORBA) is a standard for distributed communication involving applications written using different languages. Hence choice D is
HTTPS is defined as A HTTP with SecurityB HTTP on secure lineC HTTP over SSLD HTTP with SSL
Choice C is correct HTTPS stands for HTTP over SSL. With HTTPS, SSL sits above the TCP-IP layer and below the application protocol layer. Hence choice C is correct.
In P2P, clients send messages to: A A designated queueB Multiple QueuesC A specific node for redistribution to subscribersD CORBA compliant ORB
Choice A is correct. P2P or Point to Point messaging is used for one to one communication between two components or applications. In the P2P model, message producers send messages to a designated
Happy Joe Banking Corporation is building a Banking application to provide online access to their account holders. They have chosen 2 SUN 450s for their web server cluster and 1 SUN E10000 for their application server. The business requirements indicate that to become a customer, a person must have at least a primary checking account with the bank. Further since the customer will be using the Internet to view confidential information, security is considered paramount.What do you understand
Choice D is correct. Successful software architecture deals with addressing the non-functional service level requirements of a system. The Design process takes all the functional business requirements
In an interview between the senior management of Happy Joe Banking Corporation and the J2EE application architect Scott Khosla, the following points were discussed:I. The system needed to respond within 5 secondsII. The system is needed to have a 99.9% uptimeIII. HJBC
Choice D is correct. The non-functional service level requirements discussed are Performance (system needs to respond within 5 seconds), Availability (system is needed to have a 99.9% uptime),
Moon Microsystems has a web-based solution that was originally built using Servlets. However, in recent months, the IS manager has asked developers to use JSP technology with Java Scriptlets embedded in HTML code. Scott Khosla, the architect, however is insisting that the code be modularized and that EJBs be used instead of Servlets and JSP for business logic processing. In asking developers to modularize existing code, what software development technique is Scott asking the developers to
Choice D is correct. Software applications have a tendency to grow in complexity over time. When that happens, they become difficult to extend, maintain and modify. They also become hard to
Fragile Oars, a manufacturer of boating supplies has a mainframe based legacy application for customer and order management. Recently, Fragile Oars embarked on a project to add Internet presence to its products and services and hence created a company website. Since then, its management has realized the importance of having an eFront and wants to start conducting business over the Internet. Fragile Oars wants to use Applets as the front-end. What is the best method to connect to this legacy
Choice D is correct. The best approach in this case is to have the applets talk to Servlets that can act as mediators between the applets and the Legacy system. Hence choice D is correct.Applets
An application has three Stateless Session Beans - SB1, SB2 and SB3. The stubs that implement the respective Home Interfaces are SH1, SH2 and SH3. A client application performs a JNDI lookup to obtain a reference to one of these Home Objects. This is then narrowed and used to create the remote reference to the corresponding remote object. What design pattern best explains the creation of the Remote Object, in this case? A
Choice C is correct.
Compact Computers is a small computer assembly company. Their online application allows customers to pick and choose accessories to build their own PCs. The accessories are: i. Processor - 800Mhz, 1Ghz, 1.2Ghzii. HDD - 40 GB, 60 GB, 80 GBiii. Memory - 128 MB, 256 MB, 512 MB If a computer can have exactly 1 processor, 1 HDD and 1 memory stick, what pattern would be best used here? A
Choice B is correct. Builder (GOF 97) separates the construction of a complex object from its representation so that the same construction process can create different representations. Here
