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Q3. Exercises: i. When describing a system, explain why you may have to start the design of the system architecture before the requirements specification is complete. ii. Assume that the Mentcare system is being developed using an object-oriented approach. Draw a use case diagram showing at least six possible use cases for this system. a. (Only a UML is required for this question)

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Running Head: CLUSTER SERVERS AND VIRTUAL TAPE LIBRARYQ2. Exercise:1. Research server clustering technology used in a data center.2. Describe the benefits of using a virtual tape library over a physical tape library.Requirement: One and Half PageCluster Servers and Virtual Tape LibraryNameInstructorInstitutional AffiliationDate1CLUSTER SERVERS AND VIRTUAL TAPE LIBRARY2A cluster is a connection that comprises of two or more computers connected together with anaim of providing a higher level of scalability, accessibility and dependability that cannot beachieved by using a single machine. In the current data center setting, clusters of servers areutilized for a wide range of purposes which include load balancing, high availability andenhanced computational power.All clusters are charged with the duty of combining multiple computers to appear as a singleunified high performance system making use of special software and high speed networkinterconnects. Server clusters have traditionally been linked to institution research, scientific testcenters, and military exploration for distinctive applications, such as; Meteorology, whichbasically is concerned with wea

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