Question: What are the differences between the logical and physical ERDS
What are the differences between the logical and physical ERDS?
Answer to relevant QuestionsDescribe the metadata associated with the physical ERD.Describe three situations that can be good candidates for denormalization.Visit a commercial Web site (e.g., CDnow, Amazon. com). If files were being used to store the data supporting the application, what types of files would be needed? What data would they contain? Pretend that you are a project manager for a bank developing software for automated teller machines (ATMs). Develop a unit test plan for the user interface component of the ATM.Discuss why testing is so essential to the development of the new system.
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