What is the difference between a persistent class and a transient class? Provide at least one example of each class type.
Answer to relevant QuestionsWhat is an object identifier? Why are object identifiers required in an object database?Does an object database require key fields or attributes? Why or why not?The Universal Product Code (UPC) is a bar-coded number that uniquely identifies many products sold in the United States. For example, all copies of this textbook sold in the United States have the same UPC bar code on the ...Visit the Web site of an online catalog vendor similar to RMO (such as www.llbean.com) or an online vendor of computers and related merchandise (such as www.cdw.com). Browse the online catalog and note the various types of ...What two key principles are proposed by Norman to ensure good interaction between a person and a computer?
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