21⟩ Write a singleton program?
Having single instance through out the application.eg.: Loggers
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24 Advanced Java Questions And Answers
22⟩ Explain what is orm?
Object Relational Mapping ,its a tool for transaction management that needs to be integrated with Spring,Struts etc.Eg : Hibernate,iBatis,JDO etc
23⟩ What is prototype?
Having multiple instances or having clones
24⟩ In spring bean class uses singleton or prototype?
By Default spring uses singleton or mention singleton="true" for singleton else false for prototype inside bean tag.
