How can we design/implement singleton object?
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Answer / ravi
Make the constructor private
provide a static synchronized method to get the Instance.
this should make the object singleton for that jvm instance
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Answer / jayashri
by declaring the constructor as private and we have to create public static method which returns the address of single object.
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Why is it important to use systems analysis and design methodologies when building a system? Why not just build the system in whatever way appears to be “quick and easy”? What value is provided by using an “engineering” approach?
1 Answers DBU, KSV College, Sampson, University of Ibadan,
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2. Create your own definition of a system. Based on the “system” definitions a. Identify your viewpoint of shortcomings in the definitions. b. Provide rationale as to why you believe that your definition overcomes those shortcomings. c. From an historical perspective, identify three precedented systems that were replaced by unprecedented systems.
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Design Patterns 
