Explain the lifetime of an object. Provide an example. What ...

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Explain the lifetime of an object. Provide an example.
 
  What will be an ideal response?

Question 2

Which of the following is not true about managing data in today's large organizations?
 
  A) Application software is separate from the database software.
  B) Data is captured more than once to ensure accuracy.
  C) Data exists in databases for operational and managerial purposes.
  D) The need to manage data is continuous.

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Answer to Question 1

The lifetime of an object specifies when its instantiated, how long it exists, and when it is destroyed. We specifically create an object when we need it and free it afterwards when we are done with it, and so we are in complete control of its lifetime. We can show the start and end of an object's lifeline on a sequence diagram. A message to the object's Name indicates its construction. A cross symbol marked on its timeline shows its destruction.

Answer to Question 2

B

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