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Author Question: Define the differences between abstract and concrete classes. What will be an ideal ... (Read 49 times)

cabate

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on: Jul 7, 2018
Define the differences between abstract and concrete classes.
 
  What will be an ideal response?

Question 2

________ specifies how the behavior of the system must be tailored to the level of its users' expertise.
 
  A) Reliability
  B) Testability
  C) Usability
  D) Maintainability


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tennis14576

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Reply #1 on: Jul 7, 2018
Answer to Question 1

In the hierarchy of superclasses and subclasses, some classes can be instantiated into actual (real or virtual) objects, while others cannot. Those that can be instantiated are called concrete classes; those that cannot be are abstract classes.

Answer to Question 2

C


cabate

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Reply 2 on: Jul 7, 2018
Excellent

miss.ashley

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Reply 3 on: Yesterday
Gracias!

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