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Here is a computer science perspective of bottom-up vs. top-down . explain the "Difference between Bottom-Up...

Here is a computer science perspective of bottom-up vs. top-down . explain the "Difference between Bottom-Up Model and Top-Down Model."

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Answer #1

Top down model

  • In this model we break the problem into small parts and again this small part is broken into parts and so on .
  • It contains rebundant information.
  • It is used in structural / procedural oriented programming languages i. e C
  • Used for documentation, test case creation , code implementation and debugging.
  • It has low interactivity between the modules.
  • It is based on decomposition approach.
  • The top down approach is simple and not data intensive .   

Bottom up model

  • It starts with a smaller parts, where each parts are specified in detail. The parts are linked to form larger components.
  • Rebundancy can be eliminated.
  • It is used in object oriented programming languages like C++, java etc.
  • Used only for testing.
  • It has high interactivity between various modules
  • It is based on composition approach.
  • It is complex and also very data intensive.
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