Explain how the Logical Organization of Data differs from Physical Organization


Physical Structure:

  • Physical data is stored linearly in the RAM
    • Those linear pieces of data are stored in Bits
  • On a form of Secondary Storage is simply stored in linear form and is encoded in a certain way

Logical Structures

  • In RAM logic is represented in form of data structures
  • There are different form of searching this:
    • Arrayed Structure uses a linear search through the RAM
    • Linked Lists follow a similar pattern of the Physical Structure
    • Binary Trees where the data is stored and linked differently

  • On Secondary Storages files are accessed through an index

To summarise: Physical Storage is always linear and Logical Structures are imposed over this suing some method of organisation.

Created by: Daniel Gillo
Last modification: 15th September 2011

Sources:
  • Jones, Richard. Computer Science Java Enabled. Victoria: IBID Press, 2004