Explain in detail the design concepts.

Abstraction

• Functional abstraction
• Data abstraction
• Control abstraction

Information hiding

• Every module in the system hides the internal details of its processing activities and modules communicate only by over defined interfaces.

Structure

• It permits the decomposition of a large system into smaller, more manageable units with well explained relationships to the other units in a system.
• Network is the most general form of structure.

Hierarchical Structures/Structure Charts

• It depicts the structure of subroutines in a system, the data passed among routines, can be indicated on the arcs connecting routines.

Modularity

• Modular system consists of well-defined, manageable units with well defined interfaces between units.

Concurrency

• Independent processes that can be activated concurrently if multiple processors are available.