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The concept of modularity leads every software designer to a fundamental question: “How can we?” Break down a software solution to get the best set of modules?”
ISL201 HIGHLIGHTED HANDOUTS
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The principle of information hiding suggests that modules are defined by design decisions. which (each) is hidden from the others.” In other words, the modules must be specified and designed in such a way that the information (procedure and data) in one module is not accessible to other modules that do not need such information.
ISL201-ISLAMIC STUDIES
Concealment means that effective modularity can be achieved By defining a series of independent modules that communicate only with each other: The information necessary to achieve software functionality is abstracted into a procedure definition (or information) entities that make up the software.
Hide defines and enforces access restrictions to procedural details in a module as well as any local data structures used by the module.
ISL201 HIGHLIGHTED HANDOUTS-ISLAMIC STUDIES
Using hidden information as a design criterion for modular systems offers the most advantages When changes are needed during testing and later during software maintenance.
Because most of the data and procedures are hidden in other parts of the software and are subject to accidental errors. It is less likely to spread to other locations within the software while it is being modified.
ISL201 HIGHLIGHTED HANDOUTS PDF-ISLAMIC STUDIES
Hiding information is a software design technique for achieving internal abstraction using: Modularity in which each module’s interface exposes as little as possible to the module Internal workings and other modules prevent the use of information about those modules.
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