How should i/o be actually used

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Reference no: EM131090242

Syntactically, I/O ports are public global. In order to separate mechanisms from policies (i.e., improve the quality of the software system), how should I/O be actually used?

a) Local in allocation

d) Private in scope

c) Public in scope

b) Global in allocation

e) Volatile

f) Nonvolatile

Reference no: EM131090242

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