Question
a.
BNF descriptions focus on user interactions, while programming languages focus on system behavior.
b.
BNF descriptions focus on the semantics of user interactions, while programming languages focus on syntax.
c.
BNF descriptions use non-terminals and terminals, while programming languages use variables and operators.
d.
BNF descriptions use recursive rules, while programming languages use conditionals and loops.
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Q. How does the BNF description for an interface differ from a programming language?
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