Patterns, or design patterns
a. Distill programmer experience into models that work
b. Should be taken as a detailed prescription for problem solving.
c. Have become standard and useful tools
d. Have no formalism for expression and implementation of patterns.
e. UML is a formalism to express patterns
All parts except b) and d) are correct.
Explanation: Part a) may be deduced from the text, but is not explicitly stated there. Part b) is explicitly contradicted by the text. “One should not follow all the fine details of a patterns.”. Optimizations are certainly permitted, and are illustrated in the discussion in the text. Part d) is wrong, there are several formalisms, including UML.
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