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There's no automated checking of these: just see if you could answer each question. If not, revisit the reading.
Q1 According to the author, three characteristics of bad design are fragility, rigidity and immobility. What does each of these mean, in the context of software design? How are they related?
Q2 What is the Dependency Inversion Principle?
Q3 Explain the DIP with the aid of a simple example. In what sense have dependencies been inverted? In your example, how does this inversion help (in principle!) to prevent the software becoming fragile, rigid and immobile?
perdita@inf.ed.ac.uk)
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