21. The aim of software engineering is to produce software that is a) Fault-free b) Delivered on time c) Delivered within budget d) Satisfies users' needs e) All of these are the aims of software engineering 22. What benefits does software design patterns provide? a) Novice designers can benefit from learning solution patterns that experts use, with needing design experience b) Expert designers can benefit from studying patterns too: They can broaden their repert of patterns and deepen their understanding of the patterns they already know c) Promoting Communication d) Increasing Development Efficiency e) All of above f a) and b) g) Except c) The feature of the object oriented paradigm which helps code reuse is a) Object b) Class c) Inheritance d) Aggregation. 3. . 4. Which of the following is not an area of concern in the design model? a) Architecture b) Data design c) Interfaces design d) Project scope e) Modular design