SWE 2410 Exam 1 Prep

Closed-book, closed-note, and using Canvas.

Review

Bring your textbook to the review!

These are sample questions; some may be on the exam, but the exam question is likely to be worded differently and there will be questions on other material as well. Use these to make sure you are familiar with each of the topics, to get practice thinking about the sorts of questions you will see, and to make sure you know the technical terminology.

General approach:

• know material, terminology; be ready to apply it
• ensure you are telling me all that's relevant
• be cautious of using the terms in the question in your answer (especially for definitions!)
• think in terms of answering in sentences
• If a question asks for a reason, you might ask your self "why?" a couple times to make sure you really do give a reason or otherwise go beyond what's written in the question itself.

Topics

The exam will cover all of the material since the beginning of the term. Ask if you are not quite sure what material that includes! Some key things to know:

• Rational for studying design patterns and how they are communicated.
• How to apply the noun identification method to construct domain class diagrams.
• The RIBS criteria for classes: you should be able to identify each in good domain classes.
• Coupling
• UML notation, especially for class diagrams; practice drawing the notation!
• Design patterns, including
  • names, indicators, advantages of using, disadvantages
  • constructing class and sequence diagrams showing the application of a design pattern to a problem
  • writing code illustrating applying the pattern
  Don't try to memorize diagrams and code; you will remember just pieces of it and fail to apply key concepts. Understand how the pattern works and you can apply it in new domains.
• When to use an abstract class and when to use an interface (in Java).
• General design principles such as don't repeat yourself.
• Other technical terms discussed in lecture and the textbook(s).

This is not a comprehensive list. But these items tend to show up on quizzes and exams, so provide a solid starting point. Do read the textbook: it gives important context that helps you remember key concepts and explanations.

Review Questions

1. What are advantages of object-oriented designs over non-OO designs (that is, procedural designs: collections of steps)?
2. What would you tell a student in Data Structures to encourage them to prioritize domain classes in their designs?
3. Give three or more examples of classes that would appear in a solution space but not a problem space.
4. What are the goals of the noun (and verb) identification method for systems design?
5. Name 3 things that fail to have identity.
6. Consider a registration system: what would be good responsibilities for
   • Class, Section, Schedule, Room, Student, Instructor, Professor
   • Draw a class diagram showing the relationships between these (and any other obvious classes).
   • How would advisors be handled in this system?
7. Suppose a design includes a class called Main that captures the main in a program along with other stuff. Explain how this class violates the RIBS criteria in multiple ways.
8. Explain how a high-level class diagram (covering just domain classes) is useful in system design.
9. How would you describe the design pattern for a classroom? What would be the features? What would be reasons to not apply this pattern?
10. Explain how the Null Object pattern shows up in JavaFX and draw a class diagram illustrating it. Discuss any negative consequences for using the Null Object pattern, applying those negatives to JavaFX programming.
11. The Adapter pattern was initially described as allowing a team to replace one library by another. Give two other reasons to use the pattern.