SWE 2410 2nd Exam Prep

Draft!

Review

Topics

The exam will focus on material since exam 1, but may include some of the older material.

Review Questions

  1. Explain how you could (usefully) apply the Adapter pattern to the garden simulator lab.
  2. Name a pattern that improves coupling but not cohesion, and name a pattern that improves cohesion but not coupling.
  3. Some engineers argue for a type of coupling based on inheritance. Identify reasons to list this as a different type of coupling and reasons to not.
  4. Are all uses of Java's reflection features (like setAccessible) content coupling?
  5. Explain how JavaFX implements MVC. Why might its implementation of MVC be inadequate for large projects?
  6. Name 3 forms of excise found in IntelliJ.
  7. Many websites go to the extreme of having very few choices on their landing page while others have an overwhelming number. Why are both forms of excise?
  8. Name 3 types of excise experienced in the everyday life of students (not involving software).
  9. Explain two uses of the Command pattern besides eliminating "do you really mean to do that?" messages.
  10. Draw the command pattern as it might be applied to registering for courses in the coming semester.
  11. Can you write a Java application that uses threads that is guaranteed to never terminate without just falling into an infinite loop?
  12. Do threads require multi-core CPUs? Explain.
  13. If a method is synchronized and two threads execute the method at the same time, which goes first? Why?
  14. Explain what Platform.RunLater does.
  15. How do AWS Lambdas satisfy the "essential characteristics" of cloud computing as identified by NIST?
  16. 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.
  17. The Adapter pattern was initially described as allowing a team to replace one library by another. Give two other reasons to use the pattern.
  18. Why is JSON format often used to transmit data to and from AWS Lambdas?
  19. What are some reasons to not use JSON format to transmit data to and from AWS Lambdas?
  20. Suppose you are developing a new web-based application around AWS Lambdas. It is always bad to introduce too many technologies, so you decide to use Lambdas to implement Step Functions. Explain why this is a bad idea.
  21. Would Pub/Sub be a good cloud pattern to use when an application never needs more than one subscriber? Explain.
  22. When should you use the Singleton Pattern? Why is global access important?