Software Engineering I - Final Exam 2004 | CS 427, Exams of Software Engineering

Download Software Engineering I - Final Exam 2004 | CS 427 and more Exams Software Engineering in PDF only on Docsity! CS427 Final Exam NetID: University of Illinois at Urbana-Champaign Department of Computer Science Final Exam CS 427 - Software Engineering I Dec 16, 2004 Time Limit: 3 hour Instructions for the Student Print your name and NetID in the space provided below; print your NetID in the upper right hand corner of every page. Name: NetID: This is a closed book, closed notes examination. You may not use calculators or any other electronic devices. Any form of cheating on the examination will result in a zero grade. All work should be noted on the page the question is asked. If the grader cannot understand your handwriting you may get 0 points. This exam has 41 questions, for a total of 110 points. On the left hand side of each question you will find how many points it is worth. The exam has 14 pages including this cover sheet. Page Points Score Grader 2 11 3 9 4 12 5 7 6 9 7 8 8 11 9 9 10 11 11 4 12 12 13 7 Total: 110 CS427 NetID:Final Exam (1) 1. Answer to the following questions by writing true or false below them. (a) In RUP the system architect is responsible for determining what activities are done by each worker at each iteration. (1) (b) In RUP a "worker" can represent a group of individuals. (1) (c) In RUP, an artifact can be the responsibility of multiple workers at different itera- tions. (2) 2. (a) You know that in your company the developers usually take twice as much time as they plan to complete a project. Now you are planning to enter the market with a brand new system. Suppose that the company usually makes its iterations last 2 weeks. Your system has 10 use cases and the developers estimate that it will take them about 6 weeks for a single developer to implement one use case. Given that your project plan has 10 iterations, estimate the number of people you need for this project. (2) (b) Now that you have an estimate, what are two things that might go wrong with your estimate? (2) 3. After the inception phase of a big project in a large software company, a project manager produced a schedule for the rest of the project. The schedule has a very small elaboration phase and a very large construction phase. Describe one situation in which this decision is justified and one case where it is unjustified. Page 2 of 14 CS427 Final Exam N etID: (4) 12. Compare and contrast XP and Crystal Clear processes by providing two similarities and two differences between them: (1) 13. According to "Joel On Software" what is the number one cause of unhappiness when using a new user interface? For questions 14 to 17 pick the guideline below that is most relevant to the example presented. Does the given example obey or break the guideline? Joel Spolsky made these observations about user interfaces: 1. Good metaphors work better than having none 2. Bad metaphors are worst than having none 3. Interfaces should behave exactly how users thought it would 4. Many people are intimidated by computers 5. Users can't remember anything 6. Users don't read all the displayed info 7. Good designers use consistency intelligently 8. Users can't control the mouse very well (2) 14. Some word processors would display under their File menu the last files that were edited. Page 5 of 14 CS427 Final Exam N etID: (2) 15. Up until Mac OS version 8 and 9, Macintosh users who wanted to eject a floppy disk or a CD had to drag them into the trash bin. (2) 16. Your friend learns how to use Windows operating system. When it comes to Shut Down the computer she has to press the Start button. liC.khere. to begin (2) 17. A tax preparation software uses 5 different ways to close a window depending on the type of window that one closes. (3) 18. Your company specializes in sophisticated web applications. What are three reasons to separate the UI from application code? For the questions 19 and 20, you can use these pattern names from Jenifer Tidwell's book: Extras on Demand, Step by Step Instructions, One-Window Drill Down, Intriguing Branches, Multi-level Help, Overview plus Detail, Hub and Spoke, Visual Framework, Center Stage, Ti- tled Sections, Card Stack, Closable Panels, Movable Panels, Right-left Alignment, Diagonal Balance, Property Sheet, Progressive Enabling. Page 6 of 14 CS427 Final Exam N etID: (2) 19. In Mac as x, there are many applications that use drop down lists. The problem with drop downs is that the user can't see what other pages are available until they open the drop down list (in the figure below one can see only Copies & Pages). Supposing that the number of pages to be displayed is less than 5, what pattern might be best fit to eliminate this problem? (2) 20. When you make an online reservation for a rental car at Avis.com you follow through a wizard (step-by-step pattern) that guides you through the reservation process. On the upper left corner of the page there is a progress indicator that shows you how far you are on the registration process. In the image below one has already chosen the Time &- Place and\R:ates & Discounts and is now selecting the type of car. Notice that the finished steps became hyperlinks so one can easily go there to change some information. This progress indicator is an example of what pattern? (1) 21. (a) Why are Use Cases only a part of the requirements but not all? (1) (b) What kind of requirements cannot be captured by Use Cases? (2) 22. Do you think it's important that "Architect also implements" code? Give two reasons. Page 7 of 14 CS427 Final Exam NetID: (2) 32. Give one advantage and one disadvantage of formal specifications. 33. Data Flow Diagram(DFD), Control Flow Diagram(CFD), Sequence Diagram(SD), and Class Diagram(CD) are diagrams used in designing a software system. For each part, list all of the diagrams that are appropriate. You should use above acronyms. (a) Showing Synchronization and Timing(1) (1) (b) Showing Module Dependency (1) (c) Designing Object Oriented systems (2) 34. According to "software facts and fallacies" , when is the best time for estimation during software development and who is most likely to make the most reasonable estimation? (2) 35. Write two tasks that must be done in maintenance other than understanding the problem and implementing the changes to the software system. (2) 36. Open source projects usually don't have very good user interfaces. Explain why. Page 10 of 14 CS427 Final Exam N etID: (1) 37. (a) Three members of the Java Users Group went out for drinks after a meeting and started to talk about how to find good abstractions. Pat said that it was important to think hard, to look for commonalities and to do research to find the common abstractions in an area. Bobbie was on an XP project, and said "We don't spend a lot of time up front doing those things and our system has a lot of neat abstractions in it." Pat said "That is because you... and that is another good way to find abstractions". What did Pat say? (1) (b) Jean told a story about building a bunch of web servers and then said "And on the seventh system, I was taking a shower and it occurred to me that there was a much easier way. I wrote a package to do it that way and we've been doing it that way ever since. I think taking showers is an important part of abstraction." Pat laughed, and said "According to Prof. Johnson, what really happened is ..." What did Pat say? (1) 38. (a) Three members of the Java Users Group went out for drinks after a meeting and started to talk about managing requirements. Pat said that one of the strengths of RUP was how it managed requirements. If a group didn't manage requirements then it would keep changing its target and never finish. Her group had a team of three business analysts that were the only ones allowed to change the requirements document. Bobbie said that requirements were not so big a deal, her very successful XP project didn't have any requirements documents. Pat replied, "but you manage requirements anyway, because you... " (1) (b) Jean said "I use Tomcat, which is a very successful open source project, and it doesn't have any requirements documents, either." Pat said "But that project managed requirements by..." Page 11 of 14 CS427 Final Exam NetID: Consider the system described in the last page. Feel free to tear off the last page when answering the following three questions. (2) 39. (a) Draw the DFD level o. (4) (b) Draw the DFD level 1. Page 12 of 14