” 写作COMP291201编程、 辅导Python，c++程序MODEL ANSWERS AND MARKING SCHEME COMP291201Page 1 of 3 TURN OVERThis question paper consistsof 3 printed pages eachof which is identified by the CodeNumber (COMP291201)This is an open book examination.Any written or printed material is permitted. UNIVERSITY OF LEEDSSchool of ComputingJanuary, 2019COMP291201Software Engineering PrinciplesAnswer all three questionsTime allowed: 2 hoursMODEL ANSWERS AND MARKING SCHEME COMP291201Page 2 of 3 TURN OVERQuestion 1(a) A computer programmer complains that she has not done lots of programming in hersoftware Engineering course. Identify three software engineering principles sheshould have learnt that will make her a better programmer. [3 marks](b) An enthusiast for XP (Extreme Programming) has offered to do pair programmingwith you for your next software development project. He says he is very experienced.Give two reasons why you might accept or decline his offer. [2 marks](c) You have been asked to review a 900 page requirements specification written fouryears ago by a programmer who has now left the company. What advice can yougive immediately without looking at the specification? [3 marks](d) In the Agile Manifesto, why is customer collaboration considered more importantthan contract negotiation? [2 marks](e) Briefly explain why the process of project planning is iterative and why a plan mustbe continually reviewed during a software project. [3 marks](f) Give an example of an ethical issue that is particularly important for medical andhealth software. What additional tasks would you recommend for a projectdeveloping a medical or health software product? [2 marks](g) Give an example to illustrate your understanding of the difference between softwarecode reuse and software refactoring. [2 marks](h) Imagine a situation where two developers are simultaneously modifying threedifferent software components. What difficulties might arise when they try to mergethe changes they have made? [3 marks][question 1 total: 20 marks]Question 2(a) Draw a use case diagram (with between five and nine use cases) for a softwaredevelopment tool that you are familiar with. [5 marks](b) A senior government official is shocked to learn that many software engineeringprojects fail. She has just agreed to fund a very large 10 year software engineeringproject. What actions could she take now to reduce the chance of failure? [5 marks](c) You have been asked to investigate the requirements for a system that is expected tomake half of the Client companys staff redundant. Bearing in mind the sensitivities ofthis project explain how you would approach a two week initial investigation. Youmay choose to use the SQIRO headings (Sample Documents, Questionnaires,Interviews, Reading and Observation) to structure your answer. [5 marks]MODEL ANSWERS AND MARKING SCHEME COMP291201Page 3 of 3 TURN OVER(d) A group of students are about to start a group software engineering project. Theyhave decided to appoint the most talkative student as Scrum Master and the lazieststudent as product owner. They have decided to use a Kanban (Scrum Board) listbased on requirements they brainstormed the first time they met each other and havedecided to do the whole development in one sprint. Identify five things that could gowrong and for each of these, advise the students on a better approach. [5 marks][question 2 total: 20 marks]Question 3Scenario: A University plans to install an automated attendance monitoring system which willuse simple, battery powered Bluetooth devices installed in each lecture room that broadcasta unique number. Students will be told to download an App on their smartphones that, whenthey press Confirm Attendance, will read the unique number and use the centraltimetabling system to check that the student is in the right room at the right time. If they are itwill update the central attendance system to confirm their attendance.a) Draw a UML implementation diagram (deployment and component) described in theabove scenario. You can assume that the central timetabling and attendancesystems are on separate university servers that can be accessed via WiFi. [5 marks]b) The most common use case for this system will be Confirm Attendance performed byan actor called Student.(i) Write a user story for this use case describing the simplest path to asuccessful outcome. [2 marks](ii) Draw the Use case realisation as a UML sequence diagram (using thecomponents from your Answer to part a) to show the sequence of messagesfor the same successful outcome. [3 marks]c) The system designers have now proposed an alternative candidate design option forchecking the central timetabling system. Their initial plan was for the App to checkthe central timetabling system in real time (i.e. when the student presses theConfirm Attendance button). The designers have proposed an alternative designwhich would be to download the details of the students timetable when they firstdownload the App and hold this data locally on the students smartphone. Both ofthese candidate Solutions have design issues. Briefly summarise the design issuespresented by the two options and suggest a compromise solution. [5 marks]d) You have been asked to lead a group of students to test a working prototype of thesystem. Describe a set of five tests that you might conduct to test the systemsreliability, dependability, Usability, scalability and security respectively. [5 marks][question 3 total: 20 marks]如有需要，请加QQ：99515681 或WX：codehelp
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