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1. PRT 25 A 5 JOSM eu u upiss s me na ha as S ahua eq gS Y 7 7 sod sod DN sod 1osino FINAL EXAM Page 9 of 23 UNIVERSITY WATERLOO SE463 FALL 2011 b o d f g h The data in the clipboard should be stored in which order Check the correct answer Logical or time order Visual order What is the main implementation advantage of your answer to Question b If your BDWP had a command that showed the user the contents of the clipboard in which order should the contents of the clipboard be shown to allow the user to read the contents normally Logical or time order Visual order The data in the search pattern should be stored in which order Logical or time order Visual order What is the main implementation advantage of your answer to Question e In which order should the contents of the search pattern be shown as the user enters the search pattern to allow the user to read the contents normally Logical or time order Visual order In view of your answer to Question b of what other class in the original diagram would it be reasonable to consider the class clipboard a subclass In view2. she can turn off the power before a mess is made The microwave oven was placed on a shelf that is above the eye level of 90 of the population One could say that this user interface design error happened because in doing the requirements analysis for the lounge the analysts forgot to consider some important for the microwave oven in the lounge RE Reference Model d The simplest way to ensure that a state machine diagram of a system remains a pure specification and does not go into implementation details is to insist that all entities of the state machine diagram are entities of the in the world diagram Real Life RE e The main points of Michael Jackson s famous quotation RE is where the informal meets the formal is that the conversion from raw ideas about a system to be built to code cannot be if indeed Page 2 of 23 FINAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 the code is produced and the point in the system s development lifecycle that the conversion happens is called f The main point of requirements determination is unstoppable is that if RE is not allowed to run its course to produce a requirements specification that specifies the system to be built completely then requirements will be determined during the writings of 1 by the and 2 the by the and neither of these people share the customer s interests Testing and Inspection g Each of the various tes
3. Answer A W Answer FINAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 xii AW B v Answer gt AWB Answer xiv OSA gt OA Answer xv SOA OSA Answer Page 23 of 23 FINAL EXAM
4. Class Diagram and World Diagram Recall the domain model of the bidirectional word processor BDWP in the form of a UML class diagram with a superimposed world diagram that was presented as Berry s solution to Deliverable 2 that is reproduced on the next page a Add to this domain model classes for i a Clipboard which is used to store text which is copied from a selection such as obtained in your use case a selection that might cross a directional change boundary ii a search pattern which is entered by the user in an input box after he or she invokes the find command through the edit menu or with a shortcut Put these new classes in the proper place in the diagram so that they are where they should be in the super imposed world diagram Then draw arcs connecting these new classes to the other classes to which they have access or that have access to them Page 8 of 23 FINAL EXAM SE463 FALL 2011 UNIVERSITY WATERLOO Od peogy gt __ 5 Ienn N Tu H1 55 2 0 80 WO dd VS uonisod Fs
5. R if one cannot demonstrate R for the SUD from D 5 one try weakening R Answer j In the validation condition D 5 if one cannot demonstrate for the SUD from D and 5 one can try weakening S Answer Page 5 of 23 FINAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 k 0 m 0 Page 6 of 23 In the validation condition D 5 R if one cannot demonstrate R for the SUD from D and 5 try strengthening D Answer The validation condition D 5 R is known also as the verification condition Answer In the world diagram something is in the interface if it is needed to write 5 Answer In the world diagram something is in the system excluding the interface if the user needs to be aware of it to operate the system Answer In the world diagram something is in the system if the implementers want to implement it Answer In the world diagram something is in the system excluding the interface if the user does not need to know it Answer In the world diagram something is in the system excluding the interface if the user should not be allowed to know it Answer In the world diagram something is in the interface if it is relevant to the system but the developers do not want to be responsible for building it Answer In the world diagram something is in the world excluding the environment and the syste
6. that secret users may only write secret data 10 said that he thought that secret users may write only secret data Below are 14 sentences 10 of which interpret explain or exemplify the meanings of the above 10 sen tences Please in the underscore next to each sentence S above write the letter labeling the one of the 14 sentences below that best interprets explains or exemplifies 5 A The only thing secret users may do with Secret data is to write them they may not for example read them B They are permitted to write but perhaps they are unable to C But he wasn t really sure D But not Secret daemon processes or administrators E No one else said so Only did But they may not read such data G They may not write secret procedures H didn t really mean it just said it I don t think anyone else thought so J But they may not write Top Secret or Unclassified data K didn t say anything else L The writer must be a user and a Secret user at that to write Secret data M He thought only that and did not think anything else N But not Unclassified or Top Secret users Page 17 of 23 FINAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 b The Plural Ambiguity The following three sentences appear in at least one document about object oriented programming 1 Classes have names 2 Classes have component classes 3 Classes have subclasses The ambiguity in these sent
7. FALL 2011 c Consider the following sentence LO1 in logical order with the convention that lower case letters are strong L R characters upper case letters are strong R L characters and the punctuation symbols are themselves he said car MEANS CAR Then show the correct visual order representation of LOL d wm Consider the following sentence LO2 in logical order with the convention that lower case letters are strong L R characters upper case letters are strong R L characters and the punctuation symbols other than and are themselves he said car MEANS CAR Suppose that is RLE and is PDF Then show the correct visual order representation of LO2 e Consider the following sentence LO3 in logical order with the convention that lower case letters are strong L R characters upper case letters are strong R L characters and the punctuation symbols other than and are themselves he said car MEANS CAR Suppose that in this case is RLO and is PDF Then show the correct visual order representation of LO3 f When a bidirectional word processor is processing a logically ordered file in principle the unicode bidirec tional algorithm is carried out on the entire logically ordered file after each to the file However an implementation of the bidirectional word processor may make any optimizations that has the observable to the user Page 20 of 23 FI
8. NAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 7 10 total marks Linear Temporal Logic a Match each numbered formula with the lettered English sentence that most closely captures the formula s meaning 1 A 2 O A OB 3 OSA 4 04 5 AS 6 O A OB A Henceforth A B Whenever A then B in the next state C Whenever A then eventually B D A in the next state E Eventually A is permanently true F If A then B in the next state G If A then eventually B H If eventually A then henceforth B I A happens infinitely often J A and B happen infinitely often b Answer True or False Each incorrect answer is worth the negative of one half the marks that a correct answer is worth i e it s not worth guessing Nevertheless you cannot get less than zero in total i O A gt OB O A gt Answer O A OB O A OB Answer Page 21 of 23 FINAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 HI V1 Vii Vill Xi Page 22 of 23 AU OB Answer iv AU gt OB Answer OB AU B Answer OB AU B Answer OB AW Answer Answer ix AW B gt DB Answer lt AW
9. UNIVERSITY WATERLOO SE463 FALL 2011 SE463 Fall2011 Final exam 17 December 2011 12 30 3 00 Instructor Daniel M Berry No aids allowed 1 closed book Plan your time wisely Answer all of the questions on this exam paper Your Name In the immortal words of the yet to be born Jean Luc Picard Make it so QI 15 Q2 10 10 Q4 720 Q5 15 Q6 20 Q7 10 TOTAL 100 Page 1 of 23 FINAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 1 15 total marks Short Answer Mostly Fill in the Blanks A short underscore of 1 inch 2 54 cm should be filled with one word long underscore of 3 inches 7 63 cm should be filled with a phrase consisting of one to several words In the former case if you cannot think of exactly the right number of words then give the best answer that you can and we ll give it as many points as we can possibly even full credit Nonfunctional Requirements a For most software the requirement of may be non functional but for real time software this requirement may be b Perhaps paradoxically the nonfunctional requirement of simplicity may be in direct conflict with the non functional requirement of but for different issues RE Methodology The CS lounge microwave oven 1 too high to allow someone to see if any liquid he or she is nuking is about to over so that he
10. ences is that without domain knowledge up front the reader does not know how many of the direct object entities 1 names component classes and subclasses each subject entity 1 class can have By filling in the blanks below rewrite each of the three sentences into a sentence beginning with Each that expresses the relationship given with the repetition of the sentence below Classes have names 1 1 Each has name Classes have component classes 1 many Each has component classes Classes have subclasses many many because of multiple inheritance Each of classes shares subclasses Page 18 of 23 FINAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 6 20 total marks The Unicode Bidirectional Algorithm a Consider the following sentence and LR document VO shown in visual order Dan said Dw to Dana Write here the number of the line among the five lines below that is the logically or time ordered version of VO 1 Dan said Jl to Dana 2 Dan said 210 to Dana 3 Dan said tL to Dana 4 Dan said 0120 als to Dana 5 dias ot b Write here the number of the pair of lines among the two pairs below that is proper breaking of VO into two lines Page 19 of 23 1 Dan said nbw to Dana 2 Dan said 0120 to Dana FINAL EXAM UNIVERSITY WATERLOO SE463
11. ional punctuation etc one for each text k The space international punctuation etc are strength characters in the Unicode stan dard 1 The main difference between Berry s approach and Unicode s approach to bidirectional word processing is that Berry insists that the user be aware of the of each character but Unicode insists that the user should not have to be aware of this information for strength characters Each of Berry and the Unicode Committee believe that his or its approach is for the user than the other s m If a selection is supposed to select characters that are adjacent to each other in the logically ordered file that is being edited in a bidirectional word processor then when a selection applied to the visual ordering of a file crosses a direction change boundary the region highlighted by the selection appears to be n A selection applied to the visual ordering of a file crossing a direction change boundary causes cognitive dissonance because while the hand continues to move in the direction it was moving as the selection crossed the boundary the region highlighted by the selection grows in the In the Unicode standard Arabic letters are stored in the file being edited in logical order pick one of the following by checking its underscore in position shaped connected and ligatured form OR in stand alone unconnected and unligatured form p Handling traditional Chine
12. m if it is believed neither to be affected by nor to affect the system Answer In the world diagram something is not in the interface if the user has no access to it whatsoever Answer The problem called PotLoBoaDtiP is that a necessary document in software development that is painful to produce is that the document has no benefit to its consumer because the consumer is someone other than the producer Answer FINAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 v A collection of boxes that do not fill up a 53 foot standard shipping container will be loaded into the con tainer by twice the number of people in approximately half the time Answer w An ice arena will be cleared by twice the number of Zambonis each of which works in its own half of the arena in approximately the same time Answer x An ice arena will be cleared by twice the number of Zambonis each of which works in the whole arena in approximately half the time Answer manual will be written by twice the number of people in approximately twice the time Answer z A scenario may contain many use cases Answer aa A use case may contain many scenarios Answer ab During the first phase of a classical brainstorming session it is customary to emphasize quality over quan tity of ideas Answer Page 7 of 23 FINAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 3 10 total marks Domain modeling with
13. n one or more of the transitions to make sure that in fact only one transition can be triggered by any input If you have to change the annotation on any existing transition cross off the old one and write the new one near it Page 13 of 23 FINAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 InWordWithF letter c SOW c pc lt c BetweenWords InWord delim c c E OW pc lt c nbsp c lt VAR c char nbsp c lt VAR pc char delim c c lt letter c c pc lt c Page 14 of 23 FINAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 There is another approach to modifying SMD1 to deal with the fi ligature The number of states is unchanged Instead the event and processing associated with some transitions are changed so that when the current charac and the previous character pc 1 f the f is removed from the output and an fi is output instead Modify the state machine diagram on the next page accordingly Make sure that you deal with every transition that should be dealt with If you have to change the annotation on any existing transition cross off the old one and write the new one near it 66599 1 ter c is of an i letter c SOW c pc lt c BetweenWords InWord delim c c E OW pc lt c nbsp c lt nbsp c lt VAR c char VAR pc char delim c c lt let
14. of your answer to Question e of what other class in the original diagram would it be reasonable to consider the class search pattern a subclass Page 10 of 23 FINAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 Page 11 of 23 FINAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 4 20 total marks State machine modeling with State Machine Diagrams A word 15 a sequence of letters or non breaking space characters ended by delimiter 1 e a space punctuation digit etc For the purposes of this question a letter is any character z that triggers the event letter c while giving z to c a delimiter is any character x that triggers the event delim while giving z to and anon breaking space character is any character z that triggers the event nbsp c but not delim c while giving z to c In the output a non breaking space character looks like the ordinary space that 15 a delimiter but it can be inside a word without ending the word non breaking space character cannot be at the beginning of a word Consider the state machine diagram SMD1 below that outputs its input and that adds an SOW marker before the first character in each word and an EOW marker after the last character in each word In this diagram c holds the current character pc holds the previous character which is already sitting in the output and can be changed and pc c means that the current character becomes the previous for the ne
15. se Japanese Korean requires being able to display text with characters flowing top to bottom TB with lines flowing right to left To make the Unicode standard tridirectional in the way that it is now bidirectional what control characters must probably be added Page 4 of 23 FINAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 2 10 total marks Answer True or False Each incorrect answer is worth the negative of one half the marks that a correct answer is worth i e it s not worth guessing Nevertheless you cannot get less than zero in total In the following SUD means system under development a In the Unicode Standard international punctuation characters are weak characters Answer b In the Unicode Standard international numeral characters are weak characters Answer c In the Unicode Standard letters of an alphabet are strong characters Answer d In the Unicode Standard all standard size space characters are weak characters Answer e In the Unicode Standard there is one standard size space character ignoring the non breaking space char acter Answer In the validation condition D 5 for a SUD D stands for domain assumptions Answer g In the validation condition D 5 fora SUD 5 stands for the SUD Answer h In the validation condition D 5 fora SUD stands for requirements for the SUD Answer 1 In the validation condition D 5
16. ter c c pc lt c Page 15 of 23 FINAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 5 15 total marks Ambiguity a The Only Ambiguity Consider Peter Neumann s famous example of a sentence with at least 21 different variations obtained by migrating only to all possible places in the sentence varying the punctuation adding the word that and changing emphases when speaking said he thought secret users may write secret data Let s first add that to the two places where they should be to get said that he thought that secret users may write secret data A secret user is a user who has a Secret level security clearance i e is allowed to work with secret data 1 data that are classified as Secret Some of the variations are on the next page Page 16 of 23 FINAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 1 Only said that he thought that secret users may write secret data 2 only said that he thought that secret users may write secret data 3 said only that he thought that secret users may write secret data 4 said that only he thought that secret users may write secret data 5 said that he only thought that secret users may write secret data 6 said that he thought only that secret users may write secret data 7 said that he thought that only secret users may write secret data 8 said that he thought that secret users only may write secret data 9 said that he thought
17. ting and inspection techniques described in the lecture on the topic of Inspection are usable not only for validation but also for X hereafter Two distinctions between an inspection for validation and an inspection for X are that 1 The artifacts inspected for a validation are from in the system development lifecycle while the artifacts inspected for a X are from in the system development lifecycle 2 The inspection team for a validation usually includes the ______________ Y hereafter of the sys tem under development while the inspection team for a X usually does not include the Y of the system under development Cost Estimation h To use Function Point Counting to estimate the size of a program one must count the number of times each input output and processing operation pick one of the following by checking its underscore appears in the code occurs during runtime i The nice thing about using Function Point Counting to estimate the size of a program during RE is that one can do the counting of input output and processing operations from the kind of document Page 3 of 23 FINAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 Bidirectional Word Processing Unicode and Beyond 0 In Berry s opinion the major complexity of the Unicode Bidirectional Algorithm could have been avoided by having only strength characters and having number each of the space internat
18. xt transition letter c SOW c pc lt c BetweenWords InWord delim c c E OW pc lt c nbsp c lt VAR c char nbsp c lt VAR pc char delim c c lt letter c c lt We would like to add to SMDI the ability to recognize the need for the ligature That is whenever SMD1 66599 sees an 1 immediately following an f SMD1 replaces them with the ligature Two pages hence is the skeleton of an extension of SMD1 that does the ligature replacement This skeleton consists of a copy of SMD1 with the addition of one more state InNWordWithF to be gone to whenever an f has been seen in the input In this new state if the machine s next input is an 1 the machine should delete the 66599 previously issued f now in pc and instead of outputting i and the machine should output fi Page 12 of 23 FINAL EXAM UNIVERSITY WATERLOO SE463 FALL 2011 Add all necessary transitions and their annotations event condition output commands In these annotations you may use anything that appears in SMDI plus f is triggered by f while giving f to c i c is triggered by i while giving i to c pc means to remove the previous character from the output Also if you have two or more transitions out of one state that would be triggered by the same input be sure to use a condition o
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