Dharmsinh Desai University 2007 M.C.A Computer Aplications System Design
Uni : Dharmsinh Desai University
Faculty : MCA
Sem : 3
Sub : System Design & Engineering 35- 2
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DHARMSINH DESAI UNIVERSITY, NADIAD MCA Department, Faculty of Technology
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SEMESTER-in Examination Sub: System Design Engineering Max marks: 60 _ * Hours: 3 , |
Exam Seat No: Date: GliiL/Z&o'l Day: Time: fca 1 |
Instructions:
1* Answer each SECTION in separate answer book* t, 2. Figures in the right indicate maximum marks for the question.
3. Write down the options only not the answer where options are given
4. While answering match the following questions9 answer as shown e.g. (a) - (i), (b) - (ii) etc,
5. The length of the answers depends upon the marks for that question
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SECTION -1
1 Answer the following A The following questions are of multiple choice. Select the most appropriate one and justify your
10
answer: (4><2 = 8)
(i) Which of the following is the most important principle of input design?
(a) capture input electronically as close to the source as possible (b) minimize keystrokes never use on-line processing (d) use on-line processing when appropriate
(ii) Black-box testing attempts to find errors in which of the following categories (a) incorrect or missing functions (b) interface errors performance errors (d) all of the above (e) none of the above
(iii) Which of the following is not a typical project milestone?
(a) Completion of design (b) Production of a prototype Time for project member vacations
(d) Completed testing of the prototype (e) Approval of a pilot run
(iv) During implementation, the project team:
(a) concentrates on the business aspects of the system and tends to be oriented to a high level of specificity
(b) studies the organization's current procedures and the information systems used to perform organizational tasks
(c) determines the scope of the proposed systems and produces a specific plan for the proposed project
(d) codes, tests, and installs the new system
B The following questions are true or false. Marks will be given for justification (2x1=2)
(i) The focus of validation testing is to uncover places that a user will be able to observe failure of the
* i
software to conform to its requirements
(ii) The goal of the output mechanism is to simply and easily capture accurate information for the system,
typically by using on-line or batch processing, capturing data
2 Answer the following 10
A Name three types of faults that might be found by an inspection check and give an example to
illustrate each (3)
B Explain the differences between verification and validation. Do you agree with some purists that formal verification should completely replace dynamic techniques in the verification and validation process? Justify your answer (2)
C What controls re needed on data transfer during conversion? Explain them in brief (2)
D Discuss the difference between black-box and white-box testing. Can we use them together in
the defect testing process? Justify your answer.
OR
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2 Answer the following
A Explain why program inspections are an effective technique for discovering errors in a program. (2)
B What is systems conversion? What methods are used for systems conversion? Briefly explain each. (4) C It is a testing whose basic technique is to repeat entire testing process after every change, however small Name and explain it (2)
D What are the differences between statistical testing and defect testing? (2)
3 Answer the following 10
A What is system reliability? Discuss the approaches to system reliability pointing out the advantages and disadvantages of each. (3)
B What is the difference between Alpha and Beta testing? Explain why these forms of testing are
particularly valuable C Describe in brief N-version programming approach D Compare and contrast equivalence partitioning and boundary value analysis of defect testing (2)
OR
3 Answer the following
A Describe briefly the four aspects of fault tolerance and also describe the two comparable approaches.
From which model they were derived? (4)
B What is the difference between a test stub and a test driver?
C Are SW faults and SW failures same? Justify your answer
D Reliability in a software system can be achieved using three complementary strategies. Name and explain them.
(3)
10
(2)
(1)
(3)
ZJO Z
answer:
4 Anwer the following 10
A The following questions are of multiple choice. Select the most appropriate one and justify your
(4X2 = 8)
(i) Which of the following can be elements of computer-based systems?
(a) documentation (b) software people (d) hardware
(e) (b), (c) & (d) (f) all of the above
(ii) Which of the following fact-finding techniques is preferred when the validity of data collected through other methods is in question, or when the complexity of certain aspects of the system prevents a clear explanation by the knowledge workers?
(a) sampling (b) observation (c) questionnaires (d) interviews (e) research and site visits
(iii) Which design model is analogous to a set of detailed drawings for each room in a house?
(a) Architectural design (b)Component-leveldesign Datadesign (d) Database design
(iv) The spiral model of software development
(a) ends with the delivery of the software product
(b) is more chaotic than the incremental model
(c) includes project risks evaluation during each iteration
(d) All of the above
B The following questions are filling up the blanks, choose the most appropriate word(s) (2X1 = 2)
(i) _____ questions require a response to express a viewpoint, but_questions require a direct
answer from the interviewee, and_is a question that follows to verify the answer of an earlier
one
(ii) _refers to the strength of the relationship between modules and_refers to the number
fcr of sub-ordinate modules controlled by a calling module.
5 Answer the following 10
A What do you think happens when requirements validation uncovers an error? Who is involved in
correcting the error? (2)
B What is the importance of prelim inary investigation? What are the main activities in preliminary
C Consider the traditional Waterfall model of system development and Prototyping, your task is to provide a analytical review of the two (include the advantages and disadvantages also). Can you identify the ideal situations for the two methodologies to be applied? (3)
D Explain the difference between# structured and an unstructured interview. When is each type of
interview appropriately used? (3)
OR
5 Answer the following 10
A What are software requirements? What are the concept of user requirements and system requirements? Why these requirements are explained using various notations and not by natural English? Are there any differences between functional and non-functional requirements? (5)
B If a prototype is developed and utilized, and the decision is later made to abandon the application altogether, was the investment in the prototype a waste of time and resources? Explain the reason for your answer. (3)
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C Mr. Shah is a newly hired systems analyst with ABC Company with your group where you are chief systems analyst. Mr. Shah has always felt that questionnaires are a waste. Now that you will be doing a systems project for Jaipur Golden Transport Company, a national transport firm with branches and employees in morthan 100 cities and towns in India, you want to use a questionnaire to elicit some options about the current and proposed systems.
(i) Based on what you know about Mr. Shah and Jaipur Golden Transport Company, give four
persuasive reasons why he should use a questionnaire for this study. (2)
6 Answer the following 10
A What is a black hole? What is a miracle? Explain them with illustration (3)
B What are the three construct used in structured programming. Briefly explain each of them (3)
C Are there any differences between the designs of input for online and batch processing systems? (2) D What is output? What are the objectives in designing outputs layout? (2)
OR
6 Answer the following 10
A What is the relation of data items and structures io a data flows, processes, and data stores? Explain thm with diagrams (3)
B What is structured chart? What are its purposes? Is there any relation between data flow diagrams and structured charts? Justify your answer (3)
C What are coding methods? What purpose do they serve? Discuss the different types? (4)
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| Earning: Approval pending. |
