NCC EDUCATION INTERNATIONAL DIPLOMA IN COMPUTER STUDIES SYSTEMS DEVELOPMENT. 5 th June 2005

Size: px

Start display at page:

Download "NCC EDUCATION INTERNATIONAL DIPLOMA IN COMPUTER STUDIES SYSTEMS DEVELOPMENT. 5 th June 2005"

Mavis Russell
6 years ago
Views:

1 NCC EDUCATION INTERNATIONAL DIPLOMA IN COMPUTER STUDIES SYSTEMS DEVELOPMENT 5 th June 2005 SECTION A - 1 Answer all questions from this section. Each question requires ONE response only. SECTION A - 2 Answer all questions from this section. Each question requires MORE THAN ONE response. SECTION B Answer any 3 questions from this section. Time: 2.5 hours Clearly cross out surplus answers. Failure to do this in Section B will result in only the first three answers being marked. Any reference material brought into the examination room must be handed to the invigilator before the start of the examination.

2 SECTION A - 1 ANSWER ALL QUESTIONS FROM THIS SECTION EACH QUESTION REQUIRES ONE RESPONSE ONLY For each question enter ONE capital letter ONLY in your answer booklet. Marks QUESTION 1 1 What is the job title of the person in an organisation who takes responsibility for the delivery of all information services to the business? A) operations manager C) systems support manager B) information systems manager D) network manager QUESTION 2 1 Which of these is the responsibility of a project manager? A) definition of a system C) delivering a system on time B) designing a database for a business D) writing program code QUESTION 3 1 Which of the following is most likely to reduce the development time of a software project? A) hiring more programmers C) make use of objects B) reduce the time spent on documentation D) use multiple programming languages QUESTION 4 1 Bohm and Jacopini showed that only three constructs are necessary to produce every type of program. Which are they? A) initialisation, iteration, selection C) iteration, selection, sequencing B) iteration, initialisation, sequencing D) variable declaration, sequencing, selection QUESTION 5 1 In a lending library, a book is borrowed by many borrowers and an author writes many books. Which of the following entity-relation diagrams shows this? A) C) B) D)

3 Marks QUESTION 6 1 Which of these diagrams correctly shows the relationships between the CPU of a computer and its related components? A) C) B) D) QUESTION 7 1 One method of programming involves writing code using short mnemonics to represent machine actions. This method is known as A) high level C) assembly language B) object oriented D) 4th generation QUESTION 8 1 The original code written by a programmer using an editor is known as A) source code C) compiled code B) object code D) machine code QUESTION 9 1 Apache is a web server application available free of charge. It is an example of A) a proprietary standard C) an open standard B) an industry standard D) a de facto standard QUESTION 10 1 The program listing for a software project is most likely to appear in which item of documentation? A) coding C) logical design B) physical design D) implementation

4 SECTION A 2 ANSWER ALL QUESTIONS FROM THIS SECTION EACH QUESTION REQUIRES MORE THAN ONE RESPONSE Marks QUESTION 11 3 The diagram shows the stages in the life of a computer system. Identify the stages A, B and C. Choose from: i) implementation ii) phase out iii) development iv) maintenance v) preliminary study vi) feasibility study QUESTION 12 3 The following diagram shows an outline of the waterfall model for system development. Identify the stages A, B and C. Choose from: i) business analysis ii) strategic study iii) system design iv) logical design v) code and test vi) maintenance

5 Marks QUESTION 13 3 Which THREE of the following are reasons why Java is a suitable language for programming in a web based environment? A) it is platform independent B) it is a fourth generation language C) it does not need a compile stage D) it is object-oriented E) it has built-in security F) it is compiled to machine code QUESTION 14 3 The following entity life history diagram shows the stages involved in the life of a book in a library. Identify the stages indicated by the boxes A, B and C. Choose from: i) Buy ii) Sell iii) Sell o iv) Buy o v) Loan vi) Loan * QUESTION 15 3 Which THREE of the following statements about a set are true? (No duplicates are allowed within the set) A) a set may contain no objects B) the objects in a set must be arranged in order C) there is a limit to the number of objects in the set D) there is a rule that determines if an object belongs to a set E) the objects in a set can have nothing in common QUESTION 16 3 Where E is the universal set, E={all integers between 1 and 15 inclusive} A={all even numbers} Which THREE of the following statements are true? A) A = {1,3,5,7,9,11,13,15} B) A = {1,3,5,7,9,11,13,15,16} C) A A = E D) A A = E) A = {2,4,6,8,10,12,14,16} F) A E

6 Marks QUESTION 17 3 Which THREE of the following standards are likely to lead to easily maintainable programs? A) regular use of GOTO statements B) functions should achieve as much as possible C) functions should have a single entry and exit point D) global variables should be used whenever possible E) variables should be named according to a convention F) functions should be short QUESTION 18 3 The following are types of documentation: A) structure diagram B) modification history C) user manual Identify the stages of a project where each of these types of documentation would be produced. Choose from: i) physical design ii) coding iii) logical design iv) maintenance v) implementation vi) requirements specification QUESTION 19 3 Which THREE of the following are characteristics of black box testing? A) data driven B) functional C) logical D) structural E) not concerned with system internals F) special interfaces required for testing QUESTION 20 3 When a new system is being tested, which THREE of the following are likely to involve the client? A) conformance testing B) regression testing C) alpha testing D) beta testing E) acceptance testing F) usability testing Total 40 Marks

7 SECTION B ANSWER ANY THREE QUESTIONS QUESTION 21 Marks a) State THREE reasons why program documentation is often of a poor quality. 3 b) i) Explain what is meant by the expression software engineering. 2 ii) Describe how the complexity of a product relates to the difficulty of its production. 2 iii) Explain why developing software is more difficult than developing a physical product. 6 c) i) In the context of systems development, explain the difference between a strategic study and a business 2 study. ii) State THREE reasons why a feasibility study might recommend that a new system should NOT be 3 adopted. iii) State TWO activities that take place during the logical design stage of system development. 2 QUESTION 22 Total 20 Marks a) State FOUR reasons why a company might decide to use a standard methodology for developing computer systems. 4 b) i) Explain what is meant by pseudo-code. 2 ii) Explain what is meant by normalising data. 2 c) i) Explain the meaning of the term encapsulation with reference to objects. 2 ii) Explain why encapsulation can improve the reliability of a program. 2 iii) With reference to object technology, explain the meaning of the term class. 2 iv) With reference to object technology, explain the term polymorphism. 2 d) The following structure diagram shows the processes required to produce an invoice. i) Identify TWO sequences shown in the diagram. 2 ii) Identify a process, indicated in the diagram, that is repeated. 1 iii) What determines how many times the repeated process identified in d) ii) is repeated? 1 Total 20 Marks

8 QUESTION 23 Marks a) i) State FOUR reasons why very few IT projects are written in assembly language. 4 ii) State TWO reasons why it may still be an advantage to make use of assembly language programming. 2 iii) Explain the difference between compilation and linking when developing a program. 4 iv) Distinguish between a compiler and an interpreter. 3 b) i) Explain the meaning of the term Fourth Generation Language. 2 ii) State TWO disadvantages of developing systems with fourth generation languages. 2 c) Explain with an example, what is meant by an event-driven system. 3 QUESTION 24 Total 20 Marks a) i) The best testing is destructive. Explain what is meant by this statement. 2 ii) Explain why it is not desirable for the programmers who developed a system to do their own testing. 2 iii) What makes a test a good one? 1 iv) Explain why it is not possible to test all aspects of a computer system. 2 v) Using a graph or otherwise, describe the relationship between the number of errors found in a test programme and the likelihood of there being more undiscovered errors. 1 b) i) Explain what is meant by scaffolding code. 2 ii) Explain why scaffolding code can lead to misleading test results. 2 c) i) Explain what is meant by integration testing. 2 ii) State TWO circumstances that might lead to integration testing uncovering a large number of errors. 2 d) i) Explain what is meant by desk checking. 2 ii) State TWO types of error that might be uncovered during compilation. 2 Total 20 Marks END OF PAPER

Computer Programming

AQA Level 3 Technical Level IT Computer Programming Unit Number: F/507/6465 Specimen Question Paper Materials For this paper you must have: Pens Pencils Instructions Use black ink or black ball-point pen