INFORMATION TECHNOLOGY PRINCIPLES

Transcription

1 INTBUS9 NOVEMBER 2013 EXAMINATION DATE: 6 NOVEMBER 2013 TIME: 14H00 16H00 TOTAL: 100 MARKS DURATION: 2 HOURS PASS MARK: 40% (DBM-07) INFORMATION TECHNOLOGY PRINCIPLES THIS EXAMINATION PAPER CONSISTS OF 4 SECTIONS: SECTION A: CONSISTS OF: (i) 10 MULTIPLE-CHOICE QUESTIONS (10 MARKS) (ii) 5 TRUE OR FALSE QUESTIONS (10 MARKS) (iii) 10 MATCHING-STATEMENT QUESTIONS (10 MARKS) SECTION B: SECTION C: SECTION D: CONSISTS OF 10 SHORT QUESTIONS CONSISTS OF 4 LONG ANSWER QUESTIONS CONSISTS OF 1 INTERPRETATIVE QUESTION ANSWER THE QUESTION (10 MARKS) (45 MARKS) (15 MARKS) INSTRUCTIONS: 1. Read the following instructions carefully before answering the paper, as failure to act upon them will result in a loss of marks. 2. Write your answers in your answer book, which is provided in the exam. 3. Ensure that your name and student number are clearly indicated on your answer book. 4. Write your answers in either blue or black ink in your answer book. 5. Read each question very carefully before you answer it and number your answers exactly as the questions are numbered. 6. Begin with the question for which you think you will get the best marks. 7. Note the mark allocations for each question give enough facts to earn the marks allocated. Don't waste time by giving more information than required. 8. You are welcome to use diagrams to illustrate your answers. 9. Please write neatly we cannot mark illegible handwriting. 10. Any student caught cheating will have his or her examination paper and notes confiscated. The College will take disciplinary measures to protect the integrity of these examinations. 11. If there is something wrong with or missing from your exam paper or your answer book, please inform your invigilator immediately. If you do not inform your invigilator about a problem, the College will not be able to rectify it afterwards, and your marks cannot be adjusted to allow for the problem. 12. This paper may be removed from the examination hall after the examination has taken place. DAMELIN CORRESPONDENCE COLLEGE NOVEMBER 2013 PAGE 1 OF 8

2 SECTION A (30 MARKS) (i) MULTIPLE-CHOICE QUESTIONS Choose the correct option for each of the following. Write only the question number and your chosen answer. For instance, if you think that the correct answer for number 1 is, then write it as Which one of the following types of disk storage is not portable? stiffy disks CD-ROM disks hard disks compact disks 2. What system does a computer use for arithmetic? decimal binary hexadecimal octal 3. How would you classify a touch sensitive screen? an input device an output device an input-output device a storage device 4. Which Excel formula will calculate the total of values in column E up to row 40? =SUM(E1:E40) =TOT(1E:40E) =TOT(E40:E1) =TOT(E1:E40) 5. How would you classify Microsoft Word software? applications software systems software utility software operating software 6. What do we call the software that contains all the procedures and rules for transferring data on a network? OS protocol NOS channel DAMELIN CORRESPONDENCE COLLEGE NOVEMBER 2013 PAGE 2 OF 8

3 7. Who uses CASE tools most often? systems analysts programmers database managers computer operators 8. Which one of the following is not a database system? Natural / Adabas Microsoft Excel Oracle dbase 9. What name do we use to describe the situation when information regarding the structure of data is separated from the program? data redundancy data / program independence data integrity data quality 10. Which one of the following printers is classified as an impact printer? laser thermal ink-jet dot matrix [10] (ii) TRUE OR FALSE QUESTIONS Indicate whether the following statements are True or False. Motivate all your answers. 1. Examples of input devices are a keyboard, printer and screen. 2. A UPS is battery operated. 3. DML is a set of commands that are used to manipulate data definitions in the database. 4. Program-data dependence is an advantage of the use of a DBMS. 5. A star network always has a file server. [5 2 = 10] DAMELIN CORRESPONDENCE COLLEGE NOVEMBER 2013 PAGE 3 OF 8

4 (iii) MATCHING-STATEMENT QUESTIONS Match the statements in Column B to the terms in Column A. Write down the answers only, for example 1.. Column A Column B 1. DFD the most flexible data model 2. EFT a computer expert who uses his knowledge to access and change or steal information on someone else's computer system 3. relational a program, almost like a virus, that makes copies of itself until a computer crashes 4. MICR a network that connects millions of computers around the world 5. hacker (e) a record of all changes to a database including who changed what and when 6. ALU (f) a technique for scrambling data to make it unreadable 7. audit trail (g) technology used to print account and cheque numbers on cheques 8. worm (h) a way of transferring money from one bank account to another electronically 9. encryption (i) the part of the CPU that performs arithmetic instructions 10. Internet (j) a diagram showing the flow of data between processes [10] [30] DAMELIN CORRESPONDENCE COLLEGE NOVEMBER 2013 PAGE 4 OF 8

5 SECTION B: SHORT QUESTIONS (10 MARKS) QUESTION 1 What do we call an experimental model of a computer system? [1] QUESTION 2 What do we call a backup copy of only the data that changed since the last copy was taken? [1] QUESTION 3 What is software piracy? [1] QUESTION 4 What do we call the formal set of stages with which we approach the development of a computer system? [1] QUESTION 5 What kind of software should you buy to protect your computer from attacks? [1] QUESTION 6 In what part of a database are data definitions stored? [1] QUESTION 7 How many bits are there in a byte? [1] QUESTION 8 What do we call the language provided by relational database systems for specifying search and selection criteria as well as updating the database? [1] QUESTION 9 What do we call permanent memory? [1] DAMELIN CORRESPONDENCE COLLEGE NOVEMBER 2013 PAGE 5 OF 8

6 QUESTION 10 What is a Thesaurus? [1] [10] DAMELIN CORRESPONDENCE COLLEGE NOVEMBER 2013 PAGE 6 OF 8

7 SECTION C: LONG ANSWER QUESTIONS (45 MARKS) QUESTION 1 Explain the meaning of each of the following database terms: DBMS (2) entity (2) attribute (2) unique key (2) (e) foreign key (2) [10] QUESTION 2 Name and briefly describe the four most common methods of converting a manual system to a computer system. Mention the degree of risk and compare costs for each option. [4 4 = 16] QUESTION 3 What are the four main items needed by each computer on a network? (4) Name four common network topologies. (4) What do we call the set of rules for transferring data along a network, also referred to as the logical arrangement? (1) [9] QUESTION 4 Name five types of computer in terms of size and describe what each is used for in general. [5 2 = 10] [45] DAMELIN CORRESPONDENCE COLLEGE NOVEMBER 2013 PAGE 7 OF 8

8 SECTION D: INTERPRETATIVE QUESTION (15 MARKS) ANSWER THE QUESTION QUESTION 1 Refer to the following spread sheet and provide the formulae used in the following cells. Write only the letter, the cell and your answer. (e) (f) (g) B7 D4 B15 D15 B18 C18 D18 [15] [15] Section A: 30 marks Section B: 10 marks Section C: 45 marks Section D: 15 marks TOTAL: 100 MARKS DAMELIN CORRESPONDENCE COLLEGE NOVEMBER 2013 PAGE 8 OF 8