Final Examination Semester 2 / Year 2007

Transcription

1 Southern College Kolej Selatan Final Examination Semester 2 / Year 2007 COURSE : COMPUTER SYSTEM COURSE CODE : CSIS1003 TIME : 2 1/2 HOURS DEPARTMENT : COMPUTER SCIENCE CLASS : CS07-B LECTURER : ROSLINDA MAZNAN Student s ID : Batch No. : Notes to candidates: 1) This question paper consists of 5 pages and 3 parts. 2) Part A consists of 20 multiple-choice questions, Part B consists of 4 short answer questions and Part C consists of 2 essay questions. 3) Answer all questions in answer booklet.

2 PART A (20 x 1 mark = 20 marks): COMPUTER SYSTEM 1. Three commonly used audio output devices are speakers,, and earphones. a. woofers b. microphones c. headphones d. monitors 2. With, a computer or other device transmits output to a printer via radio waves. a. Infrared printing b. Laser printing c. Bluetooth printing d. Large-format printing 3. A(n) printer forms characters and graphics on paper by striking a mechanism against an inked ribbon that physically contacts the paper. a. ink-jet b. photo c. impact d. nonimpact 4. A single device that looks like a copy machine but provides the functionality of a printer, scanner, copy machine, and perhaps a fax machine is called a. a. total printer b. subwoofer c. multifunction peripheral d. master printer 5. LCD screens produce color using either passive-matrix or technology. a. HDTV b. gas plasma c. CRT d. active-matrix 6. The number of times the image is drawn per second is called the. a. access time b. redraw rate c. refresh rate d. bit depth 7. PC Cards commonly are used in. a. midrange servers b. notebook computers c. mainframe computers d. supercomputers 1/5

3 8. The number of bits in an area on a storage medium is referred to as. a. capacity b. access time c. form factor d. density 9. Reorganizing the disk, so the files are stored in contiguous sectors, is known as. a. scanning b. reformatting c. defragmenting d. compressing 10. The core of an operating system is called the. a. kernel b. BIOS c. registry d. boot drive 11. Recovery disks are also known as. a. boot drives b. system files c. boot disks d. kernels 12. The is firmware that contains the computer's startup instructions. a. BIOS b. POST c. kernel d. CMOS 13. is a type of application software used for communications. a. FTP software b. Word processing software c. Database software d. Image editing software 14. supports faster transfer rates when receiving data than when sending data. a. ADSL b. ATM c. ISDN d. Dial-up 2/5

4 15. Walls, ceilings, and electrical devices such as cordless telephones and microwave ovens can disrupt communications. a. Ethernet b. phoneline c. powerline cable d. wireless 16. Peer-to-peer networks are ideal for. a. large businesses b. mid-sized businesses c. very small businesses d. small- to mid-sized businesses 17. The processor's temporarily hold data and instructions. a. registers b. boards c. control units d. pointers 18. is a type of nonvolatile memory that can be erased electronically and rewritten. a. Flash memory b. RAM c. CMOS d. ROM 19. The transfers information about where data should reside in memory. a. data bus b. memory bus c. address bus d. delivery bus 20. Some printers can connect to the system unit using a(n). a. external modem b. bay c. CMOS d. parallel port 3/5

5 PART B (30 marks): 1. Briefly explain the following terms (5 x 2 marks = 10 marks): a) Bit b) Volatile memory c) TCP/IP d) System software e) Warm boot 2. Briefly explain any two types of wireless transmission media (5 marks). 3. Briefly describe any two functions of an operating system (5 marks). 4. Solve the following questions (5 x 2 marks = 10 marks): a) Interpret in decimal if the number was stored as sign-and-magnitude representation. b) Store -56 in a 16-bit memory location using one s complement integer. c) Store -50 in a 16-bit memory location using two s complement representation. d) Interpret in decimal if the number was stored as two s complement integer. e) Show the octal equivalent of the bit pattern PART C (50 marks): 1. You are currently taking a computer course in a college. Your course mate would like to buy a personal computer (PC). Give him some information based on the questions as follows: i. What is RAM and microprocessor (5 marks)? ii. Explain to him how a processor completes a machine cycle (10 marks)? iii. Discuss the importance of RAM and the microprocessor in a PC (5 marks). iv. What he needs to consider for the selection of RAM and microprocessor if he would like to buy a PC (5 marks). 4/5

6 2. The senior management at ABC-Mart, a larger retail company with worldwide sales found that the company s computer system was at severe risk. You have been hired as consultants to deal with the following vulnerabilities: - software theft - hardware theft and vandalism - unauthorized access - information theft - system failure Explain the issues associated with each of the vulnerabilities and make recommendations as to how the company can deal with them (25 marks) /5