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Bit 101: Introduction To Computer Systems Question Paper

Bit 101: Introduction To Computer Systems

Course:Bachelor Of Information Technology

Institution: South Eastern Kenya University question papers

Exam Year:2013

SOUTH EASTERN KENYA UNIVERSITY

UNIVERSITY EXAMINATIONS 2012/2013

FIRST YEAR FIRST SEMESTER EXAMINATIONS FOR THE DEGREE OF BACHELOR OF SUPPLIES AND CHAIN MANAGEMENT AND BACHELOR OF INFORMATION TECHNOLOGY

BIT 101: INTRODUCTION TO COMPUTER SYSTEMS

DATE: APRIL 2013 TIME: 2 HOURS

Answer question one and two in section a and any other three questions from section b.

SECTION A (COMPULSARY 31 marks)
Question One (16 marks)

(a) (i) Explain the difference between computer hardware and computer software. (2 marks)
(ii) Fred is first year student taking computer science and wants to buy a lap top for his use. State two factors he should consider when buying the laptop. (2 marks)
(iii) State two advantages of fiber optic compared to copper cable as a transmission medium. (2 marks)

(b) Describe the use of computers in the following areas:
(i) education and research;
(ii) hospitals.
(4 marks)
(c) (i) Distinguish between SRAM and DRAM. (2 marks)

(ii) Describe each of the following levels of programming languages:
I. machine language;
II. high level language. (4 marks)

Question Two (15 marks)

(a) (i) Explain two advantages of flat screens over cathode ray tubes/thermionic valves

screens. (2 marks)

(ii) Convert 101011101100112 to octal numbers system. (2 marks)

(b) Outline THREE functions of operating system in disk management. (3 marks)

(c) Explain four reasons why a networked computer will be better than a standalone computer. (4 marks)

(d) Explain the following concepts with respect to data communications computer networks:
(i) bluetooth technology;
(ii) firewall. (4 marks)

SECTION B: ATTEMPT THREE QUESTIONS IN THIS SECTION (39 MARKS)

Question Three (13 Marks)

(a) Distinguish between:
(i) Digital and analogue computers;
(ii) Teleconferencing and telecommuting. (4 marks)
(b) State the technology behind each of the following computer generation:
(i) 1st Generation;
(ii) 2nd Generation;
(iii) 3rd Generation. (3 marks)
(c) With the aid of a block diagram, outline the functional organization of a digital
computer system. (6 marks)

Question Four (13 marks)
(a) (i) Distinguish between system software and application software. (2 marks)

(ii) A newspaper publishing company intends to buy four computers so as to improve
its business. Outline three factors the company will consider other than cost.
(3 marks)
(iii) Distinguish between a scanner and a plotter in terms of functionality. (2 marks)
(iv) Explain two advantages of off-the shelf software over tailor-made software.

(2 marks)
(b) You are a supervisor of the ICT department in your company. Explain four factors that you will consider when selecting the application software for the company.(4marks)

Question Five (13 marks)
(a)
The manager of a recently established vernacular radio station attended an ICT seminar at SEKU. One of the main topics covered during the seminar was “operating system”. He would like other staff members to go through the same internally before computerizing operations in the organization. He has approached you as a young graduate from college to assist him in preparing a presentation on the topic using PowerPoint on the topic “Operating System”.
Required
(i) Define the term operating system (1 mark)
(ii) Giving an example in each, differentiate between single tasking operating system and multitasking operating system. (4 marks)
(iii) Describe any three functions of operating system. (3 marks)
(b) Table 1 below shows certain terms used in computing. Write the meaning of each abbreviation in full. (5 marks)
Abbreviation Meaning in full
BIOS
URL
WIMP
EEPROM
EBCDIC

Table 1
Question six (13 marks)
(a) Convert the following as indicated:
(i) 15910 to binary equivalent; (2 marks)
(ii) 11710 to hexadecimal number equivalent; (2 marks)
(iii) CDFF31H to decimal number equivalent. (2 marks)
(b) Perform the following operations as indicated:
(i) 1101012 +1110012 (2 marks)
(ii) 1101012-1110012, using the two’s compliment. (2 marks)
(iii) 1111/11 using modulo 2. (3 marks)
Question seven (13 marks)

(a) Outline three commandments of computer ethics. (3 marks)
(b) Discuss the positive contribution of internet technology in the current society.(5 marks)
(c) Discus five computer crimes perpetuated by the use of ICT. (5 marks)

Bit 101: Introduction To Computer Systems question paper

Bit 101: Introduction To Computer Systems Question Paper

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