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Bbit 1102, Hbc 2109 : Foundations Of Computer Systems Question Paper

Bbit 1102, Hbc 2109 : Foundations Of Computer Systems

Course:Bachelor Of Commerce

Institution: Jomo Kenyatta University Of Agriculture And Technology question papers

Exam Year:2011

JOMO KENYATTA UNIVERSITY
OF
AGRICULTURE AND TECHNOLOGY

University Examinations 2011/2012

FIRST YEAR FIRST SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR OF BUSINESS INFORMATION TECHNOLOGY/ BACHELOR OF COMMERCE/ BACHELOR OF DEVELOPMENT STUDIES

BBIT 1102, HBC 2109 : FOUNDATIONS OF COMPUTER SYSTEMS

DATE: AUGUST 2011 TIME: 2 HOURS

INSTRUCTIONS: ANSWER QUESTION ONE (COMPULSORY) AND
ANY OTHER TWO QUESTIONS.
______________________________________________________________________

QUESTION ONE (30 MARKS)

(a) Explain the meanings of the following terms: [4 marks]

(i) Data.
(ii) Information.
(iii) Information system.
(iv) Knowledge.

(b) Outline any four advantages of using a computer based information system over manual information system. [4 marks]

(c) A machine language is the language the CPU use to process and represent data. A binary numbering system is preferred in designing the computer system as the machine language. Explain the concept behine the use of binary numbering system.
[4 marks]
(d) Perform the following numbering system conversion. [6 marks]

(i) 11Ø1Ø12 into decimal.
(ii) 4658 into binary.

(e) Explain the series of events that take place during an instruction cycle. [4 marks]

(f) State and explain any four functions of the CPU in a computer system. [4 marks]

(g) Okello was copying a 10 GB of a movie from a DVD to a hard disk. Calculate the time it took for Okello to copy the data if the average on speed was 120KB/S. [4 marks]

QUESTION TWO (20 MARKS)

(a) Explain the meanings of the following terms as used in secondary storage management: [6 marks]

(i) Formatting.
(ii) Fragmentation of disk.
(iii) Disk defragmentation.

(b) Calculate the maximum capacity for a hard disk having 200 tracks where each track has 5000 sectors and each sector can accommodate a maximum of 512 bytes. Explain your answer in MB. [4 marks]

(c) Give two examples of each of the following: [4 marks]

(i) Magnetic storage disks.
(ii) Optical storage disk.
(iii) Sequential access storage device.
(iv) Direct access storage device.

(d) Outline the difference between the following: [6 marks]

(i) Microprocessor and processor.
(ii) Primary memory and secondary memory.
(iii) RAM and ROM.

QUESTION THREE (20 MARKS)

(a) State the function of the following register in a computer:
[4 marks]

(i) MAR
(ii) MBR
(iii) 1R
(iv) pC

(b) Differentiate between the following: [6 marks]

(i) ROM and PROM.
(ii) EPROM and EEPROM.
(iii) Flash ROM and EEPROM.

(c) Explain two advantages of open source software compared to closed source softwares. [4 marks]

(d) Give two examples of each of the following: [6 marks]

(i) Operating systems.
(ii) Application softwares.
(iii) Spreadsheets.
(iv) Mode processors.
(v) Browsers.
(vi) Presentation software.

QUESTION FOUR (20 MARKS)

(a) Describe any four functions of spreadsheets. [4 marks]

(b) State and explain four types of data in Microsoft excel program.
[4 marks]

(c) State and explain any five functions of operating systems.
[5 marks]

(d) Differentiate between the following terms. [6 marks]

(i) Virus and worm.
(ii) A worm and Trojan.
(iii) Trojan and software.

Bbit 1102, Hbc 2109 : Foundations Of Computer Systems Question Paper

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