NATIONAL OPEN UNIVERSITY OF NIGERIA
14/16 AHMADU BELLO WAY, VICTORIA ISLAND, LAGOS
SCHOOL OF SCIENCE AND TECHNOLOGY
MARCH/APRIL 2014 EXAMINATION
COURSE CODE: CIT759
COURSE TITLE: MICRO-COMPUTING AND WWW
TIME ALLOWED: 3HOURS
INSTRUCTION: ATTEMPT ANY FIVE (5) QUESTIONS
Question 1
a. State and explain the components of a microcomputer system with appropriate examples. (8 marks).
b. List and explain 3 types of adapter cards (6 marks)
c. Calculate the number of bytes required to store “illumination” (0.5 marks)
d. Express the exact number of bytes in 1 TB as a power of 2. (3 marks)
Question 2
a. State the functions of 2 components of the CPU. (4 marks)
b. State the major difference between RAM and ROM (2.5 marks).
c. State the Windows operating system shortcut keys to perform the following operations:
i. Exit a program (2 marks)
ii. Open the help/support menu. (1 mark)
iii. Select all (2 marks)
iv. Copy (2 marks)
v. Paste (2 marks)
d. Briefly discuss how data storage is done using floppy disks (4 marks)
Question 3
a. List and explain the variants of Compact Disc (CD). (4 marks)
b. List and explain the variants of Digital Versatile Disc/ Digital Video Disc (DVD) (8 marks).
c. List 5 web browsers that run on Windows operating systems. (2.5 marks)
d. List 6 web search engines. (3 marks)
Question 4
a. Explain briefly how a keyboard works (2 marks).
b. Explain briefly how a mouse works (3.5 marks).
c. Discuss briefly touch-pads and how they work (3 marks).
d. List and explain briefly 2 types of optical scanners (5 marks).
e. List 2 components in a voice recognition system (4 marks).
Question 5
Write briefly on the following;
a.
i) Ergonomics (4 marks)
ii) Resolutions (4 marks)
iii) Newsgroup (4 marks)
iv) Motherboard (4 marks)
b. what are secondary storage devices? (1.5 marks)
Question 6
a. List 2 components of any hardware recognition/ input devices. (2 marks)
b. List 2 display technologies used in PC systems. (2 marks)
c. Complete the table below summarizing the advantages and disadvantages of the different types of monitors (8 marks)
CHARACTERISTICS
CRT MONITOR
FLAT PANEL MONITOR
Size and weight
Power consumption
Potential viewing problems
Price
d. Briefly discuss the following:
i. Ink jet printers (3 marks)
ii. Dot-matrix printers (2.5 marks)
Question 7
a. List and explain 5 common image file formats/types, their extensions and their meanings (10 marks).
b. List and explain 3 sound file formats, their extensions and their meanings (6 marks).
c. List 2 common video file formats stating, their extensions and their meanings (1.5 marks).
You can get the soft copy for this course (2014 – to date) at a little token or the exam summary answers for this course from 08039407882
Exam summary sample below
