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National Open University Exam Past Question – CIT759 October, 2013 Examination

NATIONAL OPEN UNIVERSITY OF NIGERIA CIT759 Micro-Computing and WWW

14/16, Ahmadu Bello Way, Victoria Island

 

SCHOOL OF SCIENCE AND TECHNOLOGY October, 2013 Examination

 

 

 

 

Course Code:  CIT759                                                                                                                       Time Allowed3hrs

 

Course Title: Micro-Computing and WWW Instruction: Attempt any five (5) questions

Question 1

 

  1. List 2 components of hardware recognition input devices. (2 marks)
  2. b. List 2 display technologies used in PC system (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    

 

  1. d. Briefly discuss the following:
  2. Ink jet printers (3 marks)
  3. Dot-matrix printers (2.5 marks)

 

Question 2

  1. Explain briefly how a keyboard works (2 marks). b. Explain briefly how a mouse works                                                                                                                         (4 marks). c. Discuss briefly touch-pads and how they work                                                                                                     (3 marks). d. List and explain briefly 2 types of optical scanners                                                                                              (5 marks).
  2. List 2 components in a voice recognition system (3.5 marks).

 

Question 3

  1. List an explain 5 common image file formats/types their extensions and their meanings (10 marks). b. List an explain 3 sound file formats their extensions and their meanings                                                       (6 marks).
  2. List 2 common video file formats stating their extensions and their meanings (1.5 marks).

 

Question 4

Write briefly on the following;

  1. a) Pixels
  2. b) Arithmetic Logic Unit (ALU)
  3. c) Byte
  4. d) Home page

 

Question 5

 

  1. With appropriate examples, state and explain the components of a microcomputer

system.                                                                                                                                                (8 marks). b.   List and explain the 3 types of adapter cards                                                                                (6 marks)

  1. Calculate the number of bytes required to store “illumination”                                               (0.5 marks)
  2. d. Express the exact number of bytes in 1 TB as a power of 2.                                                      (3 marks)

 

 

Question 6

Write briefly on the following;

  1. i) Ergonomics ii) Resolutions iii) Newsgroup
  2. iv) Motherboard

 

Question 7

 

  1. State the functions of the 2 components of the CPU. (4 marks)
  2. b. State the major difference between RAM and ROM (2.5 marks).
  3. State the Windows operating system shortcut keys to perform the following operations:
  4. 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)
  5. d. Briefly discuss data storage using floppy disks (4 marks)

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