NATIONAL OPEN UNIVERSITY OF NIGERIA
14/16 AHMADU BELLO WAY, VICTORIA ISLAND, LAGOS
SCHOOL OF SCIENCE AND TECHNOLOGY
MARCH/APRIL 2014 EXAMINATION
COURSE CODE: CIT 723
COURSE TITLE: OPERATING SYSTEMS DESIGN AND PROGRAMMING
TIME ALLOWED: 21/2 HOURS
INSTRUCTION:ANSWER ANY FIVE (5) QUESTIONS. EACH QUESTION CARRIES 14 MARKS
1. (a) State three qualities of an operating system in terms ofCOST(6 marks)
(b) What is Zooming User Interface? (3 marks)
(c) What are the functions of the following start-up menu options? (5 marks)
(i) Programs (ii) Settings (iii) Help (iv) Run (v) Log Off
2. (a) What is the difference between Ethernet LANs and Token ring LANs (4 marks)
(b) With the aid of a diagram differentiate between networks based on serial cables and
parallel cables (10 marks)
3. (a) What are network protocols ? (4 marks)
(b) List and describe five popular network protocols (10 marks)
4. (a) What do you understand by system security (4 marks)
(b) What are the five consequences of security violation (10 marks).
5. (a) What are Media access protocols? (2 marks)
(b) State the three most common implementations of Media Access Protocols (6 marks)
(c) State six advantages of LINUX (6 marks)
6. (a) What are Fault-Tolerant Systems (2 marks)
(b) List five alternatives that Fault-tolerant systems offer for data redundancy (5marks)
(c) List seven causes of a network disaster ranging from human acts to natural causes
(7 marks)
7. (a) What is Single Network Adapter (UNICAST) (2 marks)
(b) State three advantages of Single Network Adapter (UNICAST) (6 marks)
(c) State three disadvantages of Single Network Adapter (UNICAST) (6 marks)
For the 2015 – till date past questions for this course CLICK HERE
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