NATIONAL OPEN UNIVERSITY OF NIGERIA
14/16 AHMADU BELLO WAY, VICTORIA ISLAND, LAGOS
SCHOOL OF SCIENCE AND TECHNOLOGY
MARCH/APRIL 2014 EXAMINATION
COURSE CODE: CIT711
COURSE TITLE: COMPUTER FUNDAMENTALS
TIME ALLOWED: 21/2 HOURS
INSTRUCTION: ANSWER ANY FIVE (5) QUESTIONS. EACH QUESTION CARRY 14 MARKS
1. (a) Define the term Cryptography? (3 marks)
(b) What do you understand by Cryptanalysis? (2 marks)
(c) What are the basic steps involved in the art of Cryptanalysis and state what each step
requires. (9 marks)
2. (a) Compare and Contrast RAM and ROM (8 marks)
(b) State three reasons why an I/O module is needed (6 marks)
3. (a) State two main advantages of multiprogramming. (4 marks)
(b) In the context of computer programming, define the following: (10 marks)
i) Variable
ii) Functions
iii) Data type
iv) Array
v) Subroutine
4. (a) List and describe the four categories of Flynn’s classification of computers (12 marks)
(b) What is a system call? (2 marks)
5. (a) List the first six layers of the OSI reference model layer (6 marks)
(b) Enumerate the four time-honoured principles of ensuring security and recovery in case
of breaches of security (8marks)
6. (a) List the important aspects to be considered while designing a network (4 marks)
(b) State and discuss four advantages of having densely packed Integrated Circuits in the
Computer (10 marks)
7. (a) State four possible ways to increase the computer memory speed (4 marks)
(b) Illustrate the key features of the Von Neumann machine using a diagram (10 marks)
For the 2015 – till date past questions for this course CLICK HERE
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