NATIONAL OPEN UNIVERSITY OF NIGERIA
14/16 AHMADU BELLO WAY, VICTORIA ISLAND, LAGOS
SCHOOL OF SCIENCE AND TECHNOLOGY
MARCH/APRIL 2014 EXAMINATION
COURSE CODE: CIT344
COURSE TITLE: INTRODUCTION TO COMPUTER DESIGN
TIME ALLOWED: 3HOURS
INSTRUCTION:ANSWER ANY FIVE (5) QUESTIONS.
QUESTIONS
1a. Write a simple program for declaring a CPU “fetch-execute” cycle. (10 marks)
1b. Distinguish between the two (2) main types of sequential circuits. (4 marks)
[Total
= 14 marks]
2. Study the block diagram provided below carefully, as it will serve as your reference in
answering the questions that follow:
2a.Which operation is depicted in the diagram? (4 marks)
2c.Give a detailed explanation of how this process is implemented. (10marks)
[Total
= 14 marks]
3a. Give a brief explanation of how sequential circuits are implemented, using a well-labelled block diagram to illustrate this. (8 marks)
3b. Give the hexadecimal equivalent of the following:
i. 11010110101110010110
ii. 101110010110
. (6 marks)
[Total
= 14 marks]
4a. Give the binary equivalent of the following decimal numbers
- 4
- 3
- 7 ) 2 marks each
- 5
(8 marks)
4b. From the perspective of in computer design, list 2 key operations performed on memories. (6 marks)
[Total
= 14 marks]
5a. Give a brief explanation of how sequential circuits are implemented, using a well-labelled block diagram to illustrate this. (8 marks)
5b. Distinguish between the two (2) common types of sequential circuits. (6 marks)
[Total
= 14 marks]
6a. Find the sum of two 2-digit BCD numbers, 42 and 31. Your result should be in BCD.
(8 marks)
6b. List 3 common forms of edge-triggered flip-flops employed in digital logic circuits.
(6 marks)
[Total
= 14 marks]
7a. Explain with the aid of a diagram how a full adder can be built from half adders
(10 marks)
7b. Describe the term ‘Microprocessor” in computer design. (4 marks)
[Total
= 14 marks]
For the 2015 – till date past questions for this course CLICK HERE
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