CIT344 : INTRODUCTION TO COMPUTER DESIGN (2014)

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

  1. 4
  2. 3
  3. 7 ) 2 marks each
  4. 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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