cameroon gce A level 2024 automation 2
cameroon gce A level 2024 automation 2
SECTION I: COMBINATORIAL LOGIC: (Answer any two Questions 7.5 marks x 2 15 marks)
QUESTION 1
Logic gates arc the backbone of building electronic circuits
a) Name the three main basic gates.
b) Cite two applications of combinatorial logic.
c) Draw the truth table of the logic gate of Figure 1 below
(1.5 marks)
(1 mark)
(5 marks)
X
=1 Z
Y
QUESTION 2
Let us consider the Karnaugh Map of M
AB
00 01 11 10
| 00 | 1 | 0 | 1 | |
| CD | 01 | 0 | 0 | 0 |
1
0
11 0 0 0 0
10 1 0 1 1
(3marks)
(1.5marks)
(3 marks)
a) Establish the truth table of the M
b) Extract from the Karnaugh map the Simplified equation of M
c) Draw the simplified electrical diagram of M
QUESTION 3
Let consider the numbers, A= 11100011011011(2)
a) convert A into hexadecimal and B into binary
b) convert B into decimal
C) Q(16)= C(16) –A{16)
B=7564(8) C= BEFA (16)
(3 marks)
(2.5 marks)
(2marks)
SECTION II: MICROPROCESSOR AND MICROCONTROLLER
(Answer any two Questions 5marks x 2=10 marks)
QUESTION 4
A microprocessor has a capacity of 128 bits and 4 data lines. Calculate the address line of the microprocessor.
(5 marks)
QUESTION 5
Define the following term s as use in microcontroller.
a) RISC b) power supply C) Program counter d) CISC
| e) clock generator. | (5 marks) | Cite 5 devices that use microprocessor. |
| (5 marks) |
QUESTION 6
SECTION III: DIGITAL CIRCUIT (Answer any two Questions 5 marks x 2 = 10 marks)
QUESTION 7
A modulo eight binary Counter is use to display the labeling of the school from form one to upper sixth.
a) What will be he indication of form one and Upper sixth?
b) What is the labeling on the principal office if the numbering started from his office?
c) How many flip flop are needed to realized this counter;
(2 marks)
(1 mark)
(2 marks)
QUESTION 8
A modulo five‘counter is used to display the gears of a vehicle;
a) Cite two type of asynchronous counter
b) Realize a modulo five asynchronous counter using JK flip flops
(1 mark)
(4 marks)
QUESTION 9
a) Cite three types of flip flops
b) Established the truth table of a RS– flip flops
(1.5 marks)
(3.5 marks)
