cameroon gce A level June 2023 computer science 1
cameroon gce A level June 2023 computer science 1
What is the equivalent in hexadecimal
representation of the decimal number 973?
A 4BC.
B 3DC.
C 4CB.
D 3CD.
7.
A D R
F F T
i F T F
2. Machines A and B execute independently. T F F
However, B sometimes asks A to stop and
attend to certain concerns once it reaches a
convenient execution point. What is the best
option for machine B to use on A?
A Send a signal to machine A.
B Send a message to machine A.
C Interrupt machine A.
D Poll machine A.
T T F
A A + B A B.
B A – B + A ’ B.
C
A + B + A – B.
D
A – B + J~B.
Which of the following best describes machines
that must wait for all their data before their
instructions could be executed?
A Programmable machine architectures.
B Parallel machine architectures.
Instruction flow machine architectures.
D Data flow machine architectures.
8.
3. What is the total addressable lines for a 2M by
16 memory?
A 20.
B 21.
C 22.
D 32
• C
It is NOT a computer threat linked to loss of
security.
A Leave doors to a Computing Lab open.
B Fail to notice an encrypted message.
C Inadequate firewall in a network system.
D Damage to data from river floods.
9.
The logic gate that obtains a similar operation as
the sum in the half adder is?
A NOR.
B XOR.
C XNOR.
D NAND.
4.
What is the result of the following one’s
complement binary arithmetic?
Oil 111 101 + 110 110 111
A 100 110 110.
B 000 110 110.
C 001 110 100. •
D 001110 101.
10.
It is an advantage of using two’s complement
A Addition can be done using hardware
meant for subtraction operations.
B Addition and subtraction can be done
using hardware meant for addition
operations.
C Addition and subtraction can be done
using hardware meant for subtraction
operations.
D Subtraction can be done using hardware
meant for subtraction operations.
5.
1 1. Processes that are in main memory and are
ready and waiting to execute are kept on a list
called a(n):
A Job queue.
B Ready queue.
C Execution queue.
D ‘ Process queue.
!
A computer’s type, processor and operating
system define its
A Brand.
B Size.
C Platform.
D Speed
