Ordinary level 2025 North West regional mock computer science 1
Ordinary level 2025 North West regional mock computer science 1
The technological difference between the
and third generation of computer is
A. Transistors were replaced by vacuum
on
tubes
B. Transistors were replaced by artificial
intelligence
C. Transistors were replaced by integrated
circuits
D. Integrated circuits were replaced by
Artificial Intelligence
From the truth table below, answer questions 2 and
10.
3
A B Y(output)
operating system
to a computer system.
A. Word processor
B. Disk defragmenter
| 0 0 0 1 1 0 |
0 1 1 |
| 1 1 1 | 0 |
C. Device driver
Figure1
2. Figure 1 is a representation for a
gate
D. Operating system
12. Concentric rings created on a storage device
during formatting a hard drive is called.
A. Platters
B. Clusters
C. Tracks
D. Sectors
13. An example of an optical storage device is a
A. Hard drive
B. Flash drive •
C. Compact disc
D. Magnetic tape
14. A storage medium that act as a buffer between the
CPU and the RAM is a
A. Virtual memory
B. Cache memory
C. ROM
D. Registers
15. Which access method is used to access data stored
on a magnetic tape?
A. Random access
B. Direct access
C. Indirect access
D. Sequential access
16. How many compact Disc of capacity 700MB
needed to completely transfer data of 8GB stored
in flash memory?
A. 11
B. 11.4
C. 11.7
D. 12
A. OR
B. XOR
C. XNOR
D. HAND
3 . What is the logic expression for the output Y?
A. Y = A+ B
B. Y =7LB
C. Y = A XOR B
D. Y = A +7?
4. The binary‘ equivalent of letter C in ASCII is
01100011. What will be the binary equivalent for
D?
A. 011011102
B. 011010112
C. HOJOlOlz
D. OIIOOJOO2
5. In the Unicode coding system, How many bit are
there in the character F2US
A. 4 .
B. 8
C. 16
D
– 32
6. The addition of the binary number 10111 and 1011
0
are
is:
A. 100011
B. 100010
C. 111010
D. 100101
7. The acronym BCD stands for?
A. Beginners Computer Designer
B. Binary Coded Decimal
C. Binary Computer Decimal
D. Beginners Computer Digital
8. The exact equivalent of 1GB in MB is?
A. 1000MB
B. 1000KB
C. 1024MB
D. 1024KB
17. The computer bus that carries information about
the location of a memory from the CPU to other
parts of the computer system
A. Control bus
B. Data bus
C. Signal bus
D. Address bus
