Advanced level 2025 South West Regional Mock computer science 1
Advanced level 2025 South West Regional Mock computer science 1
1. If our primary focus is on improving the
throughput of a single instruction stream, it is best
we use:
A multitasking
B multiprocessing
C pipeline processing
D vector processing
_____________________________________________
2. The performance of a CPU is most accurately
assessed by the number of instructions it can:
A decode per second
B execute per second
C fetch per second
D cycle per second
_____________________________________________
3. It temporarily holds data that is being transferred
to or from memory, and its size is typically the
same as the width of the data bus. It is:
A current instruction register
B memory buffer register
C cache memory
D auxiliary memory
_____________________________________________
4. What issue arises when adding the two 5-bit 2’s
complement numbers 10000 and 11101?
A overflow
B underflow
C sign error
D rounding error
_____________________________________________
5. It is not a representation of the decimal number
0.25 in floating-point binary with 4 bits for the
mantissa and 4 bits for the exponent, both in two’s
complement.
A 00100000
B 00010001
C 00110001
D 01001111
_____________________________________________
6. What is output R in the circuit below?
A B C D
_____________________________________________
7. Which of the following Boolean expressions is
correct?
A B C D
_____________________________________________
8. A device requires memory to hold instructions
that, once changed, will always be used. It is best
we use:
A PROM
B EPROM
C SRAM
D DRAM
_____________________________________________
9. Which of the following best describes machines
that must wait for all their data before their
instructions could be executed?
A Instruction flow machine architecture
B Programmable machine architecture
C Parallel machine architecture
D Data flow machine architecture
_____________________________________________
10. In his program, Ngu wants to access large sets of
data stored in adjacent memory locations. It is best
he uses:
A immediate addressing
B indexed addressing
C absolute addressing
D relative addressing
_____________________________________________
11. Which of the following is NOT a proper use of
artificial intelligence?
A Generating media content without proper
attribution or oversight
B Automating repetitive tasks in
manufacturing
C Analysing medical images to diagnose
diseases.
D Utilising automated systems to handle
customer inquiries and support.
_____________________________________________
12. Which of these categories does software as a
service (SaaS) belong to?
A grid computing
B cluster computing
C cloud computing
D distributed computing
