GCSE COMPUTER SCIENCE: MAY 2025:
COMPUTER SYSTEMS PRACTICE
EXAMINATION 2026 QUESTIONS WITH
ANSWERS GRADED A+
◍ Arithmetic Logic Unit (ALU).
Answer: Performs operations on data e.g. Addition, subtraction
◍ CPU.
Answer: Central Processing Unit
◍ Control Unit (CU).
Answer: Coordinating activities of the CPU
◍ Registers.
Answer: Quick, small stores of data within the CPU
◍ Memory Address Register (MAR).
Answer: Holds memory address for data or a instruction about to be used by
the CPU
◍ Memory Data Register (MDR).
Answer: Holds actual data or instruction
◍ Accumulator.
Answer: Stores results of calculations in the ALU
◍ Program Counter (PC).
Answer: Holds memory address of the instruction for each cycle
◍ Fetch.
Answer: The next instruction is retrieved by CPU from main memory
, ◍ Decode.
Answer: The instruction is broken down and decided so computer can
understand
◍ Execute.
Answer: The CPU performs what the instructions told
◍ Embedded System.
Answer: A computer system built within a large device e.g. Camera, washer,
car
◍ Volatile.
Answer: Memory loses its data when power of
◍ Non-volatile.
Answer: Memory retains its data when power is lost
◍ Random Access Memory (RAM).
Answer: Read/write - function is to load open programs and operating
system data currently in use - volatile
◍ Read Only Memory (ROM).
Answer: Can only be read, can't be changed, stores essential programs to be
run in order to boot the computer - non-volatile
◍ Cache.
Answer: A type memory that stores copies of frequently used data, much
faster than RAM, lower capacity - closer to CPU
◍ Central Processing Unit (CPU).
Answer: Processes all of the data and instructions that make the system
work - can be effected by clock speed, number of cores, cache size
◍ Clock speed.
Answer: How fast the computer does the FDE cycle
◍ virtual memory.
Answer: A memory management procedure needed when the RAM is full so
a temporary section is made which acts like a part of RAM
COMPUTER SYSTEMS PRACTICE
EXAMINATION 2026 QUESTIONS WITH
ANSWERS GRADED A+
◍ Arithmetic Logic Unit (ALU).
Answer: Performs operations on data e.g. Addition, subtraction
◍ CPU.
Answer: Central Processing Unit
◍ Control Unit (CU).
Answer: Coordinating activities of the CPU
◍ Registers.
Answer: Quick, small stores of data within the CPU
◍ Memory Address Register (MAR).
Answer: Holds memory address for data or a instruction about to be used by
the CPU
◍ Memory Data Register (MDR).
Answer: Holds actual data or instruction
◍ Accumulator.
Answer: Stores results of calculations in the ALU
◍ Program Counter (PC).
Answer: Holds memory address of the instruction for each cycle
◍ Fetch.
Answer: The next instruction is retrieved by CPU from main memory
, ◍ Decode.
Answer: The instruction is broken down and decided so computer can
understand
◍ Execute.
Answer: The CPU performs what the instructions told
◍ Embedded System.
Answer: A computer system built within a large device e.g. Camera, washer,
car
◍ Volatile.
Answer: Memory loses its data when power of
◍ Non-volatile.
Answer: Memory retains its data when power is lost
◍ Random Access Memory (RAM).
Answer: Read/write - function is to load open programs and operating
system data currently in use - volatile
◍ Read Only Memory (ROM).
Answer: Can only be read, can't be changed, stores essential programs to be
run in order to boot the computer - non-volatile
◍ Cache.
Answer: A type memory that stores copies of frequently used data, much
faster than RAM, lower capacity - closer to CPU
◍ Central Processing Unit (CPU).
Answer: Processes all of the data and instructions that make the system
work - can be effected by clock speed, number of cores, cache size
◍ Clock speed.
Answer: How fast the computer does the FDE cycle
◍ virtual memory.
Answer: A memory management procedure needed when the RAM is full so
a temporary section is made which acts like a part of RAM
