OCR GCSE Computer Science J277 -
Systems Architecture Questions with
Accurate Answers
Computer architecture - ANSWERSThe internal, logical structure and organisation of
the computer hardware
CPU - ANSWERSCentral processing unit of the computer containing the control unit,
ALU and cache memory
Control Unit - ANSWERSWorks with the CPU to control the flow of data within the
system
ALU - ANSWERSPerforms all the arithmetic and logical operations within the CPU
Random access memory (RAM) - ANSWERSMain memory of a computer that stores
data, app and the operating system whilst in use.
Cache memory - ANSWERSSpecial high speed memory used by the computer
Flash memory - ANSWERSSolid-state memory used as low cost secondary storage in
portable devices and as removable memory
Solid state - ANSWERSTechnology based on electronics with no moving parts
Secondary storage - ANSWERSNon-Volatile storage used to store programs and files
that need to be kept even when the power is not on
Fetch-execute cycle - ANSWERSThe processes of fetching instructions from memory,
decoding them and then executing them so that the CPU performs continously
Read only memory (ROM) - ANSWERSA non-volatile store for data in a computer that
cannot be overwritten.
Clock chip - ANSWERSThe electronic device in a computer that controls the timing of
signals
Bus - ANSWERSA part of the computer architecture that transfers data and signals
between the components of the computer
Motherboard - ANSWERSThe central printed circuit board (PCB) that holds the crucial
components of the system
Systems Architecture Questions with
Accurate Answers
Computer architecture - ANSWERSThe internal, logical structure and organisation of
the computer hardware
CPU - ANSWERSCentral processing unit of the computer containing the control unit,
ALU and cache memory
Control Unit - ANSWERSWorks with the CPU to control the flow of data within the
system
ALU - ANSWERSPerforms all the arithmetic and logical operations within the CPU
Random access memory (RAM) - ANSWERSMain memory of a computer that stores
data, app and the operating system whilst in use.
Cache memory - ANSWERSSpecial high speed memory used by the computer
Flash memory - ANSWERSSolid-state memory used as low cost secondary storage in
portable devices and as removable memory
Solid state - ANSWERSTechnology based on electronics with no moving parts
Secondary storage - ANSWERSNon-Volatile storage used to store programs and files
that need to be kept even when the power is not on
Fetch-execute cycle - ANSWERSThe processes of fetching instructions from memory,
decoding them and then executing them so that the CPU performs continously
Read only memory (ROM) - ANSWERSA non-volatile store for data in a computer that
cannot be overwritten.
Clock chip - ANSWERSThe electronic device in a computer that controls the timing of
signals
Bus - ANSWERSA part of the computer architecture that transfers data and signals
between the components of the computer
Motherboard - ANSWERSThe central printed circuit board (PCB) that holds the crucial
components of the system
