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OCR A-Level Computer Science evaluation test guide well defined. Contemporary Architecture - Answer Usually a combined selection of the 2 basic architectures' - taking the best of both worlds. Simplicity of Von Neumann, but the useful features of$11.99
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OCR A-Level Computer Science evaluation test guide well defined. Contemporary Architecture - Answer Usually a combined selection of the 2 basic architectures' - taking the best of both worlds. Simplicity of Von Neumann, but the useful features of
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OCR A-Level Computer Science evaluation te
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OCR A-Level Computer Science Evaluation Te
OCR A-Level Computer Science evaluation test guide well defined.
Contemporary Architecture - Answer Usually a combined selection of the 2 basic architectures' - taking the best of both worlds. Simplicity of Von Neumann, but the useful features of Harvard.
Input Device - Answer Any peripheral ...
OCR A-Level Computer Science
evaluation test guide well
defined.
Contemporary Architecture - Answer Usually a combined
selection of the 2 basic architectures' - taking the best of both
worlds. Simplicity of Von Neumann, but the useful features of
Harvard.
Input Device - Answer Any peripheral device that can accept
data, presented in the appropriate machine-readable form,
decode it and transmit it as electrical pulses to the CPU.
Output Device - Answer Any peripheral device that translates
signals from the computer into a human-readable form or into
a form suitable for reprocessing by the computer at a later
stage.
,Storage Device - Answer Any medium (optical, magnetic, solid
state and even paper which holds data or programs.
Magnetic Storage - Answer Storage medium which uses
surfaces coated with a layer of magnetic material on which data
can be stored by magnetically setting the arrangement of the
magnetic material. This is done by electromagnetic read/write
heads.
Flash Storage - Answer Collection of memory chips that is
controlled by its own software to make the collection of chips
act like a disk drive. Compact, large storage medium.
Optical Storage - Answer Storage medium that uses plastic discs
on which the data is stored as patterns on the surface in pits
and lans. Lightweight, compact, limited by data size.
Solid State Storage - Answer Storage medium for main disk
drive on a computer, is generally more expensive, therefore
less storage space, however is more reliable.
,Hard Disk Drive - Answer Storage medium for main disk drive
on computer, is generally cheaper, therefore more storage
space, however can be unreliable.
Random Access Memory (RAM) - Answer Volatile main
memory. Access times are very fast. Often referred to as Main
Memory, although this can be used in main areas of computing
and computing storage. When used as main memory this
typically can be thought of as containing the Operating System,
programs in use and the data those programs are using while
the computer is running.
Read Only Memory (ROM) - Answer Memory for which the
contents may be read by cannot be written to by the computer
system. Software in ROM is fixed during manufacturing. It
typically holds system boot up instructions. ROM is non-
volatile. More modern types of ROM can be written to in
limited ways, these include, PROM, EPROM and EAROM.
Virtual Memory - Answer A means of extending main storage
by using the hard drive as if it were quick-access memory.
Operating System is expected to utilise this by prioritising tasks.
, Virtual Storage - Answer 'The Cloud'. Reduces duplication, can
be accessed remotely but is less secure and is reliant on
bandwidth.
RAM Advantages - Answer Volatile so doesn't get clogged up,
large storage size, quick access.
RAM Disadvantages - Answer Volatile so data can't be stored,
expensive, if memory runs out computer crashes.
ROM Advantages - Answer Non-volatile so data can be stored,
can't be changed, quick access.
ROM Disadvantages - Answer Could get clogged up, Small
storage size.
Magnetic - Answer patterns of magnetisation represents 0 & 1,
this is read by a reader.
Optical - Answer marks and bumps on a medium, is read by a
light beam.
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