4847469
Mind Map by Chris Hulme, updated more than 1 year ago
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Created by Chris Hulme
about 4 years ago
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Description
Higher Computing Science
1 Languages and environments
1.1 Low-Level
1.1.1 Corresponds directly to a processor's instruction set
1.2 High-Level
1.2.1 Written in English
1.3 Procedural
1.3.1 Uses procedures, functions or sub-routines.
1.3.2 Visual Basic
1.4 Declarative
1.4.1 Uses facts, rules and queries to interrogate the knowledge base
1.4.2 {"item": "bread", "type": "wheat"}
1.5 Object-Orientated
1.5.1 Uses classes
2 Parameters
2.1
2.1.1 Formal - this refers to the variable name
used within the subroutine to hold the
data passed into it, for example, age.
2.1.2 Actual - this refers to the actual
data that is passed into the
subroutine, for example, 45.
2.2
2.2.1 Global - these
variables can be
used throughout a
program at any
point in the code
2.2.2 Local - the values stored in
these variables exist within
only one part of the code,
usually within a subroutine
3 Methods of Testing
3.1 Dry Run - reading the
code and predicting
what will happen
without actually
running the code.
3.2 Trace Table - lists the
variables in a program
and tracks the values
they store as the code is
executed store as the
code is executed.
3.3 Test Plan
3.3.1 Normal, Extreme, Exceptional
3.4 Beta Testing - final stage of
testing involving community
4 Software Development Methodologies
4.1 Rapid Application Development
4.1.1 Involves building prototypes
of parts of the software
4.1.1.1 Easier to test
4.1.1.2 Feedback early on
4.2 Agile Methodologies
4.2.1 Lack of emphasis on
design and documentation
5 Legal
Implications
5.1 Computer Misuse Act
5.1.1 Unauthorised access
of a computer
5.1.2 Unauthorised access of a computer
to commit further criminal offences
5.1.3 Unauthorised
altering of
computer data
5.2 Copyright, Designs
and Patents Act
5.2.1 Protect time, money and effort
invested by content creators.
5.3 The Communications ACt
5.3.1 Use other people's Wi-Fi broadband
connections without permission
5.3.2 Offensive / upsetting
messaging
5.3.3 Unauthorised interception of
communications (e.g. phone hacking)
5.4 Regulation of Investigatory
Powers Act (RIPA)
5.4.1 Certain organisations can intercept data, access password protected data
and carry out surveillance for the purposes of crime prevention.
5.4.2 Protects individuals'
rights to privacy
5.4.3 The employers must notify
employees if they want to
intercept communications data
6 Processor Buses
6.1 Data Bus
6.1.1 Transfer data between main
memory and the processor.
6.1.2 Two-way
6.2 Address Bus
6.2.1 Specify the address of
the memory location
6.2.2 One-way
6.3 Control Bus
6.3.1 Read - Reads the contents of a memory location
6.3.2 Write - Writes an item of data from the
processor into a memory location
6.3.3 Clock - sends a regular series of pulses
into the processor to synchronise events.
6.3.4 Reset - stop execution of current
program and then to reboot
6.3.5 Interrupt - peripheral devices, such as printers,
can send a signal on the interrupt line into the
processor when the require attention. This
causes the processor to deal with the
interrupting device.
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