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Data Representation
Data Representation
Describe and exemplify the use of binary to represent positive integers.
Describe and exemplify the use of binary to represent positive integers.
Convert from binary to denary and vice-versa.
Convert from binary to denary and vice-versa.
Describe floating point representation of positive real numbers using the terms mantissa and exponent.
Describe floating point representation of positive real numbers using the terms mantissa and exponent.
Describe extended ASCII code (8-bit) used to represent characters.
Describe extended ASCII code (8-bit) used to represent characters.
Describe the vector graphics method of graphic representation for common objects: rectangle, ellipse, line, polygon with attributes: co-ordinates, fill colour, line colour
Describe the vector graphics method of graphic representation for common objects: rectangle, ellipse, line, polygon with attributes: co-ordinates, fill colour, line colour
Describe the bit-mapped method of graphics representation.
Describe the bit-mapped method of graphics representation.
Computer Structure
Computer Structure
Describe the purpose of the basic computer architecture components and how they are linked together: processor (registers, ALU, control unit), memory locations with unique addresses, buses (data and address)
Describe the purpose of the basic computer architecture components and how they are linked together: processor (registers, ALU, control unit), memory locations with unique addresses, buses (data and address)
Explain the need for interpreters and compilers to translate high level program code to binary (machine code instructions).
Explain the need for interpreters and compilers to translate high level program code to binary (machine code instructions).
Environmental Impact
Environmental Impact
Describe the energy use of computer systems, the implications on the environment and how these could be reduced through: settings on monitors, power down settings, leaving computers on standby.
Describe the energy use of computer systems, the implications on the environment and how these could be reduced through: settings on monitors, power down settings, leaving computers on standby.
Security Precautions
Security Precautions
Describe the role of firewalls.
Describe the role of firewalls.
Describe the use made of encryption in electronic communications.
Describe the use made of encryption in electronic communications.
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