Unit 13: Data Representation
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13.1 User-defined data types
1 Show understanding of why user-defined types are necessary
2 Define and use non-composite types
3 Define and use composite data types
4 Choose and design an appropriate user-defined data type for a given problem
13.2 File organisation and access
1 Show understanding of the methods of file organisation and select an appropriate method of file organisation and file access for a given problem
2 Show understanding of methods of file access
3 Show understanding of hashing algorithms
13.3 Floating-point numbers, representation and manipulation
1 Describe the format of binary floating-point real numbers
2 Convert binary floating-point real numbers into denary and vice versa
3 Normalise floating-point numbers
4 Show understanding of the consequences of a binary representation only being an approximation to the real number it represents (in certain cases)
5 Show understanding that binary representations can give rise to rounding errors
13.1 User-defined data types
1 Show understanding of why user-defined types are necessary
2 Define and use non-composite types
3 Define and use composite data types
4 Choose and design an appropriate user-defined data type for a given problem
13.2 File organisation and access
1 Show understanding of the methods of file organisation and select an appropriate method of file organisation and file access for a given problem
2 Show understanding of methods of file access
3 Show understanding of hashing algorithms
13.3 Floating-point numbers, representation and manipulation
1 Describe the format of binary floating-point real numbers
2 Convert binary floating-point real numbers into denary and vice versa
3 Normalise floating-point numbers
4 Show understanding of the consequences of a binary representation only being an approximation to the real number it represents (in certain cases)
5 Show understanding that binary representations can give rise to rounding errors
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