Data Representation

Worked examples (6)

• 1Define and use an enumerated type
• 2Define and use a pointer type
• 3Define and use a set type
• 4Define and use a record type
• 5Define a class and create an object
• 6Choose the right user-defined type for a problem

Model answers (6)

• ✓Model answer — 9618 Paper 3 style
• ✓Model answer — 9618 Paper 3 style
• ✓Model answer — 9618 Paper 3 style
• ✓Model answer — 9618 Paper 3 style
• ✓Model answer — 9618 Paper 3 style
• ✓Model answer — 9618 Paper 3 style

Worked examples (6)

• 1Choosing an organisation method for an arriving stream of records
• 2Naming the access method for each file type
• 3Serial vs sequential vs random for three requirements
• 4Applying a hashing algorithm (key MOD table size)
• 5Handling a collision with open addressing
• 6Hashing with an overflow area

Model answers (6)

• ✓Model answer — 9618 Paper 3 style
• ✓Model answer — 9618 Paper 3 style
• ✓Model answer — 9618 Paper 3 style
• ✓Model answer — 9618 Paper 3 style
• ✓Model answer — 9618 Paper 3 style
• ✓Model answer — 9618 Paper 3 style

Worked examples (6)

• 1Convert a floating-point number to denary
• 2A negative mantissa to denary
• 3Normalise a positive floating-point number
• 4Normalise a negative floating-point number
• 5Convert denary to normalised floating-point
• 6Bit allocation, range and a rounding error

Model answers (6)

• ✓Model answer — 9618 Paper 3 style
• ✓Model answer — 9618 Paper 3 style
• ✓Model answer — 9618 Paper 3 style
• ✓Model answer — 9618 Paper 3 style
• ✓Model answer — 9618 Paper 3 style
• ✓Model answer — 9618 Paper 3 style