Ch 13 · File Organisation & Access (A Level) · Theory
Topic 13 of 14 in Data Representation — How Computers Store Everything as Numbers — 3 lessons.
Records, Fields & Files
Before organising files, know the vocabulary. A field is one item (a name); a record is a collection of fields about one thing (a whole customer); a file is a set of records. A user-defined data type (like a record/struct) lets you bundle fields of different types into one custom type.
File Organisation
The organisation is the order records are physically stored in:
File Access & Hashing
The access method is how you retrieve a record:
All topics in Theory Data-representation
- Why Computers Use Binary
- Counting in Binary
- Hexadecimal — Shorthand for Binary
- Binary Addition & Overflow
- Negative Numbers — Two's Complement
- Logical Binary Shifts
- Representing Text
- Representing Images
- Representing Sound
- Storage Units & Compression
- Floating-Point Numbers (A Level)
- More Number Representations
- File Organisation & Access (A Level)
- Check Your Understanding