5.1 Data Structures and File Design: revision quiz and key terms
Free practice for 5.1 Data Structures and File Design in WJEC Eduqas GCSE Computer Science. Try the questions, then check the key terms.
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In a record structure, what is a field?
A two-dimensional array can be thought of as a grid, accessed by row and column.
An array is declared as names = ["Ali", "Ben", "Cara", "Dev"]. If indexing starts at 0, what is stored in names[2]?
A record can only store fields that all have the same data type.
What is an advantage of fixed-length records compared with variable-length records?
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Key terms for 5.1 Data Structures and File Design
- Array
- Stores a fixed-size collection of elements, each accessed using an index.
- Data structure
- A way of organising and storing data so that it can be accessed and used efficiently.
- Field
- A single item of data within a record, such as a name or date of birth.
- File
- A collection of related data stored together under a single name.
- Record
- Groups together related items of data, which may be of different types.
- Sequential file
- Stores records in order of a key field, such as a customer number.
- Serial file
- Stores records in the order in which they were added.
- Two-dimensional array
- An array whose elements are arranged in rows and columns and accessed using two indexes.
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