Describe the features of SISD and MIMD computer architectures. SISD MIMD

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2023). The mark or mark type is shown in brackets.

1. [1] One mark per mark point – SISD (Max 2)
2. [1] MP1 Single Instruction, Single Data (architecture). // Data is taken from a single source and a single instruction is performed on the data.
3. [1] MP2 Contains one processor, a control unit and a memory unit.
4. [1] MP3 ...that executes instructions sequentially.
5. [1] One mark per mark point – MIMD (Max 2)
6. [1] MP4 Multiple Instruction, Multiple Data (architecture). // At any time, any processor can execute different instructions on different sets of data.
7. [1] MP5 Contains many processors
8. [1] MP6 ...that operate asynchronously / independently.