Computers use secondary storage.
Describe the role of secondary storage.
Mark scheme
Award up to two marks for a linked description such as:
- Stores programs (including the operating system) and data that are not currently in use (1) so that they can be loaded into RAM/main memory when needed (1)
- Keeps files/programs/data when the power is turned off (1) which happens because it is non-volatile (1)
- Stores files/data for backup or archiving (1) so that they can be recovered if the originals are lost/corrupted (1)
A correct role on its own earns one mark; the second mark requires a linked development.
Accept either order if both the role and the link are given.
Do not accept 'it is non-volatile' on its own, unless it is linked to keeping data when the power is turned off.
Do not accept answers that only name a storage type (magnetic, optical, solid state) without describing a role.
Do not accept responses that describe primary storage/RAM, e.g. storing the data/instructions the CPU is currently working on, or that secondary storage makes the computer run faster.
Example answers and how they were marked
Secondary storage stores programs and data that are not currently in use so that they can be loaded into RAM when they are needed.
Why: Role point (1) linked to loading into RAM when needed (1).
It stores files and programs that are not currently in use.
Why: Correct role on its own earns one mark (1); no linked development, so the second mark is not awarded.
It holds the data and instructions the CPU is working on so the computer runs faster.
Why: Describes primary storage/RAM and a speed benefit, which the mark scheme does not accept; no role of secondary storage is given.