An IT department is choosing secondary storage media for archiving files. Identify the physical feature of a magnetic hard disk platter that allows binary data to be stored and read.
It uses trapped electrons in floating gates
It is highly reflective to easily scatter laser beams
It is volatile and requires continuous power to maintain state
It contains microscopic magnetised regions on its surface
76 exam-style questions on Edexcel GCSE Computer Science Hardware, covering Von Neumann architecture and FDE cycle, Secondary storage devices, and Embedded systems. Each one has a worked solution and a mark scheme showing where the marks go.