Computer Science · May / June 2016 · Paper 11 · Question 4

serial [1]

Any three from:

– automatically detects the hardware/installs drivers – plug only goes in one way/can’t connect incorrectly – supports different data transmission speeds/a range of data transmission speeds – has become the industry standard/universally used – backwards compatible (with earlier versions of USB ports) [3]

interrupt [1]

1 mark each use of printer, max 1 mark per printer. inkjet printer – (small quantities of) documents – photographs 3D printer – (physical) prototype (from CAD) – (physical) model (from a blueprint) [2]

1 mark for naming printer + 1 mark for description + 1 mark for application Laser printer – uses toner/powder ink – uses (positive and negative) charged drums // rotating drum – uses static charge – no moving head – faster at printing – high volume output/high speed – producing flyers/leaflets/magazines [3]

This is an example, other types of printers can be credited.