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

1 mark for each correct row Single track Many concentric tracks Blue laser used to read/ write data Red laser used to read/ write data DVD-RW ✓ ✓ 1 mark DVD-RAM ✓ ✓ 1 mark CD-ROM ✓ ✓ 1 mark Blu-ray disc ✓ ✓ 1 mark [4]

Any three from:

– don’t need to “get up to speed” to work properly/no latency – lower/less power consumption/more energy efficient – run cooler – run quieter – data access is faster – occupies less physical space/more compact – lighter, so more suitable for a portable computer/laptop – no moving parts so more reliable/durable in a portable computer/laptop [3]

Any two from:

– HDD is cheaper for larger amounts of storage space – HDD has greater longevity for read/write functions – Expensive to change the technology // HDD are trusted technology – No requirement for the increased speed of SSD [2]