O-LevelComputer ScienceHardware2210/11 · May/June 2021 · Q212 Marks

Julia inputs personal data into her computer. She stores three copies of the data using a hard disk drive (HDD), a solid state drive (SSD) and a USB flash memory drive.

(a)Identify three devices Julia can use to input personal data into her computer. Device 1 Device 2 Device 3[3]
(b)Six statements are shown about HDDs, SSDs and USB flash memory drives. Tick (✔) to show which statements apply to each type of storage. Some statements can apply to more than one type of storage. Statement it has no moving parts it is non-volatile it can use NAND gates to store data it uses magnetic properties to store data it has the smallest physical size it has the slowest read/write speeds HDD (√) SSD (✔) USB flash memory drive (✔)[6]
(c)(i)One benefit of using a USB connection is that it is a universal connection. State two other benefits of using a USB connection. Benefit 1 Benefit 2[2]
(c)(ii)Identify the type of data transmission used in a USB connection.[1]

Mark scheme

Marking points from the official mark scheme (May/June 2021). The mark or mark type is shown in brackets.

[3] (a) Any three from: Keyboard Mouse Microphone Keypad Touchscreen Touchpad
[6] (b) One mark for each correct row. Statement HDD (✔) SSD (✔) USB flash memory drive (✔) it has no moving parts ✓ ✓ it is non-volatile ✓ ✓ ✓ it can use NAND gates to store data ✓ ✓ it uses magnetic properties to store data ✓ it has the smallest physical size ✓ it has the slowest read/write speeds ✓
[2] (c)(i) Any two from: It cannot be inserted incorrectly Supports different transmission speeds High speed transmission Automatically detected (not connected) // automatically downloads drivers Powers the device (for data transfer) Backward compatible
[1] (c)(ii) Serial

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