WAEC Computer Studies 2021 Theory — Question 5

Model answer

(i) USB (Universal Serial Bus) is the most popular hardware interface/connection standard used to connect a computer to devices such as digital cameras, printers, scanners, and external hard drives, among others. It is also used for charging portable devices and provides both data transmission and low-voltage power over a single cable. (ii) Any two: it can be used to charge devices; it supports fast data transfer; it provides low-voltage (5V) power through a single cable; no external power source is needed; it has low power consumption.