A student has a portable device. He uses an on-screen keyboard to write messages to his friend. (a) Explain how the text the student writes is converted to binary to be processed. \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ (b) The device has 4 gibibytes (GiB) of random access memory (RAM). (i) State the amount of RAM the device has in mebibytes (MiB). \_\_\_\_ [1] (ii) State the amount of RAM the device has in tebibytes (TiB). Your answer can be given rounded to 3 decimal places. \_\_\_\_ [1] Working space \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ (c) Explain why the portable device needs RAM. (d)The device has a fingerprint scanner to allow the student to unlock the portable device. Circle only three terms that can be used to describe the fingerprint scanner. | authentication | biometric | malware | parity check | | :--- | :--- | :--- | :--- | | firewall | input device | output device | storage device |

2025 - O/N - 0478/11 | Q3

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A student has a portable device. He uses an on-screen key...