A library has a system that allows customers to check out the books that they want to borrow.Each book has a barcode that can be used to identify the book. (a) (i) Identify two input devices that may be used in the library's system. Input device 1 \_\_\_\_ Input device 2 \_\_\_\_ [2] (ii) Identify two storage devices that may be used in the library's system. Storage device 1 \_\_\_\_ Storage device 2 \_\_\_\_ [2] (iii) Identify two output devices that may be used in the library's system. Output device 1 \_\_\_\_ Output device 2 \_\_\_\_ [2] (b) The data stored by the library is archived at the end of each day. The archive is held on a server in the library office. The data is encrypted with an 8-bit key. As some of the data is confidential, the library wants to make the encryption more secure. (i) State how the library could make the encryption more secure. \_\_\_\_ \_\_\_\_ [1] (ii) The term used to describe data before it is encrypted is plain text. State the term used to describe encrypted data. \_\_\_\_ [1] (iii) The library's archive system uses an error detection and correction system that combines a parity check with an automatic repeat request (ARQ). Describe how this system uses the parity check and ARQ. \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ [6] (c) The library has a website that customers can use to search for a book. (i)The website has a background colour with the hexadecimal colour code \#F92A10 The colour code is stored in two 12-bit binary registers. Show how the colour code would be stored in the registers. F92 | | | | | | | | | | | | | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | A10 | | | | | | | | | | | | | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | (ii) Videos on the library website show customers which books the library will soon have in stock. The library wants the file size of a video to be as small as possible. Identify and describe a method the library could use to reduce the file size of a video as much as possible. \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ [4] (d) The library often holds events that introduce new authors. At the events, the library has a Liquid Crystal Display (LCD) screen that displays data, including an image and information about the author. Describe how an LCD screen operates to display this data. \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ \_\_\_\_ [5]

2019 - O/N - 0478/13 | Q1

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A library has a system that allows customers to check out...