Feedback+and+mark+schemes+from+January+exams

Q1: MP3 Player q1

q2 Megbits and Megabytes from WiseGeek To put megabits and [|Megabytes] in perspective, lets back up for just a moment. One bit of data is a single “on” or “off” digit, a one or zero. It takes eight bits to represent a single character, or one byte of data.
 * MBps** is an abbreviation for //Megabytes per second//, whereas **mbps** and **Mbps** are abbreviations for //megabits per second//. Eight megabits equal one Megabyte. These abbreviations are commonly used to specify how much data can be transferred per second between two points.

As a point of possible confusion it should be mentioned that there are two different systems for calculating multiples of data: the decimal system as noted above, and the [|binary] system. According to the binary system, used in relation to computer storage and memory, it takes not 1000 bytes to equal a KB, but 1024 bytes. This is because 24 extra bytes are used to store indexing or mapping information about the 1000 bytes of data. Technically, the designations in this case are Kibibyte (KiB) and Mebibyte (MiB), but these haven’t caught on in the public sector, leading many uses of “MB” to mean 1024 kilobytes, and others to mean 1000 kilobytes. When considering [|MBps] or mbps, however, the decimal system applies, as the reference is to data transfer rates and not [|data storage].
 * 8 bits = 1 byte
 * 1000 bytes = 8 kilobits (kb) = 1 Kilobyte (KB)
 * 1000 Kilobytes (KB) = 8 megabits (mb) = 1 Megabyte (MB)

=PAPER 2= Criterion A Criterion B Criterion C Criterion D
 * Social/ethical issue: Privacy, Digital citizenship
 * Students - uploading media, Teachers - cannot delete online material they do not control
 * Description of IT system: How to capture video and upload it to a social networking site, transfer rate, video compression or conversion, how is the video viewed once uploaded?
 * Relationship between IT system and social/ethical concern in A: eg explain the relationship between privacy and social networking