Answer:
a source and a target.
Explanation:
In computer science and information theory, data differencing or differential compression is producing a technical description of the difference between two sets of data – a source and a target.
No. social media makes people share too much information about their personal lives.
Out of the following, the only one that I see is not the basic role of a webmaster is replying to customers questions about the web site! Usually they have a specific job for that; like customer service etc. Hopefully that helps.
