Theory question 104
InternetPaper 2, Section A: Short-structured questions
(a) Differentiate between hackers and spammers. (b) State one importance of add-in in MS Excel. (c) Explain the following terms in computing: (i) cookies; (ii) plugin; (iii) web crawlers.
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(a) A hacker breaks into computer systems or networks without permission, while a spammer sends large numbers of unwanted messages (spam) to many people.
(b) An add-in adds extra commands or features to Excel (e.g. Analysis ToolPak, Solver) for special tasks.
(c)(i) Cookies are small files a website stores on the user's computer to remember information such as login and preferences.
(ii) A plugin is a small program added to a larger application (e.g. a browser) to give it a new feature, such as playing video.
(iii) Web crawlers (spiders) are programs used by search engines to visit web pages automatically and index them.
Hackers break in; spammers flood inboxes.