Differentiate between hackers and spammers; state one importance of add-ins in MS Excel; explain cookies, plugins, and web crawlers.

Here are the answers to question 4:

a) Differentiate between hackers and spammers.

• A hacker is an individual who gains unauthorized access to computer systems or networks, often with malicious intent to steal data, disrupt services, or cause damage.
• A spammer is an individual or entity that sends unsolicited bulk messages, typically emails, to a large number of recipients, often for advertising or phishing purposes.

b) State one importance of add-in in MS Excel.

• Add-ins extend the functionality of MS Excel by providing new features, custom tools, or specialized calculations that are not available in the standard version.

c) Explain the following terms in computing:

(i) cookies:

• Cookies are small text files stored on a user's computer by a web browser. They are used to remember information about the user, such as login details, preferences, or items in a shopping cart, to personalize their web experience.

(ii) plugin:

• A plugin is a software component that adds a specific feature to an existing computer program. For example, a browser plugin might enable viewing of certain media types or enhance security.

(iii) web crawlers:

• Web crawlers (also known as spiders or bots) are automated programs used by search engines to systematically browse the World Wide Web. They read web pages and follow links to discover new content, which is then indexed for search results.