What is a possible downside of a "free" Web-hosting service?
What will be an ideal response?
Nothing is truly free. Most free Web-hosting services make their money on ads that they add to your Web pages. The better ones have simple, honest ads, while some use annoying pop-up ads all over your Web pages.
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Which of the following is not true about how companies use Twitter to help generate business?
A) Blizzard's Twitter feed informs users of game outages and problems. B) Twitter can be used to help consumers feel like they have a personal connection to a company. C) Companies such as Starbucks have Twitter accounts and respond to customers as if they are just another friend. D) Any company with a Twitter account will pay users to tweet an advertisement for them.
Referential integrity should be enforced in a database with related tables because it:
A) helps ensure data is automatically updated. B) makes the database easier to repair. C) creates a primary key in every table of a database. D) helps ensure invalid data is not entered into a table.