Which of the Following Is a Real-Time Internet Communications Service

question 23

Multiple Choice

Which of the following is a real-time Internet communications service that notifies users when one or more people are online and then allows them to exchange messages or files or join a private chat room?

• A) Wikispace
• B) IM
• C) Chattalk
• D) Communispace

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Definitions:

AVC (Average Variable Cost)

The cost of labor, materials, and other variable expenses divided by the quantity of output produced, excluding fixed costs.

AFC (Average Fixed Cost)

The fixed costs (expenses that do not change with the level of production) divided by the quantity of goods or services produced, typically decreasing as production increases.

Marginal Cost

The cost increase that comes with producing an additional unit of a product or service.

Marginal Revenue

The heightened income realized from the sale of one more unit of a good or service.