One Type of CAPTCHA Is ________

question 118

Multiple Choice

One type of CAPTCHA is ________.

• A) antivirus software
• B) a password method
• C) the wavy hard-to-read letter and number sequence that you type to prove that you are human to a website
• D) a rootkit virus

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Definitions:

Butane

A gaseous hydrocarbon (C4H10) that is a constituent of natural gas and petroleum, used as a fuel and in the manufacture of organic compounds.

Propane

A flammable hydrocarbon gas used as a fuel for heating, cooking, and in some vehicles, also known as liquefied petroleum gas (LPG) when stored under pressure.

Natural Gas

A combustible hydrocarbon mainly made up of methane, utilized for generating heat, cooking food, and producing electricity.

Net Useful Energy Yield

The difference between the energy produced by a system and the energy consumed to create that energy, indicating the efficiency of energy production.