When the Command Echo $ Outputs 1, Which of the Following

question 206

Multiple Choice

When the command echo $ outputs 1, which of the following statements is true?

• A) It is the process ID of the echo command.
• B) It is the process ID of the current shell.
• C) It is the exit value of the command executed immediately before echo.
• D) It is the exit value of the echo command.

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Definitions:

Private Good

A product or service that is excludable and rival in consumption, meaning its use by one individual prevents its use by another.

Public Good

Refers to commodities or services that provide benefits to all members of society and whose use by one individual does not diminish the availability to others.

Public Good

Goods that once provided to one consumer, can be accessed by others without additional costs, benefiting the entire community.

Free-rider Problem

A situation where individuals consume a good without paying for it, benefiting from the good or service without contributing to its cost.