A New IO Card Has Been Added to the Security

question 92

Multiple Choice

A new IO card has been added to the security server to log the opening and closing of the main entrance. A switch is attached, so the interface card returns a 1 when the door is opened and a 0 when the door is closed. Which of the following describes the Linux device to which this switch is attached?

• A) /dev/tty0
• B) /dev/port
• C) /dev/gpio
• D) /dev/sg0

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Definitions:

Abandonment Option

A form of real option in capital budgeting, giving a company the ability to abandon or terminate a project during its life if it becomes unprofitable.

Discount Rate

A rate of interest utilized within discounted cash flow evaluations to ascertain the present worth of forthcoming cash flows.

Decision Tree

A timeline representation used in planning projects subject to multiple outcomes. Wherever an event has several outcomes, the timeline branches into as many paths, each with a probability. The result is a proliferation of possible paths to completion, each representing an outcome, its financial implication, and its probability. Hence, the decision tree specifies a probability distribution for the project’s overall financial outcome.

NPV Profile

A graphical representation showing the relationship between the Net Present Value (NPV) of a project and various discount rates.