An Attribute That Appears as a Nonkey Attribute in One

question 303

Multiple Choice

An attribute that appears as a nonkey attribute in one relation and as a primary key attribute (or part of a primary key) in another relation is a:

• A) foreign key.
• B) candidate key.
• C) pointer.
• D) relationship key.
• E) marker.

Understand how signals are maintained and boosted in long-distance network communications.

Understand the concept and benefits of scenario planning.

Differentiate between qualitative and quantitative forecasting methods.

Comprehend the principles and applications of zero-based and contingency budgeting.

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Definitions:

True Power

The actual power consumed by a device in an electrical circuit, measured in watts (W), and calculated as the product of voltage, current, and the cosine of the phase angle between them.

Three-Phase Circuit

An electrical distribution system consisting of three alternating currents of the same frequency, which reach their peak values at different times.

Power Factor

The ratio of real power flowing to the load to the apparent power in the circuit, reflecting how effectively electrical power is converted into useful work output.

Apparent Power

The total power in an AC circuit, represented as the product of the circuit's voltage and current, without taking phase difference into account.