Automation System
Resolution in a CRT refers to:

the number of addressable elements on the tube
the number of phosphor dots that react when hit by the electron beam
the speed at which the monitor can accept data from the computer
None of these
the number of pixels in each square centimeter

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Automation System
Digital signals:

have a frequency measured in units of hertz
are assigned values of 1 or 0 depending on the voltage level
can have three possible levels
have a sinusoidal shape.
None of these

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