Automation System
The device that assembles groups of characters into complete messages prior to their entering the CPU is called:

None of these
a compiler
a communications processor
an interpreter
an editor

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Automation System
One of the major benefits of using CAD in tool design is that:

it simplifies the trial-and-error method
None of these
product design represents approximately one-half the engineering costs
tool motions can be checked to see if there is interference between the tool and the object
there is better coordination in the materials-handling area

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Automation System
Digital signals:

have a sinusoidal shape.
None of these
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

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