Automation System
A flip-flop:

None of these
is a combinational logic device
(a) and (c)
is a sequential logic device
remembers what was previously stored in it

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Automation System
The "walk-through" method of programming a robot involves:

All of these
physically moving the robot through all the motions it is to repeat
moving the robot from one location to another
walking through your suggested procedure with your supervisor prior to programming
None of these

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Automation System
Digital signals:

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

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