Automation System
The axis of movement of a robot may include:

elbow rotation
Wrist rotation
All of these
None of these
X-Y coordinate motion

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Automation System
D/A (digital to analog) conversion:

results in a binary code as the final output
has to be sampled at 1/2 the highest input frequency
None of these
must be fed through a filter to reproduce the original signal accurately
both (b) and (c)

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