Automation System
Four basic elements are required for an automated machine tool or production process. They are: input interface, memory, output interface and:

None of these
NC tape programming
software
computer graphics workstation
logic

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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
must be fed through a filter to reproduce the original signal accurately
None of these
both (b) and (c)

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