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

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

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Automation System
If the transient response is under damped:

both a and b
steady-state will be reached faster than if the system is overdamped
None of these
the present overshoot is zero
the value of the output will exceed the value of the input at times during the transient period

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