Automation System
The program counter:

contains the address of the next instruction to be executed
is where arithmetic is done in a computer.
decides which program to run
None of these
counts the number of instructions that have been executed

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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
None of these
results in a binary code as the final output

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