Automation System
The program execution time:

must be slower than the fastest mechanical operation that is to be controlled
cannot be changed once the program is written
None of these
All of these
will vary depending on the language used

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Automation System
The program counter:

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

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

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

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Automation System
High-level languages:

require knowledge of the computer design
are "procedure-oriented"
cannot be used with automatic systems.
None of these
are very difficult to use

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