Discussion
A Central Processing Unit (CPU) contains
Answer: C
Correct answer: A control unit and an arithmetic/logic unit.
The CPU is conventionally described as those two parts. The control unit fetches, decodes and sequences instructions; the arithmetic and logic unit performs the calculations and comparisons.
Registers are usually counted with them, and modern processors add cache and several execution units, but the two-part description remains the standard model. Card readers and printers are peripherals, outside the processor entirely, and "analytical engine" is Babbage's term for a whole machine.
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