NIMCET 2012 — Computer PYQ

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Question

NIMCET 2012 — Computer PYQ

NIMCET | Computer | 2012

Which of the following units is used to supervise each instruction in the CPU?

Choose the correct answer:

Explanation

The correct answer is (a) Control unit.

Logic:

The Central Processing Unit (CPU) consists of various components that manage the Fetch-Decode-Execute cycle. The Control Unit (CU) acts as the manager of the processor.

We can represent the functional components of a CPU as a set $C$ :

C = \{CU, ALU, Registers\}

The supervision and coordination of data flow can be modeled by the control signals $S$ generated by the Control Unit for any instruction $i$ :

CU(i) \rightarrow S_{control}

Where $S_{control}$ directs the Arithmetic Logic Unit (ALU) and memory units on how to respond to the instruction. Since it "supervises" or coordinates all activities, the Control Unit is the correct choice.