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NIMCET Previous Year Questions (PYQs)

NIMCET Organization Of A Computer PYQ

NIMCET PYQ
The time required for fetching and execution of one simple machine instruction is known as





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Solution

NIMCET PYQ
Consider the program below which uses six temporary variables a, b, c, d, e, and f.
a = 10
b = 20
c = 30
d=a+c
f=c+c
b=c+e
e=b+f
d=5+e
return d+f

Assuming that all the above operations take their operands from registers, the minimum number of registers needed to execute this program without spilling is

 Assuming that all the above operations take their operands from registers, the minimum number of registers needed to execute this program without spilling is





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Solution

Detailed Register Allocation Analysis

Objective: Determine the minimum number of registers needed to execute the program without spilling.

Live Range Analysis:

  • a: Line 1 → 4
  • b: Line 6 → 7
  • c: Line 3 → 6
  • d: Line 8 → 9
  • e: Line 7 → 8
  • f: Line 5 → 9

Max live variables: 3 (after lines 6 and 7)

✅ Final Answer: 3 registers are required to execute the program without spilling.

NIMCET PYQ
Which of the following components is not a part of an instruction formation in CPU processing?





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Solution

Instruction Formation in CPU Processing

Question: Which of the following is not a part of instruction formation?

Options:

  • Opcode
  • Register file
  • Source operand
  • Destination operand

✅ Correct Answer: Register File

Explanation:

  • Opcode, Source operand, Destination operand — all are part of the instruction format.
  • Register File — a hardware structure that stores registers, but it is not encoded into the instruction.

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