In a computer if the page fault service time is 10 ms and average memory access time is 30 ns. If one page fault is generated for every 106 memory accesses. What is the effective access time for the memory?

30 ns approximate Explanation: Data Given: Memory Access Time (MA): Page Fault Service Time (PFST): Page Fault Rate (P): Equation Solution: Approximation (As per options): Chunkee ( ) ek bahut choti value hai, isliye: Answer: 30 ns (Approximate)

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CUET PG 2024 Computer PYQ — In a computer if the page fault service time is 10 ms and average… | Mathem Solvex

A.
21 ns approximate
B.
25 ns approximate
C.
30 ns approximate
(Correct Answer)
D.
40 ns approximate

Correct Answer:

30 ns approximate

Explanation

Data Given:

Memory Access Time (MA): $30\text{ ns}$
Page Fault Service Time (PFST): $10\text{ ms} = 10^7\text{ ns}$
Page Fault Rate (P): $1/10^6$

Equation Solution:

\text{EAT} = (1 - P) \times \text{MA} + P \times \text{PFST}

\text{EAT} = \left(1 - \frac{1}{10^6}\right) \times 30 + \left(\frac{1}{10^6}\right) \times 10^7

\text{EAT} = 29.99997 + 10

\text{EAT} = 39.99997\text{ ns}

Approximation (As per options):

Chunkee $P$ ( $10^{-6}$ ) ek bahut choti value hai, isliye:

\text{EAT} \approx \text{MA}

\mathbf{\text{EAT} \approx 30\text{ ns}}

Answer: 30 ns (Approximate)

CUET PG 2024 — Computer PYQ

Choose the correct answer:

Explanation

Data Given:

Equation Solution:

Approximation (As per options):

Explanation

Data Given:

Equation Solution:

Approximation (As per options):