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Memory Management Questions

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Virtual memory size depends on


ADisc space

Bdata bus

Caddress lines

DNone of these

Answer: Option C

Explanation:

Here is no explanation for this answer

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Which of the following memories has the shortest access time?


ACache memory

BMagnetic bubble memory

CMagnetic core memory

DRAM

Answer: Option A

Explanation:

Here is no explanation for this answer

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Which of the following programming technique/structures are not good for demand paged environment?


AStack

BSequential search

CBinary Search

DVector operations

Answer: Option C

Explanation:

Here is no explanation for this answer

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For 1 MB memory, the number of address lines required,


A11

B16

C20

D24

Answer: Option C

Explanation:

Here is no explanation for this answer

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What page replacement algorithm has minimum number of page faults ?


Aframe-allocation algorithm

Boptimal page-replacement algorithm

CLRU page-replacement algorithm

DNone of these

Answer: Option B

Explanation:

Here is no explanation for this answer

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A byte addressable computer has memory capacity of 2 power m Kbytes and can perform 2 power n operations an instruction involving three operands and one operator needs maximum of___________ bits


A3m_n^2

B3m

C3m + n

DNone of the these

Answer: Option C

Explanation:

Here is no explanation for this answer

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A 12 address lines maps to the memory of


A1k bytes

B0.5k bytes

C2k bytes

DNone of these

Answer: Option B

Explanation:

Here is no explanation for this answer

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In which of the following page replacement policies, Balady's anomaly occurs?


AFIFO

BLRU

CLFU

DNRU

Answer: Option A

Explanation:

Here is no explanation for this answer

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Consider a machine with 64 MB physical memory and a 32-bit virtual address space. If the page size s 4KB, what is the approximate size of the page table?


A16 MB

B8 MB

C2 MB

D24 MB

Answer: Option C

Explanation:

Number of pages = 232 / 4KB = 220 as we need to map every possible virtual address.

So, we need 220 entries in the page table. Physical memory being 64 MB, a physical address must be 26 bits and a page (of size 4KB) address needs 26-12 = 14 address bits. So, each page table entry must be at least 14 bits.

So, total size of page table = 220 * 14 bits ~ 2 MB

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Which is not a memory management scheme?


Abuddy system

Bswapping

Cmonitors

Dpaging

Answer: Option C

Explanation:

Here is no explanation for this answer

Workspace

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