GATE CSE 2014 Set 2 | Memory Management Question 24 | Operating Systems

GATE CSE 2014 Set 2

MCQ (Single Correct Answer)

-0.6

A computer has twenty physical page frames which contain pages numbered $$101$$ through $$120.$$ Now a program accesses the pages numbered $$1, 2, …, 100$$ in that order, and repeats the access sequence THRICE. Which one of the following page replacement policies experiences the same number of page faults as the optimal page replacement policy for this program?

Least-recently-used

First-In-First-Out

Least-in-first-out

None

GATE CSE 2014 Set 1

Numerical

-0

Assume that there are $$3$$ page frames which are initially empty. If the page reference string is $$1, 2, 3, 4, 2, 1, 5, 3, 2, 4, 6,$$ the number of page faults using the optimal replacement policy is______________.

Your input ____

GATE CSE 2012

MCQ (Single Correct Answer)

-0.6

Consider the virtual page reference string $$$1,2,3,2,4,1,3,2,4,1$$$
On a demand paged virtual memory system running on a computer system that has main memory size of $$3$$ page frames which are initially empty. Let $$LRU,$$ $$FIFO$$ and $$OPTIMAL$$ denote the number of page faults under the corresponding page replacement policy. Then

$$OPTIMAL < LRU < FIFO$$

$$OPTIMAL < FIFO < LRU$$

$$OPTIMAL = LRU$$

$$OPTIMAL = FIFO$$

GATE CSE 2009

MCQ (Single Correct Answer)

-0.6

A multilevel page table is preferred in comparison to a single level page table for translating virtual address to physical address because.

It reduces the memory access time to read or write a memory location.

It helps to reduce the size of page table needed to implement the virtual address space of a process.

It is required by the translation look aside buffer.

It helps to reduce the number of page faults in page replacement algorithms.