Q. We have a process that has been allocated 3 page frames and initially none of the pages of the process are available in the memory. The following sequence of page references (reference string) is made by the process :
1, 2, 1, 3, 7, 4, 5, 6, 3, 1
How many page faults will occur for the above reference string with the Least Recently Used(LRU) Page Replacement Policy in comparison to an Optimal Page Replacement policy?

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Q. We have a process that has been allocated 3 page frames and initially none of the pages of the process are available in the memory. The following sequence of page references (reference string) is made by the process :
1, 2, 1, 3, 7, 4, 5, 6, 3, 1
If Optimal Page Replacement policy is used, _______ page faults will occur for the above reference string.

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Q. What is page cannibalizing?

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Q. ‘LRU’ page replacement policy is

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Q. Which amongst the following is not a valid page replacement policy ?

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Q. Page stealing

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Q. Recall that Belady’s anomaly is that the pages-fault rate may increase as the number of allocated frames increases. Now consider the following statements:
S1: Random page replacement algorithm (where
a page chosen at random is replaced)
suffers from Belady’s anomaly.

S2: LRU page replacement algorithm suffers
from Belady’s anomaly .
Which of the following is CORRECT?

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Q. The ……………. Determines when a page should be brought into main memory.

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Q. With …………………. A page is written out to secondary memory only when it has been selected for replacement.

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Q. Which of the following statements is false ?

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Q. Thrashing can be avoided if

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Q. Fragmentation of the file system

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Q. The memory allocation scheme subject to "external" fragmentation is

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Q. Which of the following statements is false?

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Q. If the number of bits in a virtual address of a program is 16 and the page size is 0.5 K bytes, the number of pages in the virtual address space is

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Q. In which of the storage placement strategies a program is placed in the largest available hole in the main memory?

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Q. The problem of thrashing is affected significantly by:

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Q. In which of the storage placement strategies a program is placed in the smallest available hole in the main memory?

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Q. Which policy replace a page if it is not in the favoured subset of a process's pages?

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Q. The function(s) performed by the paging software is (are)

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