Q. Virtual memory is __________.

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Q. The principle of locality of reference justifies the use of ________.

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Q. In a virtual memory environment

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Q. The mechanism that bring a page into memory only when it is needed is called _____________

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Q. Demand paged memory allocation

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Q. What is a page fault ?

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Q. Dirty bit is used to show

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Q. Size of virtual memory depends on

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Q. A program is executing in a pure demand paging system with 100 records per page with 1 free main memory frame. The address sequence that is generated by tracing this program is recorded as follows,
0100, 0200, 0430, 0499, 0510, 0530, 0560, 0120, 0220, 0240, 0260, 0320, 0370
What are the number of page faults?

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Q. If hardware does not support _________ then a multi - user and multi - processing operating system cannot be implemented.

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Q. Consider a virtual memory system that uses First In First Out (FIFO) page replacement policy and it allocates a fixed number of frames to a process. Consider the following two statements,

1: Sometimes the page fault rate is increased if the number of page frames allocated is increased.
2: Some programs do not exhibit Locality of reference.

Which of the following is true?

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Q. Why do we translate a virtual address to physical address where a multilevel page table is preferred in comparison to a single level page table?

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Q. What is the impact of thrashing?

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Q. Memory utilization factor shall be computed as follows

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Q. Which of the following is not a key piece of information, stored in single page table entry, assuming pure paging and virtual memory

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Q. A set of techniques that allow to execute a program which is not entirely in memory is called

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Q. Page fault frequency in an operating system is reduced when the

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Q. Virtual memory can be implemented with

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Q. A process that execute only in main memory is referred to as ……………… and that allocated in disk is referred to a …………….

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Q. Thrashing

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