题目内容

The replacement policy that is impossible to implement because it would require the O/S to have perfect knowledge of future events is called the:

A. Optimal policy
B. Least recently used (LRU) policy
Clock policy
D. None of the answers

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A _______________ replacement policy chooses only among the resident ages of the process that generated the page fault in selecting a page to replace.

A. local
B. thrashing
C. disks
D. paging

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Each entry in a _______________ contains control bits and the corresponding frame number if the page is resident in memory.

A. page table
B. segment table
C. paging
D. demand paging

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A fundamental choice in the design of the memory-management portion of an O/S is: A: B: C: D:

All of the answers
B. Whether or not to use virtual memory techniques
C. Whether to use paging, segmentation of a combination of the two
D. The algorithms employed for various aspects of memory management

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The type of memory that allows for very effective multiprogramming and relieves the user of memory size constraints is referred to as:A: B: C: D:

A. Virtual memory
B. Real memory
C. Main memory
D. All of the above

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The replacement policy that is impossible to implement because it would require the O/S to have perfect knowledge of future events is called the:

A. Optimal policy B. Least recently used (LRU) policy Clock policy D. None of the answers

A _______________ replacement policy chooses only among the resident ages of the process that generated the page fault in selecting a page to replace.

Each entry in a _______________ contains control bits and the corresponding frame number if the page is resident in memory.

A fundamental choice in the design of the memory-management portion of an O/S is: A: B: C: D:

The type of memory that allows for very effective multiprogramming and relieves the user of memory size constraints is referred to as:A: B: C: D:

A. Optimal policy
B. Least recently used (LRU) policy
Clock policy
D. None of the answers