Podcast
Questions and Answers
Page replacement becomes necessary when a page fault occurs and there are free page frames in memory.
Page replacement becomes necessary when a page fault occurs and there are free page frames in memory.
False (B)
The optimal page replacement algorithm replaces a page that will be needed for the longest period of time in the future.
The optimal page replacement algorithm replaces a page that will be needed for the longest period of time in the future.
False (B)
The first-in-first-out (FIFO) page replacement algorithm selects the most recently used page for removal.
The first-in-first-out (FIFO) page replacement algorithm selects the most recently used page for removal.
False (B)
Page replacement is only necessary when a new page comes in and there are free page frames in memory.
Page replacement is only necessary when a new page comes in and there are free page frames in memory.
The least recently used (LRU) page replacement algorithm replaces a page that is most likely to be referenced in the immediate future.
The least recently used (LRU) page replacement algorithm replaces a page that is most likely to be referenced in the immediate future.
Page replacement algorithms are only needed when a page fault occurs and the replaced page is referenced again.
Page replacement algorithms are only needed when a page fault occurs and the replaced page is referenced again.
Virtual memory is a technique used to manage physical memory more efficiently.
Virtual memory is a technique used to manage physical memory more efficiently.
Demand paging is a technique used to load entire programs into memory at once.
Demand paging is a technique used to load entire programs into memory at once.
Copy on write is a technique used to manage page faults in virtual memory.
Copy on write is a technique used to manage page faults in virtual memory.
Page replacement is a mechanism used to manage physical memory.
Page replacement is a mechanism used to manage physical memory.
Virtual memory allows programs to run as if they have access to a small, continuous block of memory.
Virtual memory allows programs to run as if they have access to a small, continuous block of memory.
Demand paging is based on the principle of loading entire programs into memory at once.
Demand paging is based on the principle of loading entire programs into memory at once.
In the MRU algorithm, the page that will be replaced is the one that has been used least recently.
In the MRU algorithm, the page that will be replaced is the one that has been used least recently.
Belady's anomaly can occur in the MRU algorithm.
Belady's anomaly can occur in the MRU algorithm.
Thrashing occurs when the system has an excess of physical memory.
Thrashing occurs when the system has an excess of physical memory.
Thrashing is a desirable scenario in operating systems because it improves system performance.
Thrashing is a desirable scenario in operating systems because it improves system performance.
Thrashing occurs when the system is under a light workload.
Thrashing occurs when the system is under a light workload.
Flashcards
Optimal Page Replacement Algorithm
Optimal Page Replacement Algorithm
Replaces the page that won't be used for the longest time in the future.
FIFO Page Replacement
FIFO Page Replacement
Replaces the page that entered memory first. (First-In, First-Out)
LRU Page Replacement
LRU Page Replacement
Replaces the page that hasn't been used for the longest time.
Demand Paging
Demand Paging
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Virtual Memory
Virtual Memory
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Belady's Anomaly
Belady's Anomaly
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Thrashing
Thrashing
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Page Replacement
Page Replacement
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When is Page Replacement needed
When is Page Replacement needed
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MRU Page Replacement
MRU Page Replacement
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Copy-on-write
Copy-on-write
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Virtual Memory's Function
Virtual Memory's Function
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Page Fault
Page Fault
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