Page based virtual memory ensures that every process has its own address space. It allows processes
access up to 2^(system bits) bytes of address space, and allows programs requiring more RAM to use
only what it needs to at any one point. Physical memory need not be contiguous. No external
fragmentation. Minimal internal fragmentation. Allows sharing (you can map several pages to the same
frame).
Titany answered the question on April 26, 2022 at 12:04
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Describe page-based virtual memory. You should consider pages, frames, page
tables, and Memory Management Units in your answer
(Solved)
Describe page-based virtual memory. You should consider pages, frames, page
tables, and Memory Management Units in your answer
Date posted:
April 26, 2022
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Answers (1)
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Base-limit MMUs can support swapping. What is swapping? Can swapping permit an application requiring 16M memory to run on a machine with 8M of RAM?
(Solved)
Base-limit MMUs can support swapping. What is swapping? Can swapping permit an application requiring 16M memory to run on a machine with 8M of RAM?
Date posted:
April 26, 2022
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Answers (1)
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List and describe the four memory allocation algorithms covered in lectures. Which two of the four are more commonly used in practice?
(Solved)
List and describe the four memory allocation algorithms covered in lectures. Which two of the four are more commonly used in practice?
Date posted:
April 26, 2022
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Answers (1)
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Describe the difference between external and internal fragmentation. Indicate which of
the two are most likely to be an issues on a) a simple memory memory...
(Solved)
Describe the difference between external and internal fragmentation. Indicate which of
the two are most likely to be an issues on a) a simple memory memory management machine
using base limit registers and static partitioning, and b) a similar machine using dynamic
partitioning.
Date posted:
April 26, 2022
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Answers (1)
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Why might filesystems managing external storage devices do write-through caching (avoid buffering writes) even though there is a detrimental affect on performance
(Solved)
Why might filesystems managing external storage devices do write-through caching (avoid buffering writes) even though there is a detrimental affect on performance
Date posted:
April 26, 2022
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Answers (1)
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What does flushd do on a UNIX system?
(Solved)
What does flushd do on a UNIX system?
Date posted:
April 26, 2022
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Answers (1)
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What is the maximum file size supported by a file system with 16 direct blocks, single,
double, and triple indirection? The block size is 512 bytes....
(Solved)
What is the maximum file size supported by a file system with 16 direct blocks, single,
double, and triple indirection? The block size is 512 bytes. Disk block numbers can be stored
in 4 bytes.
Date posted:
April 26, 2022
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Answers (1)
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Why might the direct blocks be stored in the inode itself?
(Solved)
Why might the direct blocks be stored in the inode itself?
Date posted:
April 26, 2022
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Answers (1)
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How can the block count in an in order differ from the (file size / block size) rounded up to
the nearest integer. Can the block...
(Solved)
How can the block count in an in order differ from the (file size / block size) rounded up to
the nearest integer. Can the block count be greater, smaller, or both
Date posted:
April 26, 2022
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Answers (1)
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Compare bitmap-based allocation of blocks on disk with a free block list
(Solved)
Compare bitmap-based allocation of blocks on disk with a free block list
Date posted:
April 26, 2022
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Answers (1)
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What file allocation strategy is most appropriate for random access files?
(Solved)
What file allocation strategy is most appropriate for random access files?
Date posted:
April 26, 2022
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Answers (1)
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What file access pattern is particularly suited to chained file allocation on disk?
(Solved)
What file access pattern is particularly suited to chained file allocation on disk?
Date posted:
April 26, 2022
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Answers (1)
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Give an example where contiguous allocation of file blocks on disks can be used in practice
(Solved)
Give an example where contiguous allocation of file blocks on disks can be used in practice
Date posted:
April 26, 2022
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Answers (1)
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Give a scenario where choosing a large filesystem block size might be a benefit; give an
example where it might be a hindrance
(Solved)
Give a scenario where choosing a large filesystem block size might be a benefit; give an
example where it might be a hindrance
Date posted:
April 26, 2022
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Answers (1)
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Give an example of a scenario that might benefit from a file system supporting an append-only access write
(Solved)
Give an example of a scenario that might benefit from a file system supporting an append-only access write
Date posted:
April 26, 2022
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Answers (1)
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Filesystems can support sparse files, what does this mean? Give an example of an
application's file organisation that might benefit from a file system's sparse file...
(Solved)
Filesystems can support sparse files, what does this mean? Give an example of an
application's file organisation that might benefit from a file system's sparse file support
Date posted:
April 26, 2022
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Answers (1)
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Describe the general strategy behind deadlock prevention, and give an example of a practical deadlock prevention method
(Solved)
Describe the general strategy behind deadlock prevention, and give an example of a practical deadlock prevention method
Date posted:
April 26, 2022
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Answers (1)
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What must the banker's algorithm know a priori in order to prevent deadlock?
(Solved)
What must the banker's algorithm know a priori in order to prevent deadlock?
Date posted:
April 26, 2022
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Answers (1)
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What are the four conditions required for deadlock to occur?
(Solved)
What are the four conditions required for deadlock to occur?
Date posted:
April 26, 2022
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Answers (1)
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What is deadlock? What is starvation? How do they differ from each other?
(Solved)
What is deadlock? What is starvation? How do they differ from each other?
Date posted:
April 26, 2022
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Answers (1)