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Memory Management - Oct 29, 2008, 17:35 pm by Amit Satpute
Explain the types of memory.
The basic types of memories that a computer has are:
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RAM Random access memory
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ROM Read Only memory
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Cache Memory
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Other than these a computer also has secondary storage devices like a hard disk
which also contribute towards it memory.
Define compactions.
Compaction is the process of reducing the amount of data needed for the storage
or transmission of a given piece of information.
What is virtual memory?
The virtual memory is a mechanism of extending the computer's memory through the
use of the computer’s secondary storage. Due to this the running applications
get an impression of having a large contiguous main memory available for the
use.
What is dirty bit?
A dirty bit is a flag that indicates whether an attribute needs to be updated.
Such situations usually occur when a bit in a memory cache or virtual memory
page that has been changed by a processor but has not been updated in the
storage.
What is page fault and when does it occur?
A page is a fixed length memory block used as a transferring unit between
physical memory and an external storage. A page fault occurs when a program
accesses a page that has been mapped in address space, but has not been loaded
in the physical memory.
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