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Memory Articles
Page 4 of 4
Difference Between fork() and vfork()
In this post, we will understand the difference between system calls fork and vfork −The ‘fork’ system callIn this system call, the child and parent process have separate memory spaces.The child and parent process are executed simultaneously.This call uses the copy-on-write as alternative.Child process doesn’t have the ability to suspend execution of the parent process in this system call.The page of one process doesn’t get affected by the page of other process.It is more frequently used.No address space is wasted.If the child process alters the page in the address space, it is not visible to the parent process.The ‘vfork’ system ...
Read MoreDifference Between Internal and External fragmentation
In this post, we will understand the difference between internal and external fragmentation −Internal FragmentationThe difference between the memory allocated and the space required is known as internal fragmentation.In this fragmentation, fixed-sized memory blocks are used to process data.This process occurs when a method or process is larger than the required memory.The method used in internal fragmentation is ‘best-fit’ block.It occurs when the memory is divided into fixed sized partitions.External FragmentationThe unused spaces that is formed between fragments of non-contiguous memory, which are too small to help with a new process, is known as external fragmentation.It uses variable-sized memory blocks ...
Read MoreDifference Between Linker and Loader
In this post, we will understand the difference between a linker and a loader −LinkerThe main function of the linker is to generate executable files.The linker takes the input as the object code which would be generated by a compiler/assembler.The process of linking can be understood as a method to combine different snippets of code in order to obtain executable code.There are two types of linkers available: Linkage Editor and Dynamic Linker.Linker also helps combine all the object modules.Linker is responsible to arrange the objects in the program’s address space.LoaderThe main function of a loader is to load executable files ...
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