Answer Posted / yohannes tizazu

Logical address (virtual address) refers to a memory
location independent of the current assignment of data to
memory

Physical address (absolute address) the absolute location
of unit of data in memory

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1029

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548

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785

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562

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When i run a programm of orphan process. Instead of getting child's parent (ppid)=1 ..i get 1400 and it varies as per system. How can i findthe right soluion??? My pgm: #include # include int main() { int pid; pid=fork(); if(pid < 0) {exit(-1);} else if(pid==0) { printf("Child Process is Sleeping ..."); sleep(10); printf("Orphan Child's Parent ID : %u ",getppid()); } else { printf("Parent Process Completed ... %u ",getpid()); exit(0); } return 0; } Output:

1766

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561

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584

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What are the differences among a system call, a library function, and a unix command?

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