Answer Posted / manikantan t s

unix :- multi user, multi processing and multi tasking
operating system

Which command is used to create a directory?

1103

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What will the following command do?

1078

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Differentiate cat command from more command.

1091

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What command is used to check the current users?

1077

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Is there a way to erase all files in the current directory, including all its sub-directories, using only one command?

1348

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What is the functionality of a top command?

1061

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How does pipe () work?

1046

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How do I use nslookup?

1053

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What is ‘ps’ command for?

1146

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What difference between cmp and diff commands?

1258

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What is awk used for?

1088

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Which command is used to copy files?

1128

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How do I use grep to search for a file?

1016

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What are filter commands in unix?

1125

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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:

2214

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