Answer Posted / saurabh

NOTE:- os is an interface between user and hardware is not totally CORRECT defination,,,,,,my GATE TEACHER (MR NILAY KHARE SIR)IITIAN HAS GAVE ME 100% CORRECT DEFINATION........

:CORRECT DEFINATION IS GIVEN BELOW:-

OS IS AN INTERFACE BETWEEN USER AND COMPUTER RESOURCES(ie.HARWARE,SOFTWARE,DATA)

S,those who posted interface between user and hardware is not fully correct.so if you say my defination to an interviewer then interviewer will definatally impressed by you.

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:

2253

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Is command prompt unix?

1136

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What is the use of egrep command in unix?

1171

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What does the “echo” command do?

1143

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What is the use of find command in unix?

1132

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Which command is used to create a directory?

1152

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What happens when we execute a unix command?

1125

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What does grep v grep do?

1069

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What are the general commands in using unix os for a beginner?

1162

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Name the various commands that are used for the user information in unix.

1077

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How is the command '$cat file2 ' different from '$cat >file2 and >> redirection operators ?

1300

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Write a command to display a file’s contents in various formats?

1194

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What is the size of time_t?

1199

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What is the behavioural difference between cmp and diff commands?

1268

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What is the comma to show the space allocation of files?

1080

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