Interested to Buy Any Domain ? << Click Here >> for more details...
Read the following program carefully and write the output
of the program. Explain each
line of code according to given numbering.
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
1……………… int main (void)
{
pid_t pid;
2………………………… pid = fork();
3…………………………. if (pid > 0)
{
int i;
4………………………… for (i = 0; i < 5; i++)
{
5………………… …………… printf(" I AM VU : %d\n", i);
6………………… …………… sleep(1);
}
exit(0);
}
7………………… ……… else if (pid == 0) {
int j;
for (j = 0; j < 5; j++)
{
8……………………………… printf(" I have no child: %d\n", j);
sleep(1);
}
_exit(0);
}
else
{
9………………………………fprintf(stderr, "can't fork, error %d\n",
errno);
10……………… … ………… exit (EXIT_FAILURE);
}
}
- 1 Answers
- 4859 Views
- I also Faced
- E-Mail Answers
Answer / saith
1 int main (void) Starts the main function
2 pid = fork ( ); The fork ( ) method will call and store
the integer value in the pid variable. In case of Child “0”
value returned while the parent will store the “process id”
of the child. In case when fork fails it will be
initialized by -1
3 if (pid > 0) This condition will be only true when fork
failed.
4 for (i = 0; i < 5; i++) Limmitations of for loop are
declared and the loop starts
5 printf(" I AM VU : %d\n", i);
Prints I AM VU and the value of I message on screen
6 sleep(1); Process sleeps
7 else if (pid == 0) Now this blok of code executes in
parent process since fork returns the ID to the parent
process from child. which is not 0.
8 printf(" I have no child: %d\n", j);
“I have no child” is printed on the screen
9 fprintf(stderr, "can't fork, error %d\n", errno);
If the given conditions are not true then this error
message is send
10 exit (EXIT_FAILURE); system call will terminate the
process abnormally as it fails.
| Is This Answer Correct ? | 4 Yes | 0 No |
Is c++ low level?
I want to write a C++ language program that: 1. Reads in the size of a square from the screen; 2. Prints a hollow square of that size out of “-“, “|” and blanks on screen; 3. Prints the same hollow square onto a text file. The program should work for squares of all side sizes between 1 and 20.
How many lines of code you have written for a single program?
Why do we need function?
What things would you remember while making an interface?
What is the keyword auto for?
Write a program that will count the number of digits in an input integer up to value MAX_VALUE (2147483647). Thus, for an input of 5837 the output should be 4 digits Make sure that your program works for the numbers 0, 1, and 10. For the number 0, the output should be 1 digit
What is object oriented programming (oop)?
throw Can constructors exceptions?
Is it possible to get the source code back from binary file?
Is atoi safe?
What are the types of pointer?
STL 
