System Call

Which of the following standard C library functions will always invoke a system call when executed from a single-threaded process in a UNIX/Linux operating system?
[MSQ]

The following C program is executed on a Unix / Linux system:

#include < unistd.h >
  int main() {
    int i;
    for (i = 0; i < 10; i++)
      if (i % 2 == 0) fork();
    return 0;
  }

The total number of child process created is __________ .

The difference between a named pipe and a regular file in Unix is that

The following C program:

 {
    fork(); fork(); printf("yes");
    
}

If we execute this core segment, how many times the string yes will be printed?

The Linux command

 mknod myfifo b 4 16

Wha is the output of the following program?

 main()
{
    int a = 10;
    if(fork()) == 0))
        a++;
    printf("%d\n",a);  
}

Consider the following program.

 main()
{
    fork();
    fork();
    fork();
}

How many new processes will be created?

Identify the correct order in which a server process must invoke the function calls accept, bind, listen, and recv according to UNIx socket API.

A process executes the code
fork();
fork();
fork();
The total number of child processes created is

Which of the following UNIX command allows scheduling a program to be executed at the specifies time?