What is the output of this program?
#include<stdio.h>
#include<fcntl.h>
int main()
{
int fd, count;
char ch;
fd = open("demo.txt",O_RDWR|O_CREAT);
write(fd,"s",1);
lseek(fd,0,SEEK_SET);
write(fd,"d",1);
lseek(fd,0,0);
read(fd,&ch,1);
printf("%c\n",ch);
return 0;
}
#include<stdio.h>
#include<fcntl.h>
int main()
{
int fd, count;
char ch;
fd = open("demo.txt",O_RDWR|O_CREAT);
write(fd,"s",1);
lseek(fd,0,SEEK_SET);
write(fd,"d",1);
lseek(fd,0,0);
read(fd,&ch,1);
printf("%c\n",ch);
return 0;
}A. d
B. s
C. sd
D. none of the mentioned
Answer: Option D
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