⟩ Binary or executable files are a) Regular files b) Device files c) Special files d) Directory files
a) Regular files
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What is the output of this program?
#include<stdio.h>
#include<fcntl.h>
int main()
{
int fd, fd2, ret;
fd = open("san.c",O_RDONLY);
ret = close(fd2);
printf("%dn",ret);
}
a) 0
b) 1
c) -1
d) none of the mentionedWhat is the output of this program?
#include<stdio.h>
#include<stdlib.h>
#include<fcntl.h>
int main()
{
int fd, new_fd;
char *buff;
buff = (char *)malloc(sizeof(char)*8);
fd = open("san.c",O_RDONLY);
new_fd = dup(fd);
close(fd);
read(new_fd,buff,8);
printf("%sn",buff);
}
a) this program will not print anything
b) this program will print "#include"
c) this program will give the segmentation fault
d) this program will give the syntax errorWhat is the output of this program?
#include<stdio.h>
#include<fcntl.h>
int main()
{
int fd, count;
char ch[10];
fd = open("google.txt",O_RDWR|O_CREAT);
write(fd,"linux",5);
lseek(fd,2,SEEK_END);
write(fd,"san",3);
lseek(fd,0,0);
count = read(fd,ch,10);
printf("%sn",ch);
return 0;
}
a) linux
b) linuxsan
c) linux san
d) none of the mentionedTell me what is the output of this program?
#include<stdio.h>
#include<fcntl.h>
int main()
{
int fd, count;
char ch;
fd = open("google.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("%cn",ch);
return 0;
}
a) d
b) s
c) sd
d) none of the mentionedDo you know what is the output of this program?
#include<stdio.h>
#include<stdlib.h>
#include<fcntl.h>
int main()
{
int fd;
char *buff;
buff = (char *)malloc(sizeof(char)*5);
fd = open("google.txt",O_RDWR|O_CREAT);
write(fd,"Linux",5);
read(fd,buff,5);
printf("%sn",buff);
}
a) it will print nothing
b) it will print the string "Linux"
c) segmentation fault
d) none of the mentionedTell us what is the output of this program?
#include<stdio.h>
#include<stdlib.h>
#include<fcntl.h>
int main()
{
int fd, count;
char ch, *buff;
buff = (char *)malloc(sizeof(char)*10);
fd = open("san.c",O_RDONLY);
count = read(fd,buff,5);
printf("%dn",count);
return 0;
}
a) 5
b) 10
c) 0
d) -1What is the output of this program?
#include<stdio.h>
#include<fcntl.h>
int main()
{
int fd, count;
fd = open("san.c",O_RDONLY);
count = write(fd,"Linux",5);
if(count != 5)
perror("write");
return 0;
}
a) it will write the string "Linux" in the beginning of source file "san.c"
b) it will write the string "Linux" in the end of the source file "san.c"
c) segmentation fault
d) none of the mentionedDo you know what is the output of this program?
#include<stdio.h>
#include<fcntl.h>
int main()
{
int fd, count;
fd = open("google.txt",O_WRONLY|O_CREAT);
count = write(fd,"Linux System Programming",5);
if(count != 5)
perror("write");
return 0;
}
a) it will create a file "google.txt" in the present working directory
b) it will write the string "Linux System Programming" in the file "google.txt"
c) both (a) and (b)
d) none of the mentionedOutput of this program?
#include<stdio.h>
#include<fcntl.h>
int main()
{
pid_t fd;
char ch;
int count;
fd = open("san.c",O_RDONLY);
do{
count = read(fd,&ch,1);
printf("%c",ch);
}while(count);
return 0;
}
a) it will print nothing
b) it will print the source code of the source file "san.c"
c) segmentation fault
d) none of the mentionedIn the output of this program, the string "/* Linux */" will be added at the ____ of the source file.
#include<stdio.h>
#include<stdlib.h>
#include<fcntl.h>
int main()
{
int fd;
fd = open("san.c",O_RDWR|O_APPEND);
write(fd,"/* Linux */",11);
return 0;
}
a) end
b) beginning
c) second line
d) third line
