⟩ The permission -rwxr-r- represented in octal expression will be a) 777 b) 666 c) 744 d) 711
c) 744
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Do 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 lineAssuming the files fileA, fileB, fileAB, fileBC and fileABC, exist in a directory, which files match with the pattern file[ABC]? a) fileA, fileB and fileABC b) fileABC c) fileA and fileB d) fileAB, fileBC and fileABC
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