d) all of the mentioned
dup2(1,0) a) closes the stdout and copies the stdin descriptor to stdout b) closes the stdin and copies the stdout descriptor to stdin c) will produce compilation error d) None of the above
If the fork() system call returns -1, then it means? a) No new child process is created b) The child process is an orphan c) The child process is in Zombie
Which function can be used instead of the dup2 to duplicate the file descriptor? a) read() b) open() c) stat() d) fcntl()
Below is the code
int main() {
int fd1, fd2;
struct stat buff1, buff2;
fd1 = open("1.txt", O_RDWR);
fd2 = open("2.txt", O_RDWR | O_APPEND);
lseek(fd1, 10000, SEEK_SET);
write(fd1, "abcdefghij", 10);
write(fd2, "abcdefghij", 10);
fstat(fd1, &buff1);
fstat(fd2, &buff2);
printf(" %d %d", buff1.st_size, buff2.st_size);
return 0;
}
Before running the program, the file 1.txt and 2.txt size is 20 each. What is the output?
a) 30 30
b) 100020 20
c) 100030 30
d) 100010 30Code snippets str1="45678n" str2="123n" f1 = fopen(file1,RDWR,RWX) f2 = fopen(file1,RDWR,RWX) write(f1,str1,len_str1) write(f2,str2,len_str2) o/p a) 12378 b) 123(newline)8(newline) c) 123(newline)78(newline) d) 45678(newline)123(newline)
What UNIX command is used to update the modification time of a file? a) time b) modify c) cat d) touch
When mv f1 f2 is executed which file's inode is freed? a) f1 b) f2 c) new inode will be used d) implementation dependent
Who owns the data dictionary in Linux?
You routinely compress old log files. You now need to examine a log from two months ago. In order to view its contents without first having to decompress it, use the _________ utility in Linux
You suspect that you have two commands with the same name as the command is not producing the expected results. What command can you use to determine the location of the command being run?
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