Every type of applications can be run on Linux, which are
run on other OS like Microsoft, Apple & so on. all
applications of desktop or server related are run according
to flavor of that Linux.
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?
You locate a command in the /bin directory but do not know what it does. What command can you use to determine its purpose
You wish to create a link to the /data directory in bob's home directory so you issue the command ln /data /home/bob/datalink but the command fails. What option should you use in this command line to be successful.
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