1. The data structure used by UNIX to maintain file identification is
Ans.: inode
Explanation: Every file has a separate inode and unique inode number.
2. What does the command 'wc' perform in unix?
Ans.: It performs word count.
Side note: 'wc-c' counts number of characters in a file.
'wc-l' counts lines in a file.
3. What meant by redirection?
Ans.: It is used to direct the flow of data to the file or from the file for input or output of another file.
4. Difference between absolute path and relative path
Ans.: Absolute path: Exact path from root directory.
Relative path: Relative to current path.
