The file oldies-goldies has the details of the sale of books.The records are sorted on the names of the authors and are as follows 

        Alexandre Dumas

        Alexandre Dumas

        Alexandre Dumas

        Gerald Durrell

        Giovanni Guareschi

        Giovanni Guareschi

        James Herriot

        Louisa May Alcott

        Louisa May Alcott

        Louisa May Alcott

Based on the above information, what will be the output of the command

        uniq -u oldies-goldies ?

Which keystroke combination sends or signals an interrupt request to a process ?

Which command will you use to count the number of words in a file?

The main objective of a time-sharing operating System like UNIX is to :

Which command gives information about space being used by files and directories ?

The chmod command :

Which of the following files is configured for login name, login directory and login shell variables?

Suppose you have a file named trans and you want to display fields two to four. Which of the following commands will you use ?

Consider the following command cat re* Which of the following files will not be displayed by this command ?

Which screen manipulation command sets the screen to reverse video?

Which of the following commands can be used to communicate directly with other users by sending messages?