Study the following statements and select the incorrect one :

UNIX offers the following benefits :

In UNIX , shell is a program which :

Which of the following commands can be used to view the calendar of April 2007?

You want to search for the pattern 'Newa' or 'Newb' or 'Newc'. Which regular expression will you use with the grep command ?

Which of the following statements is incorrect regarding variables?

To list the current users logged on to the system you use:

How does Unix maintain its time clock?

To be run by the shell, a shell script needs the following permission(s):

When you execute the command 'cp . newdir', you...

The command that would append the output from the encrypter to the current contents of the file private and read in the contents of the file top_secret, is: