i am going to study any one of the scripting languages mentioned above(shell 0r perl scripting) . Which is having more scope for a fresher?
Depends on what you want to do. For anything from SA tasks to small applications I'd say shell scripting, for larger applications Perl. Or even better, why not take up both. I frequently use Perl one-liners in place of a commandline that would use a few pipes otherwise, and use shell scripting to glue together different Perl scripts.