how would you execute a shell command from within a perl script

Which function is not used for hash processing?

How would you remove an element from hash?

What's is DBI and DBD?

What does Perl -e on the command line do?

Which would declare a global variable?

In Perl, which is a non-whitespace character?

Which command is used to confirm the installation of Perl on the Windows operating system?

Which Perl debugging commands is used for displaying all the loaded modules and their versions?

In relation to use strict; in Perl, a variable must be declared with which of the following keywords in order to use it for the first time?

In relation to identifier parsing in Perl, which of the following options is invalid?