The value assigned to an array cell must be.

Dereferencing refers to.

Which meta character creates a single expression or atom?

Which begin or end a system command string in Perl?

Which loop is usually used to process array?

Which parameter does the printf function take?

Which data types are supported in Perl?

What is the default scope of perl variables?

Which Library Modules are available in Perl? Check all that apply.

What value do variables have before they are first assigned?

Which special variable represents current line number?