____ is a tool designed to help developers to write safer scripts by forcing them to think about external input validation and protecting them from accidentally performing unsafe operations, such as unwillingly changing external resources.

If a local variable in a called method shares its name with a variable with class scope, then ________.

a) a syntax error occurs b) the local variable is assigned the value of the class scope variable c) the class scope variable is hidden until the called method terminates execution d) the local variable is hidden until the called method terminates execution e) None of the above.

When a data flow diagram (DFD) is exploded, the lower-level diagram is referred to as the parent diagram.

Answer the following statement true (T) or false (F)