Question

When is a variable called extending access beyond visibility?

(a) Passing a reference as an argument

(b) Passing an argument by reference (which uses aliasing)

(c) Returning a reference from a sub-program

(d) All of the mentioned

The question was asked during an online exam.

This interesting question is from Visibility, Accessibility and Information Hiding in portion Visibility, Accessibility and Information Hiding of Software Architecture

Answer 1

Correct option is (d) All of the mentioned

The explanation: Making a variable accessible in a portion of a program where it is not visible is called extending access beyond visibility while Passing a reference as an argument, Passing an argument by reference (which uses aliasing), Returning a reference from a sub-program.