Question

A _________ variable provides an alias for a Previously defined variable.

• A. Global
• B. Local
• C. Reference
• D. Dynamic

Answer 1

Answer: (C)

Reference

A reference variable provides an alias for a previously defined variable.

A reference variable is an alias, that is, another name for an already existing variable. Once a reference is initialized with a variable, either the variable name or the reference name may be used to refer to the variable.

Alias variable:-

This function defines the symbol new-alias as a variable alias for symbol base-variable. This means that retrieving the value of new-alias returns the value of base-variable, and changing the value of new-alias changes the value of base-variable.