Question

In which of the following cases is it possible to obtain different results for call by reference and call by name parameter passing methods?

• A. Passing a constant value as a parameter
• B. Passing the address of an array as a parameter
• C. Passing as an array as parameter
• D. Passing an array element as a parameter

Answer 1

The correct option is B Passing the address of an array as a parameter

Passing the address of an array as a parameter is possible to obtain different results for call by reference and call by name parameter passing methods.

Call by reference:-

When we pass the address of an array while calling a function then this is called function call by reference. When we pass an address as an argument, the function declaration should have a pointer as a parameter to receive the passed address.

Pass by name:-

This technique is used in programming language such as Algol. In this technique, symbolic “name” of a variable is passed, which allows it both to be accessed and update.