GATE CSE 1992 | Question: 10a

Question

What type of parameter passing mechanism (call-by-value, call-by-reference, call-by-name, or-by-value result) is the following sequence of actions trying to implement for a procedure call $P (A[i])$ where P (i:integer) is a procedure and A is an integer array?

Is the implementation correct? Explain and correct it if necessary. You are supposed to make only small changes

• A. Create a new local variable, say z.
• B. Assign to z the value of A[i].
• C. Execute the body of P using z for A[i]

• D. Set A[i] to z.​

Answer 1

implement the call by value result parameter passing technique 
as value is first copied
all changes done in local variable
and then again value copied in actual variable