Question

Answer the following in brief. Give a reason/example wherever applicable.

Explain Call by Value and Call by Reference.

Answer 1

Call by Value:
In call by value, a copy of the actual value is passed to the method. Any changes made inside the method do not affect the original variable.

• Example:

void update(int x)
{
x = 20;
}

• Reason: The method receives a separate copy of the value.

Call by Reference:

In call by reference, the reference of the original data is passed to the method. Changes made inside the method affect the original data.

• Example: Passing an object reference to a method can modify the object's data.
• Reason: The method accesses the same memory location of the origina