Question

When x=10 and y=x,which of the following memory assignment is correct answer is

Answer 1

Answer:

X and Y will have two distinct location and 10 will be saved in both

Explanation:

• At first line that is X=10, the value of 10 is stored in X. So, the first designation of the value of 10 is done to X.
• Whereas the in the next syntax the value of X is said to be Y, meaning the everything that is designated to X is now transferred to the variable Y.
• Making the new variable that contains 10 is Y but 10 has not vacated its previous address it just has duplicated itself now both X and Y contains the same value but in different location.

Answer 2

X and Y will have different memory location with same value 10.

There are two types of copy.  

1. Shallow copy      2 Deep Copy

Shallow copy: Copies only values but does not share or point to same memory location

Deep copy: Copies values as well as share memory location. If the value of one variable changes it changes the other also.

The given statement, y = x belongs to shallow copy, because only the value of x is copied to y and it does not share address. If these both are pointer variable then address can be assigned and shared and thus perform a deep copy.