Gate@Zeal Test series

Question

How to calculate the sizeof(arr2)?

Comments

Depends on machine.

sizeof(arr2)=sizeof(int*)= 8 byte for 64 bit system and 4 byte for 32 bit system.

Answer 1

The sizeof( ) operator in C/C++  is used to find the memory its operand occupies in the computer’s memory.Sizeof is an unary operator. sizeof - Wikipedia

Now sizeof(arr2) will return the memory pointer arr2 occupies in your computer’s memory. arr2 is a pointer to an integer array. So arr2 will need space to store the base address of the integer array(here this array also contains some address which are r1 and r2) for which 8 bytes will be allocated in 64 bit system and 4 bytes will be allocated in 32 bit system.So the o/p depends on machine.

Comments

What answer your machine gave?

---

Arjun sir in my machine its 8

---

But here answer given is an option (B).
Even onlinegdb(an online compile) is giving answer as an option (B).
@arjun Sir, please explain.

Answer 2

(Number of elements)*(size of each elements) which depends on the machine.