What is the size of *p in this code on a 64-bit machine?int **p;8 bytes4 bytes16 bytesI don't know

Break Down the Problem

1. Identify the type of the variable p.
2. Understand how pointer sizes vary on a 64-bit machine.

Relevant Concepts

1. On a 64-bit machine, pointers are typically 8 bytes in size.
2. The variable p is a pointer to a pointer (int **p), which means it is a pointer that points to another pointer.

Analysis and Detail

1. The type of p is int **, which means it is a pointer to a pointer to an integer.
2. Despite the level of indirection (pointer to pointer), the size of p itself does not change based on what it points to. It remains the size of a pointer on a 64-bit architecture.

Verify and Summarize

• Since p is a pointer type and we are on a 64-bit machine, we conclude that the size of p is 8 bytes.

Final Answer

The size of p on a 64-bit machine is 8 bytes.