Which term stores the address of the next data element to be stored onto the stack?

Which term stores the address of the next data element to be stored onto the stack?

• A. Extended Base Pointer (EBP)
• B. Extended Instruction Pointer (EIP)
• C. Extended Source Index (ESI)
• D. Extended Stack Pointer (ESP)

Answer: (D)

The concept being tested is how the processor tracks where the next stack operation will write data. The Stack Pointer register holds the address of the top of the stack, so it’s the location where the next push will place data. In 32-bit x86, this is ESP. When you push, the processor moves ESP downward and writes to the new [ESP]; when you pop, it reads from [ESP] and moves ESP upward. The other registers have different roles: EBP is typically used as a frame/base pointer for local variables in a function, EIP is the address of the next instruction to execute, and ESI is a general-purpose index register often used in memory/string operations.

The concept being tested is how the processor tracks where the next stack operation will write data. The Stack Pointer register holds the address of the top of the stack, so it’s the location where the next push will place data. In 32-bit x86, this is ESP. When you push, the processor moves ESP downward and writes to the new [ESP]; when you pop, it reads from [ESP] and moves ESP upward. The other registers have different roles: EBP is typically used as a frame/base pointer for local variables in a function, EIP is the address of the next instruction to execute, and ESI is a general-purpose index register often used in memory/string operations.