Which statement about stack memory is correct?

Which statement about stack memory is correct?

• A. It uses FIFO ordering
• B. It uses LIFO ordering
• C. It is stored on the heap
• D. It is located in ROM

Answer: (B)

Stack memory follows a Last In, First Out organization. Each time a function is called, a frame is pushed onto the stack containing the return address, parameters, and local variables. When the function finishes, that frame is popped off, and control returns to the caller, returning in the reverse order of the calls. This behavior ensures proper management of nested calls and their data lifetimes. This is why the statement about stack memory being LIFO is correct. It isn’t about a FIFO (queue) structure, so the idea of first in, first out doesn’t apply here. Stack memory isn’t the same as heap memory, which is used for dynamic allocations that you manage manually and that live until you free them. And it isn’t ROM, which is read-only firmware storage and not where a program’s runtime call frames reside.

Stack memory follows a Last In, First Out organization. Each time a function is called, a frame is pushed onto the stack containing the return address, parameters, and local variables. When the function finishes, that frame is popped off, and control returns to the caller, returning in the reverse order of the calls. This behavior ensures proper management of nested calls and their data lifetimes.

This is why the statement about stack memory being LIFO is correct. It isn’t about a FIFO (queue) structure, so the idea of first in, first out doesn’t apply here. Stack memory isn’t the same as heap memory, which is used for dynamic allocations that you manage manually and that live until you free them. And it isn’t ROM, which is read-only firmware storage and not where a program’s runtime call frames reside.