Which memory area is used for local variables and function call frames, with automatic allocation and deallocation?

• A. Memory Heap
• B. Cache
• C. Memory Stack
• D. Registers

Answer: (C)

Local variables and function call frames live on the call stack, which is designed for automatic allocation and deallocation as functions are entered and exited. Each time a function is called, a new stack frame is created to hold the return address, parameters, saved state, and any local variables. When the function finishes, that frame is removed, reclaiming the memory without explicit free calls. This LIFO behavior makes the stack ideal for managing the temporary data used during a function’s execution. In contrast, the heap requires manual or GC-based management and isn’t tied to the function call lifecycle, while registers and caches aren’t intended to hold entire frames or support automatic lifetime management.