MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -The stack is faster because the access pattern makes it trivial to allocate and deallocate memory from it (a pointer/integer is simply incremented or decremented), while the heap has much more complex bookkeeping involved in an allocation or free.

Detailed explanation-2: -Dynamic memory allocation and deallocation are very slow operations when compared to automatic memory allocation and deallocation. In other words, the heap is much slower than the stack.

Detailed explanation-3: -Heap memory is slightly slower to be read from and written to, because one has to use pointers to access memory on the heap. We will talk about pointers shortly. Unlike the stack, variables created on the heap are accessible by any function, anywhere in your program. Heap variables are essentially global in scope.

Detailed explanation-4: -Stack variables do not require allocating on the heap, which is managed by a memory allocator, which is a slow process. Stack variables do not need to be “freed”, which is also a slow process.