MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -Dynamic data structures are of dynamic size and memory is allocated at the runtime for them by the program. Memory is deallocated for dynamic data structure only when the program ends or the user deallocates it manually by using the free() function in C or delete() function in C++.

Detailed explanation-2: -Dynamic Memory Allocation is a process in which we allocate or deallocate a block of memory during the run-time of a program. There are four functions malloc(), calloc(), realloc() and free() present in <stdlib. h> header file that are used for Dynamic Memory Allocation in our system.

Detailed explanation-3: -In C, dynamic memory is allocated from the heap using some standard library functions. The two key dynamic memory functions are malloc() and free(). The malloc() function takes a single parameter, which is the size of the requested memory area in bytes. It returns a pointer to the allocated memory.

Detailed explanation-4: -“Heap” memory, also known as “dynamic” memory, is an alternative to local stack memory. Local memory is quite automatic. Local variables are allocated automatically when a function is called, and they are deallocated automatically when the function exits.

Detailed explanation-5: -The heap consists of a pool of memory which can be allocated to variables during the execution of the program. The heap makes dynamic variables possible, because these are variables which change in size during execution.