What is the difference between stack and heap when working with threads in multithreaded applications?

Stack and heap are different areas of memory used differently in multitasking applications:

• Stack is memory allocated for each thread separately. Local variables, function parameters, and return addresses are stored in the stack. The stack has a limited size and operates on a LIFO (last-in, first-out) principle. It is quickly allocated and freed when functions are called and completed.

• Heap is a shared memory area accessible to all threads. Objects and data allocated dynamically (for example, using new in Java) are stored in the heap. Managing the heap is more complex, requiring a garbage collector, and access to it is slower than to the stack.

When working with threads, it is important to remember that the stack is isolated for each thread, while the heap is shared, so synchronization is necessary for data in the heap to prevent race conditions.