What is the role and purpose of memory areas when working with programs?

Memory areas in program operation serve to organize and manage data during execution. In Java, the main memory areas include:

• Stack — stores local variables and method calls. Each thread is allocated its own stack.
• Heap — an area for dynamic allocation of objects and arrays. Managed by the garbage collector.
• Metaspace — stores class metadata and other information about the program's structure.

The role of these areas is to ensure efficient storage and access to data, separate the lifetime of objects and variables, and maintain security and isolation between threads. For example, local variables live only on the current method's stack, while objects in the heap can be used by multiple threads as long as there are references to them.