Garbage Collection is best described as?

• A. A repository for version control on code.
• B. A protocol for transmitting data.
• C. A markup language for web pages.
• D. A form of automatic memory management that frees up memory space when it is no longer needed.

Answer: (D)

Garbage collection refers to automatic memory management in many programming languages. It frees up memory space by reclaiming objects that are no longer reachable or needed by the program. When you create objects, memory is allocated on the heap; as the program runs, references to those objects may disappear. The garbage collector identifies these unreachable objects and reclaims their memory, helping prevent memory leaks and reducing the need for manual deallocation. Some languages use techniques like tracing or reference counting, and collectors can run periodically or alongside the program.

The other options describe things unrelated to memory management: a version-control repository tracks changes to code, a data transmission protocol governs network communication, and a markup language structures web pages.