What are smart pointers? What purpose do they serve? Summarize the differences among mark-and-sweep, stop-and-copy, and generational garbage collection. What is pointer reversal? What problem does it...

What are smart pointers? What purpose do they serve? Summarize the differences among mark-and-sweep, stop-and-copy, and generational garbage collection. What is pointer reversal? What problem does it address? 30. What is “conservative” garbage collection? How does it work?