Which statement about garbage collection in managed languages is most accurate?

Which statement about garbage collection in managed languages is most accurate?

• A. Garbage collection eliminates manual memory management entirely.
• B. Garbage collection automatically reclaims unused memory, and can introduce pause times that affect performance.
• C. Garbage collection always runs in constant time.
• D. Garbage collection never interferes with program execution.

Answer: (B)

Garbage collection handles memory for you by identifying objects that can no longer be reached and reclaiming that memory automatically. This means you don’t have to manually free every object as you would in languages with explicit memory management. But this process isn’t without impact. The collector often needs to pause the program to inspect the heap and perform reclamation, and the length of these pauses can vary depending on heap size, object lifetimes, and the collector’s strategy. Some collectors try to minimize pauses with concurrent or incremental approaches, but you can’t guarantee perfectly smooth performance in every case. It’s also worth noting that garbage collection doesn’t eliminate all memory-management concerns in practice. You may still deal with non-memory resources (like file handles or sockets) that require explicit release, and GC timing is not guaranteed to be constant or zero. The statement that best describes garbage collection is that it automatically reclaims unused memory and can introduce pause times that affect performance.

Garbage collection handles memory for you by identifying objects that can no longer be reached and reclaiming that memory automatically. This means you don’t have to manually free every object as you would in languages with explicit memory management.

But this process isn’t without impact. The collector often needs to pause the program to inspect the heap and perform reclamation, and the length of these pauses can vary depending on heap size, object lifetimes, and the collector’s strategy. Some collectors try to minimize pauses with concurrent or incremental approaches, but you can’t guarantee perfectly smooth performance in every case.

It’s also worth noting that garbage collection doesn’t eliminate all memory-management concerns in practice. You may still deal with non-memory resources (like file handles or sockets) that require explicit release, and GC timing is not guaranteed to be constant or zero. The statement that best describes garbage collection is that it automatically reclaims unused memory and can introduce pause times that affect performance.