Not very quickly, no. If the task needed working memory (keeping count or something), that will be gone. I'll need to take a moment to reassess what I was doing and where I'm up to. If there were X,Y,Z subtasks, I'll need to check which ones are done and which not. A long enough interruption and I might forget entirely and not return to the task at all. If someone interrupts me by trying to help, and I don't immediately understand what they're trying to do, I find that very irritating.
Disagree. I'm leaning towards Definitely Disagree but it's not a definite definitely haha.