Yes. The call or meeting is an inflexible event. Should I start working on something that requires a lot of active context memory at 9? What if I'm deep in it

Yes. The call or meeting is an inflexible event. Should I start working on something that requires a lot of active context memory at 9? What if I'm deep in it and then the calendar goes ding for the meeting and I need to get in the call mid-thought? Can you just stop working on stuff, have a meeting, and pick up exactly where you left off with nothing lost?