I recall a practice question about how OpenStack interacts with users, and I think option B is definitely right since it mentions APIs and command lines.
I'm not entirely sure about option D. I thought OpenStack had some built-in capabilities for fault management, but maybe it does rely on third-party tools?
Okay, I think I've got it. Selecting multiple Vswitches in multiple Zones within a Region is the key to improving the stability and reliability of the Scaling Group. The other options don't seem to directly address that.
Okay, I think I've got it. Waterfall is focused on delivering software based on a predefined plan, while Agile is more about responding to customer needs. So the Waterfall feature that's no longer used in Agile must be the sequential execution of predetermined stages.
All the options seem correct to me, but I'm not sure about option D. Does OpenStack really require a third-party system for troubleshooting? I thought it had built-in monitoring and diagnostics.
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