Go back to 642-770 - Operational Foundations for Cisco Service Provider Core Networks

Question :-

What will happen if a new version of Cisco IOS XR Software is installed and activated, and then the router reloads?
When the router comes back, the new version is loaded and the old and new versions are on disk0.
When the router comes back, the new version is loaded and only the new version is on disk0.
When the router comes back, the old version is loaded and the old and new versions are on disk0.
When the router comes back, the old version is loaded and only the old version is on disk0.

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