How to verify the installed package - pacman and ArchLinux

Just had a doubt that all files are in place. It is easy to check the files presence and condition of installed package:
[bart@server1 ~]$ pacman -Qk procps-ng
procps-ng: 85 total files, 0 missing files

BTW the way to keep your system always uptodate (thanks to rolling on releases):
[bart@server1 ~]$ sudo pacman -Syu

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