What is a common task performed during door operations?

A common task performed during door operations involves maintaining and enhancing the functionality and aesthetic appeal of doors, which includes painting and replacing locks. This not only helps in improving the appearance of the doors but also ensures security. Painting can refresh a door's look and protect it from elements, while replacing locks can enhance security, especially in cases where locks are old or compromised.

Installing new doors, removing existing doors, and adjusting door frames may also be tasks related to door operations, but they do not encompass the ongoing maintenance that painting and lock replacement represent. Both painting and lock replacement are essential upkeep tasks that can significantly contribute to the overall effectiveness and longevity of a door in various types of properties.