What is a common feature of all types of drywall screws?

All types of drywall screws are specifically designed for drywall installation, which is why this option is correct. Drywall screws typically feature a sharp point that allows them to easily penetrate through drywall and into the underlying framing, making them especially suitable for this purpose. Additionally, they are designed to resist stripping and to support the weight of the drywall sheets effectively.

The other options do not accurately represent common characteristics of drywall screws. For instance, not all drywall screws are the same length; they can come in various sizes, including shorter and longer lengths depending on the application. While some drywall screws may be coated to prevent rust or for other purposes, they are not universally coated in paint. Furthermore, drywall screws can have different head types, such as flat, pan, or bugle heads, which makes the head type not universally the same across all drywall screws.