Final answer:
No, center marks are not perfect for all holes by default in Solidworks.
Step-by-step explanation:
No, center marks are NOT perfect for all holes by default in Solidworks. Center marks in Solidworks are used to automatically add center marks to holes and other cylindrical features on a drawing view. However, their accuracy depends on the placement of the center points of the features.
If the center points are correctly defined, then center marks will be accurate. However, if the center points are not accurately defined, the center marks may not be correct. It is important to ensure that the center points are properly established in order to have accurate center marks on the drawing.