Autodesk Certified Professional in AutoCAD for Design and Drafting Practice Exam

Which two of the following are valid object type options in the BOUNDARY command?

1. Curve and Circle

2. Region and Polyline

3. Line and Arc

4. Rectangle and Polygon

The correct answer is: Region and Polyline

The BOUNDARY command in AutoCAD is utilized to create a region or a closed polyline boundary based on existing objects. This command can generate a boundary from various types of objects, two of which are regions and polylines. Both of these object types are specifically designed to create and manipulate closed geometric shapes and can be used interchangeably with the BOUNDARY command to define areas for filling, hatching, and other modifications. Regions are two-dimensional entities that are represented as areas, allowing for more complex shapes and operations than simple lines or curves. Polylines, on the other hand, are a series of connected segments that can be linear or curved, forming a continuous boundary. These characteristics make regions and polylines suitable and valid object types for the BOUNDARY command, as they can clearly define enclosed spaces. In contrast, other options involve object types that either do not form enclosed areas or do not meet the criteria for the BOUNDARY command. For instance, curves, circles, lines, and arcs can be components of boundaries but do not independently meet the requirement to define a closed boundary in the context of the BOUNDARY command. Rectangles and polygons are more specific geometric shapes but are not standalone object types in the same