User Coordinate System (UCS): by default, the UCS icon appears at which coordinate on the AutoCAD grid when a new file is created?

Introduction / Context:
The UCS defines the working X, Y, and Z directions in AutoCAD. Knowing the origin helps with precise modeling, snapping, and scripting coordinates for parametric or programmatic geometry creation.

Given Data / Assumptions:

• Default template or newly created drawing.
• UCS icon is visible.
• No custom UCS has been set yet.

Concept / Approach:
At startup, the World Coordinate System (WCS) is active, with origin at 0,0,0. The UCS icon sits at that origin unless moved or UCS is redefined for task convenience.

Step-by-Step Solution:

Verification / Alternative check:
Run the UCS command and choose World to reset; the icon returns to the origin at 0,0,0. Query the position by snapping to the icon’s location and checking coordinates.

Why Other Options Are Wrong:

• 10,10,10 / 20,20,20: Arbitrary coordinates; not the default origin.
• None of the above: Incorrect because 0,0,0 is the standard default.

Common Pitfalls:
Users may think the icon’s screen location is the origin; zoom level and grid limits can shift its appearance, but its coordinate is still 0,0,0 unless changed.

Final Answer:
0,0,0