Question

How is the concept of "escape" handled in hierarchical State Transition Networks (STNs)?

a.

An arc labeled "escape" is added from every state to the main menu.

b.

An arc labeled "escape" is added from the main menu to every state.

c.

Escape functionality is automatically applied to all states in the hierarchy.

d.

Escape actions are represented using a separate notation, not involving STNs.

Posted under Human Computer Interaction

Answer: (a).An arc labeled "escape" is added from every state to the main menu. Explanation:In hierarchical State Transition Networks (STNs), the concept of "escape" is often handled by adding an arc labeled "escape" from every composite state (submenu) back to the main menu. This allows users to cancel ongoing actions and return to the main menu at any point within the subdialog.

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Q. How is the concept of "escape" handled in hierarchical State Transition Networks (STNs)?

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