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Question

Why is it impossible to formulate a syntactically incorrect move operation in the pick-up-and-drag style of command in the direct manipulation interface?

a.

Because the desktop metaphor does not support move operations.

b.

Because the user is prevented from making any errors during drag-and-drop operations.

c.

Because direct manipulation interfaces use complex algorithms to avoid errors.

d.

Because drag-and-drop actions inherently create syntactically correct commands.

Answer: (d).Because drag-and-drop actions inherently create syntactically correct commands. Explanation:In the pick-up-and-drag style of command in the direct manipulation interface, it is impossible to formulate a syntactically incorrect move operation because drag-and-drop actions inherently create syntactically correct commands for moving files.

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Q. Why is it impossible to formulate a syntactically incorrect move operation in the pick-up-and-drag style of command in the direct manipulation interface?

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