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Question

What is the purpose of the state invariant in schema State for Zdraw?

a.

To define the initial state of the system

b.

To describe the process of shape creation

c.

To ensure consistency in the state components

d.

To specify the location of shapes on the screen

Answer: (c).To ensure consistency in the state components Explanation:The state invariant in schema State ensures consistency by stating that the set of currently selected objects must be contained in the set of created objects in the system.

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Q. What is the purpose of the state invariant in schema State for Zdraw?

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