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Question

When are modal dialog boxes necessary?

a.

When a major fault has been detected in the system

b.

When multiple tasks need to be performed simultaneously

c.

When users need to detect and correct errors

d.

When users need to have maximum flexibility in the application

Answer: (a).When a major fault has been detected in the system Explanation:Modal dialog boxes are necessary in cases like when a major fault has been detected in the system or for certain kinds of instructional software. They are used in situations where the user's immediate attention is required.

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Q. When are modal dialog boxes necessary?

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