Question

What challenge does the notification-based paradigm face when implementing pre-emptive dialogs?

a.

The need for hardware device control.

b.

Centralizing event recognition within the notifier.

c.

Difficulty in invoking callback procedures.

d.

Control flow being out of the application programmer's hands.

Posted under Human Computer Interaction

Answer: (d).Control flow being out of the application programmer's hands. Explanation:In the notification-based paradigm, the control flow is managed by the notifier, which presents a challenge when implementing pre-emptive dialogs. The application programmer must modify callback procedures to recognize the need for pre-emptive dialogs and disregard irrelevant events.

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