Mastering Java: The Ultimate Quiz for 'Thinking in Java'

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Mastering Java: The Ultimate Quiz for 'Thinking in Java'. Dive deep into Java with multiple-choice questions. Challenge yourself with quiz questions designed to test and improve your understanding of the 'Thinking in Java' book. Get ready for your exam!

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What is the purpose of the redraw() method in the SineDraw class?

To reset the slider value
To draw a rectangle
To update the UI representation of the sine wave
To clear the canvas

The correct answer is: To update the UI representation of the sine wave

The redraw() method in the SineDraw class updates the UI representation of the sine wave. This means that the method is responsible for dynamically adjusting the visual display of the sine wave as the slider value is changed. Option A is incorrect because the redraw() method does not reset the slider value, it only updates the UI. Option B is incorrect because the method is not responsible for drawing a rectangle. Option D is incorrect because the method does not clear the canvas, it only updates the UI. In conclusion, the purpose of the redraw() method is to update the UI representation of the sine wave, making option C the correct answer.