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

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Dive into the depths of Java with our quiz based on "Thinking in Java, Fourth Edition" by Bruce Eckel. Test your knowledge, solidify concepts, and prepare for certification with challenging questions and insightful feedback.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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How does the SineDraw class adjust the frequency of the sine wave visually?

Using a Text input for frequency values
Through direct manipulation of the canvas
Utilizing a slider widget for user input
Employing buttons to increase or decrease frequency

The correct answer is: Utilizing a slider widget for user input

The SineDraw class utilizes a slider widget for user input in order to adjust the frequency of the sine wave visually. This means that users can easily change the frequency by moving the slider, rather than having to input specific numerical values. Options A, B, and D are incorrect because they do not mention the use of a slider widget, which is the main feature of the SineDraw class for adjusting frequency. Option A may also imply that the user needs to input the correct frequency value, which can be more time-consuming and prone to error compared to simply sliding a slider to adjust the frequency. Option B is incorrect because it only mentions direct manipulation of the canvas, which is a general function of a drawing class and does not specifically address the frequency adjustment. Option D is incorrect because it mentions the use of buttons, which is a less intuitive and precise method compared to using a slider.