Q. Which of these packages contain all the collection classes?

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Q. Which of these package provides the ability to read and write in Zip format?

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Q. Which of these interfaces is implemented by TimerTask class?

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Q. Which of these classes can schedule task for execution in future?

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Q. Which of these methods is called when observed object has changed?

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Q. Which of these methods calls update() method?

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Q. Which of these methods is used to notify observer the change in observed object?

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Q. What is the use of Observable class?

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Q. Which of these is a method can generate a boolean output?

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Q. Which of these method of Locale class can be used to obtain country of operation?

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Q. Which of these class can generate pseudorandom numbers?

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Q. Which of these methods is not a Locale class?

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Q. Which of these class produce objects with respect to geographical locations?

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Q. What is the signature of Math.random() method?

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Q. Math.random() guarantees uniqueness?

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Q. What would be the output of following code snippet?

int a = random.nextInt(7) + 4;

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Q. What would be the output of following code snippet?

int a = random.nextInt(15) + 1;

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Q. How many bits are used for generating random numbers?

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Q. What is the range of numbers returned by Math.random() method?

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Q. Random is a final class?

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