Q. Which of this interface must contain a unique element?

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Q. Which of these is a Basic interface that all other interface inherits?

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Q. Which of these is static variable defined in Collections?

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Q. Which class is used to generate random number?

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Q. Which method is used to generate boolean random values in java?

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

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Q. Random is a final class?

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

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

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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. What would be the output of following code snippet?

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

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Q. Math.random() guarantees uniqueness?

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

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

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

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Q. Which of these class can generate pseudorandom numbers?

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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 is a method can generate a boolean output?

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Q. What is the use of Observable class?

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

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