Q. PriorityQueue is thread safe.

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Q. What is difference between dequeue() and peek() function of java?

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Q. What is the difference between Queue and Stack?

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Q. What are the use of front and rear pointers in CircularQueue implementation?

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Q. What is the correct method used to insert and delete items from the queue?

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Q. Which data structure is used in Breadth First Traversal of a graph?

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Q. Where does a new element be inserted in linked list implementation of a queue?

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Q. If the size of the array used to implement a circular queue is MAX_SIZE. How rear moves to traverse inorder to insert an element in the queue?

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Q. Which of these standard collection classes implements all the standard functions on list data structure?

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Q. Which of this method is used to make all elements of an equal to specified value?

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Q. Which of these method of Array class is used sort an array or its subset?

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Q. Which of these methods can be used to search an element in a list?

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Q. Which of these interface declares core method that all collections will have?

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Q. Which of these interface handle sequences?

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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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