Q. Consider these functions:
push() : push an element into the stack

pop() : pop the top-of-the-stack element

top() : returns the item stored in top-of-the-stack-node

What will be the output after performing these sequence of operations

push(20);

push(4);

top();

pop();

pop();

pop();

push(5);

top();

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Q. Which of the following data structures can be used for parentheses matching?

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Q. Minimum number of queues to implement stack is ___________

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Q. Which of the following properties is associated with a queue?

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Q. In a circular queue, how do you increment the rear end of the queue?

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Q. What is the term for inserting into a full queue known as?

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Q. What is the time complexity of enqueue operation?

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Q. What is the need for a circular queue?

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Q. What is the space complexity of a linear queue having n elements?

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Q. In linked list implementation of queue, if only front pointer is maintained, which of the following operation take worst case linear time?

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Q. In linked list implementation of a queue, where does a new element be inserted?

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Q. In linked list implementation of a queue, front and rear pointers are tracked. Which of these pointers will change during an insertion into a NONEMPTY queue?

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Q. In linked list implementation of a queue, front and rear pointers are tracked. Which of these pointers will change during an insertion into EMPTY queue?

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Q. In case of insertion into a linked queue, a node borrowed from the __________ list is inserted in the queue.

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Q. In linked list implementation of a queue, from where is the item deleted?

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Q. In linked list implementation of a queue, the important condition for a queue to be empty is?

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Q. The essential condition which is checked before insertion in a linked queue is?

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Q. The essential condition which is checked before deletion in a linked queue is?

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Q. With what data structure can a priority queue be implemented?

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Q. Which of the following is not an application of priority queue?

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