Queue
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Internal
Overview
Overview
A queue is a dynamic set in which the the DELETE operation, which does not have any argument, removes the oldest element in the queue. The queue implements the first-in-first-out, or FIFO, policy. Also see Stack. The queue has a head The INSERT operation for a queue is called ENQUEUE. The DELETE operation is called DEQUEUE. If the queue contains no elements it is said to be empty. If POP() operation is invoked on an empty stack, we say that the stack underflows. If PUSH() operation is called on a full stack, we say that the stack overflows.
Difference between list and queue.