1. Queues have a head an a tail, also called a front and an end.
   
2. Queue operations are add, remove and peek . add and remove are also referred to as enqueue and dequeue.
   
3. When a queue is implemented with an array, what are the values of the head and tail at initialization?
   
4. The head and tail are updated during queue operations. During which operations are the following indices updated?
   (a) head
   (b) tail
   
5. Explain what is meant by the acronym FIFO.

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