LIFO is the term related to queue. It is called Last In First Out.
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A circular queue is similar to the normal queue with the difference that queue is circular queue ; that is pointer rear can point to beginning of the queue when it reaches at the end of the queue. Advantage of this type of queue is that empty location let due to deletion of elements using front pointer can again be filled using rear pointer. There are 2 conditions for queue full if queue is implemented using arrays. First condition is Front = 1 and Rear = N Second condition is Front = Rear + 1
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"Numerical" means "related to numbers".
Oh, dude, "queue" has one syllable. It's like a VIP word in the syllable club, just chilling with its single syllable while other words are out there trying too hard with their multiple syllables. Keep it simple, right?