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What is a circular queue? Why is it better than a normal queue? Give some practical Examples of usage of circular queue.

Asked by: Interview Candidate | Asked on: Oct 1st, 2003
Showing Answers 1 - 2 of 2 Answers

Answered On : Apr 11th, 2008

View all answers by payelmisty

Circular queue is a bounded queue which implements arrays.It is beter than a normal queue because in this we can effectively utilise the memory space.If we have a normal queue and have deleted some elements from there then empty space is created there and even if the queue has empty cells then also we cannot insert any new element because the insertion has to be done from one side only(i.e rear or tail) and deletion has to be done from another side(i.e front or head).But in case of circular queue the front and rear are adjacent to each other.

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Answered On : Aug 27th, 2008

View all answers by montaipuchu

In case of a ordinary queue, the insertion take place from the front end and the deletion take place  from the rear end. In the case of deletion from the front end, the datas are deleted but the space of the queue is not utilized for the further storage. So this problem is solved in case of a circular queue. Even if the rear is full but there is space at the front end, then the data can be stored in the front end until the queue overflows.

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