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A data structure in which elements can be inserted or deleted at/from both ends but not in the middle is?

(a) Queue

(b) Circular queue

(c) Dequeue

(d) Priority queue

Asked question is from Queue Operations in portion Abstract Data Types of Data Structures & Algorithms I

The question was asked in examination.

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Best answer
Correct answer is (c) Dequeue

The best I can explain: In dequeuer, we can insert or delete elements from both the ends. In queue, we will follow first in first out principle for insertion and deletion of elements. Element with least priority will be deleted in a priority queue.

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