Queue · Class 12 · CBSE · Science Computer Science
A queue currently contains [12, 18, 25], where 12 is at the front. After one dequeue, one enqueue of 31, and one more dequeue, which list represents…
Practice question from Queue (Class 12 · CBSE · Science Computer Science), with the correct answer and a step-by-step solution.
easy · MCQ · Q-AF4DF7
A queue currently contains [12, 18, 25], where 12 is at the front. After one dequeue, one enqueue of 31, and one more dequeue, which list represents the queue from front to rear?
- A.[12, 18, 25, 31]
- B.[18, 25, 31]
- C.[25, 31]Correct answer
- D.[31, 25]
Solution
The first dequeue removes 12, and the enqueue adds 31 at the rear. The second dequeue removes 18, leaving [25, 31].
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