ITPEC IP October 2018 Question 7
ITPEC IP October 2018 — Question 7 of 100
The second element dequeued is 27. A queue uses first-in, first-out order. After 45 is enqueued, the queue from front to rear is 33, 27, 12, 45. The first dequeue returns 33, and the second returns 27.
Answer (b)
Why not others:
- 33 is the first element retrieved
- 12 is the third element retrieved
- 45 was added last and would be retrieved fourth
Key rule: In a FIFO queue, insertion occurs at the rear and retrieval occurs at the front.
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