ITPEC IP October 2020 Question 5
ITPEC IP October 2020 — Question 5 of 100
A queue is first in, first out, so the second value retrieved is 27. After enqueuing 33, 27, 12, and then 45, the queue order from front to rear is 33, 27, 12, 45. The first dequeue removes 33 and the second removes 27.
Answer (b)
Why not others:
- 12 is the third item and would be retrieved third
- 33 is retrieved first
- 45 was enqueued last and would be retrieved fourth
Key rule: A queue uses FIFO order: enqueue adds at the rear, and dequeue removes from the front.
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