ITPEC IP October 2019 Question 6
ITPEC IP October 2019 — Question 6 of 100
The second removal returns 1. A queue is first-in, first-out, so after inserting 8, 1, 6, and 3, removal proceeds in the same order: the first removal returns 8 and the second returns 1.
Answer (a)
Why not others:
- 3 is the last value inserted and would be removed fourth
- 6 would be removed third
- 8 is returned by the first removal, not the second
Key rule: A FIFO queue inserts at the rear and removes from the front; the earliest enqueued remaining value is always removed next.
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