ITPEC IP October 2021 Question 7
ITPEC IP October 2021 — Question 7 of 100
The second and therefore last removed value is 1. A queue is FIFO, so values leave in the same order they entered. After enqueuing 8, 1, 6, and 3, the first removal returns 8 and the second removal returns 1.
Answer (a)
Why not others:
- 3 and 6 remain behind the first two items
- 8 is removed first, not last among the two removals
Key rule: A queue removes from the front in insertion order; a stack removes from the top in reverse insertion order.
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