ITPEC IP April 2025 Question 8
ITPEC IP April 2025 — Question 8 of 100
1 — a queue removes values in the same order in which they were inserted.
The enqueue order is 8, 1, 6, 3. With FIFO processing, the first removal returns 8 and the second consecutive removal returns 1. The question asks for the last of those two removed values, so it is 1. Values 6 and 3 remain in the queue.
Answer (a)
Why not others:
- (b) 3 would be removed first by a stack using LIFO, not by a queue
- (c) 6 is the third queued value and would be removed on the third operation
- (d) 8 is the first value removed, not the second and last requested removal
Key rule: A queue is FIFO: enqueue at the rear and dequeue from the front. A stack, by contrast, is LIFO.
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