Queue · Class 12 · CBSE · Science Computer Science
Explain how enqueue and dequeue operations can be implemented for a queue using a Python list. Also state what should happen when dequeue is attempte…
Practice question from Queue (Class 12 · CBSE · Science Computer Science), with the correct answer and a step-by-step solution.
medium · Subjective · Q-01C3CF
Explain how enqueue and dequeue operations can be implemented for a queue using a Python list. Also state what should happen when dequeue is attempted on an empty queue.
Answer: Enqueue can be implemented using append(), which inserts the new element at the rear of the list, while dequeue can be implemented using pop(0), which removes and returns the front element. If dequeue is attempted on an empty queue, the program should report queue underflow or handle the condition without attempting the removal.
Solution
append() adds an item at the rear, and pop(0) removes the item at the front, maintaining FIFO order. An empty queue must be checked before dequeue to prevent an invalid removal.
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