Recall & Review
beginner
What does the enqueue operation do in a queue?
It adds an element to the back (end) of the queue, following the First-In-First-Out (FIFO) rule.
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beginner
In a queue, where is the new element added during an enqueue operation?
The new element is added at the rear (end) of the queue.
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beginner
Why is the enqueue operation important in queue data structure?
Because it allows new data to enter the queue, maintaining the order of processing.
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intermediate
What happens if you try to enqueue an element when the queue is full (in a fixed-size queue)?
The enqueue operation fails or raises an error because there is no space to add a new element.
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beginner
Show the state of the queue after enqueueing 5 into an empty queue.
Queue state: 5 -> null (5 is the only element at the front and rear).
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Where does the enqueue operation add an element in a queue?
✗ Incorrect
Enqueue always adds an element at the rear of the queue.
What is the order rule that a queue follows?
✗ Incorrect
Queue follows FIFO, meaning the first element added is the first to be removed.
What happens if you enqueue an element in a full fixed-size queue?
✗ Incorrect
In a fixed-size queue, enqueue fails if there is no space left.
If a queue is empty, what will be the state after enqueueing element 10?
✗ Incorrect
After enqueueing 10, the queue has one element: 10 -> null.
Which operation is the opposite of enqueue in a queue?
✗ Incorrect
Dequeue removes an element from the front, opposite of enqueue which adds at the rear.
Explain the enqueue operation in a queue and describe what happens to the queue's state after enqueueing an element.
Think about where new elements go and how the order is kept.
You got /3 concepts.
What issues can arise when performing enqueue on a fixed-size queue and how can they be handled?
Consider what happens when no space is left.
You got /3 concepts.