What is the time complexity of a queue's enqueue operation?

Practice Questions

Q1
What is the time complexity of a queue's enqueue operation?
  1. O(1)
  2. O(n)
  3. O(log n)
  4. O(n^2)

Questions & Step-by-Step Solutions

What is the time complexity of a queue's enqueue operation?
  • Step 1: Understand what a queue is. A queue is a data structure that follows the First In First Out (FIFO) principle.
  • Step 2: Know what the enqueue operation is. Enqueue means adding an item to the back of the queue.
  • Step 3: Realize that adding an item to the back of the queue does not depend on the number of items already in the queue.
  • Step 4: Since the time it takes to add an item is the same regardless of how many items are in the queue, we say it takes constant time.
  • Step 5: In computer science, constant time is represented as O(1).
  • Step 6: Therefore, the time complexity of the enqueue operation in a queue is O(1).
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