What is the average time complexity of accessing an element in a queue implement

Practice Questions

Q1
What is the average time complexity of accessing an element in a queue implemented using a linked list?
  1. O(1)
  2. O(n)
  3. O(log n)
  4. O(n^2)

Questions & Step-by-Step Solutions

What is the average time complexity of accessing an element in a queue implemented using a linked list?
  • 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 that a queue can be implemented using a linked list. In this implementation, each element (node) points to the next element.
  • Step 3: Identify the front of the queue. In a linked list implementation, the front of the queue is the head of the linked list.
  • Step 4: Accessing the front element means you are looking at the head of the linked list.
  • Step 5: Since you can directly access the head of the linked list without needing to traverse any other elements, this operation takes constant time.
  • Step 6: Therefore, the average time complexity for accessing the front element of a queue implemented using a linked list is O(1).
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