What is the space complexity of a queue implemented using a linked list?

Practice Questions

Q1
What is the space complexity of 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 space complexity of 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 linked list is a way to store data where each element (node) points to the next one.
  • Step 3: Realize that in a linked list implementation of a queue, each element in the queue is stored in a separate node of the linked list.
  • Step 4: Count the number of elements in the queue. Let's call this number 'n'.
  • Step 5: Understand that each node in the linked list requires some space to store the data and a pointer to the next node.
  • Step 6: Since there are 'n' nodes for 'n' elements in the queue, the total space used is proportional to 'n'.
  • Step 7: Conclude that the space complexity, which measures how much space is used as the number of elements grows, is O(n).
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