What is the space complexity of a linked list?

Practice Questions

Q1
What is the space complexity of 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 linked list?
  • Step 1: Understand what a linked list is. A linked list is a data structure made up of nodes, where each node contains data and a reference (or link) to the next node.
  • Step 2: Recognize that each node in a linked list requires space to store its data and the link to the next node.
  • Step 3: Count the number of nodes in the linked list. If there are 'n' nodes, then there will be 'n' spaces needed for the data and 'n' spaces for the links.
  • Step 4: Combine the space needed for all nodes. Since each node requires a constant amount of space, the total space required is proportional to the number of nodes, which is 'n'.
  • Step 5: Conclude that the space complexity of a linked list is O(n), meaning it grows linearly with the number of elements.
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