PreCourse-1 Completed

[sree0018]

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[sree0018]

Having Some doubts Space Complexity In the Implementation Of Linked List.

[super30admin]

1. Correctness:

   • Stack implementation (Exercise_1.java) correctly handles push, pop, peek operations with stack overflow/underflow checks.
   • LinkedList implementation correctly handles insertion and printing of nodes.
   • StackAsLinkedList implementation correctly handles stack operations using linked list nodes.

2. Time Complexity:

   • Stack operations (push, pop, peek) are O(1) as claimed.
   • LinkedList insertion is O(n) as claimed since it traverses to the end.
   • StackAsLinkedList operations are O(1) as claimed.

3. Space Complexity:

   • All implementations correctly claim O(1) space complexity for operations (except LinkedList insertion which uses O(n) space overall for n elements).

4. Code Quality:

   • Good use of comments explaining time/space complexity.
   • Consistent indentation and formatting.
   • Could improve by:
     • Adding more comments explaining the logic in methods.
     • Using more descriptive variable names (e.g., 'a' in Stack could be 'stackArray').
     • Adding null checks in LinkedList printList method.
     • Making Node classes private where appropriate.

5. Efficiency:

   • All implementations are efficient for their respective data structures.
   • One optimization could be to maintain a tail pointer in LinkedList to make insertions O(1).