Completed Pre Course 1

[rbhargav0104]

No description provided.

[super30admin]

The student's solution demonstrates a good understanding of basic data structures (stack and linked list) and their implementations. Here's a detailed evaluation:

1. Correctness:

• Exercise_1 (Array-based Stack): Correctly implements stack operations (push, pop, peek, isEmpty) with proper boundary checks.
• Exercise_2 (Linked List-based Stack): Correctly implements stack operations using linked nodes.
• Exercise_3 (Linked List operations): Correctly implements all required linked list operations (push, insertAfter, append).

2. Time Complexity:

• Exercise_1: Correctly noted as O(1) for all operations.
• Exercise_2: All operations are O(1) except for potential memory allocation time.
• Exercise_3: push() and insertAfter() are O(1), append() is O(n) - this could be mentioned in comments.

3. Space Complexity:

• Exercise_1: Correctly noted as O(1) for fixed array size.
• Exercise_2: O(n) for n elements - this could be mentioned.
• Exercise_3: O(n) for n nodes - this could be mentioned.

4. Code Quality:

• Good use of comments and structure.
• Consistent indentation and formatting.
• Could improve by:
  • Adding comments explaining time/space complexity for each exercise
  • Using more descriptive variable names (e.g., 'temp' could be 'currentNode')
  • Adding error handling for edge cases (e.g., NULL checks)

5. Efficiency:

• All implementations are efficient for their respective data structures.
• For Exercise_3, append() could be optimized to O(1) by maintaining a tail pointer.

Additional suggestions:

• Include input validation in stack operations.
• Consider using nullptr instead of NULL for modern C++.
• The configuration files (.vscode) contain duplicate entries that could be cleaned up.