Pre-course - 1 complete

[KartavyaBhatt]

No description provided.

[super30admin]

The student has submitted solutions for three different exercises, each implementing a different data structure: a stack using an array, a stack using a linked list, and a singly-linked list. Here's a detailed evaluation:

1. Exercise_1.py (Stack using Array):

   • Correctness: The implementation correctly follows stack operations (push, pop, peek, etc.) using an array. The checks for stack being full or empty are correctly implemented.
   • Time Complexity: The student correctly identifies O(1) time complexity for all operations.
   • Space Complexity: Correctly identified as O(N).
   • Code Quality: The code is clean and well-commented. The use of maxLen and length for boundary checks is a good practice.
   • Efficiency: The solution is efficient. One minor improvement could be to raise exceptions (e.g., IndexError) instead of returning strings for stack full/empty conditions.

2. Exercise_2.py (Stack using Linked List):

   • Correctness: The implementation correctly follows stack operations using a linked list. The push and pop operations are correctly handled.
   • Time Complexity: Correctly identified as O(1) for push and pop.
   • Space Complexity: Correctly identified as O(N).
   • Code Quality: The code is well-structured and commented. The use of docstrings (''') is a good practice.
   • Efficiency: The solution is efficient. The student could consider adding a size method to track the stack size, similar to Exercise_1.py.

3. Exercise_3.py (Singly-Linked List):

   • Correctness: The implementation correctly follows linked list operations (append, find, remove). The edge cases (e.g., removing the head node) are handled well.
   • Time Complexity: Correctly identified as O(N) for append, find, and remove.
   • Space Complexity: Correctly identified as O(N).
   • Code Quality: The code is well-commented and structured. The show method is a nice addition for debugging.
   • Efficiency: The solution is efficient. One improvement could be to add a tail pointer to reduce the O(N) time complexity of append to O(1).

General Feedback:

• The student demonstrates a good understanding of data structures and their operations.
• The code is well-commented and follows best practices.
• The student could improve by handling edge cases more robustly (e.g., raising exceptions instead of returning strings or None).
• Consistency in method naming (e.g., show vs. __str__) could be improved.