precourse 1 Done

[Tejaswini2112]

No description provided.

[super30admin]

The student has implemented three data structures: Stack using Array (Exercise_1.java), Stack using Linked List (StackAsLinkedList.java), and Singly Linked List (LinkedList.java). Here's my evaluation:

Strengths:

1. Correctness: All implementations appear to be functionally correct for basic operations (push, pop, peek, isEmpty).
2. Time Complexity: The student has correctly identified and commented the time complexities for all operations.
3. Space Complexity: The space complexity analysis is accurate and well-documented.
4. Code Structure: The code is well-organized into appropriate classes and methods.
5. Comments: The student has included helpful comments explaining their approach.

Areas for Improvement:

1. Edge Cases: The stack implementations return 0 when empty (pop/peek). It might be better to throw an exception or use Integer (nullable) for clearer error handling.
2. Magic Numbers: The MAX constant in Exercise_1.java is a magic number that could be made configurable.
3. Redundant Code: In isEmpty() methods, the if-else could be simplified to a single return statement.
4. Linked List: The LinkedList implementation could benefit from more operations (delete, search) to be more complete.
5. Testing: More comprehensive test cases would be beneficial to verify edge cases.

Code Quality Notes:

1. Good use of static inner classes where appropriate.
2. Consistent naming conventions.
3. Proper separation of concerns between different data structures.
4. Could improve by adding more JavaDoc comments for methods.