"Pre-course 1 done"

[Sahithipsl470]

No description provided.

[super30admin]

The student has provided solutions for multiple exercises involving stack and linked list implementations in both Java and Python. Here's a detailed evaluation:

Strengths:

1. Correctness: The implementations for stack (using array and linked list) and linked list operations are generally correct and follow standard approaches.
2. Time Complexity: The student has correctly identified and commented the time complexities for each operation.
3. Space Complexity: The space complexity analysis is accurate and well-documented.
4. Code Structure: The code is well-organized with appropriate class structures and methods.
5. Comments: The student has provided clear comments explaining their approach and logic.

Areas for Improvement:

1. Error Handling: In the stack implementations (Exercise_1 and Exercise_2), returning 0 for underflow cases might not be ideal. Consider throwing exceptions or returning null/None for better error handling.
2. Consistency: In Exercise_1.py, the stack implementation uses a list (dynamic array) instead of a fixed-size array as in the Java version. The approaches should be consistent.
3. Edge Cases: The linked list implementation (Exercise_3) could benefit from handling more edge cases, such as removing from an empty list or inserting at specific positions.
4. Code Duplication: Some methods like isEmpty() and peek() have similar implementations across files. Consider creating utility functions or inheritance to reduce duplication.
5. Python Specifics: In Exercise_1.py, the show() method returns the internal list directly, which breaks encapsulation. Consider returning a copy or a string representation instead.

Overall, the solutions are well-thought-out and demonstrate a good understanding of the data structures. The main areas for improvement are in error handling and consistency between implementations.