Done with Precourse 1

[Mukul585]

No description provided.

[super30admin]

The student has implemented three different data structures: a stack using an array, a linked list, and a stack using a linked list. Overall, the implementations are correct and follow standard approaches for these data structures.

Strengths:

1. Correctness: The implementations correctly handle basic operations (push, pop, peek for stacks; insert and print for linked list) and edge cases like stack overflow/underflow.
2. Time Complexity:
   • Stack operations (push, pop, peek) are O(1) for both array and linked list implementations.
   • Linked list insertion is O(n) as it traverses to the end, which is correct for this implementation.
3. Space Complexity:
   • Array stack uses O(n) space where n is MAX (1000).
   • Linked list implementations use O(n) space where n is number of elements.
4. Code Structure: The code is well-organized into appropriate classes and methods.
5. Error Handling: Proper error messages are printed for edge cases like stack underflow/overflow.

Areas for Improvement:

1. Documentation: The code lacks comments explaining time and space complexity at the top of each file as requested in the problem statement.
2. Return Values: In StackAsLinkedList, returning 0 for underflow might be ambiguous (could be confused with a valid zero value). Consider returning -1 or throwing an exception.
3. Testing: The test cases in main() methods are minimal. More comprehensive test cases would be better.
4. Naming: In LinkedList.java, 'list' parameter in methods could be renamed to 'linkedList' for clarity.
5. Encapsulation: The Node classes could be made private since they're implementation details.