Completed - PreCourse-1

[lalitha7571]

No description provided.

[super30admin]

The student's solution is incomplete and lacks implementation for key methods of a stack data structure. Here are the specific observations:

1. Correctness: The code structure is correct for a stack implementation using an array, but none of the methods (isEmpty, push, pop, peek) are implemented. The constructor is also empty. Without these implementations, the stack won't function.

2. Time Complexity: Not applicable since methods aren't implemented, but properly implemented stack operations should be O(1) for push, pop, peek, and isEmpty.

3. Space Complexity: The space complexity is correctly set as O(n) where n is MAX (1000), but this isn't mentioned in the code comments as requested in the problem description.

4. Code Quality:

   • Good structure with proper class separation
   • Missing required time and space complexity comments at the top
   • Method stubs are present but unimplemented
   • Follows Java naming conventions
   • Could benefit from more comments explaining the implementation

5. Efficiency:

   • The MAX size is fixed at 1000 which could be made configurable
   • No error handling in the current stubs
   • Missing boundary checks in method implementations

Key improvements needed:

• Implement all stack operations (push, pop, peek, isEmpty)
• Add proper error handling (stack overflow/underflow)
• Include time and space complexity comments
• Consider making stack size configurable
• Add method-level comments explaining functionality