PreCourse-1 done

[Priygupt13]

No description provided.

[super30admin]

Let's evaluate each file separately:

Exercise_1.java (Array-based Stack):

• Correctness: The implementation correctly handles stack operations (push, pop, peek, isEmpty) with proper edge case checks. The stack overflow check in push() has a minor issue (should be top >= MAX-1 instead of top >= MAX).
• Time Complexity: Correctly stated as O(1) for all operations.
• Space Complexity: Correctly stated as O(N) where N is MAX.
• Code Quality: Well-structured and readable. Good use of comments and consistent formatting.
• Efficiency: The implementation is efficient for a fixed-size stack. The overflow check could be more precise.

Exercise_2.java (Linked List-based Stack):

• Correctness: Correctly implements stack operations using linked list. Properly handles edge cases like empty stack.
• Time Complexity: Correctly stated as O(1) for all operations.
• Space Complexity: Correctly stated as O(N) where N is number of elements.
• Code Quality: Clean and well-organized. Good use of static nested class for StackNode.
• Efficiency: Efficient implementation with constant time operations.

Exercise_3.java (Linked List):

• Correctness: The insert() method works correctly, but printList() has serious issues (infinite loop and incorrect variable usage - 'head' instead of 'currNode').
• Time Complexity: Insert is correctly O(n), but print is incorrectly implemented.
• Space Complexity: Correctly stated as O(1) for insert.
• Code Quality: The printList() method needs significant improvement. Variable naming and logic are confusing.
• Efficiency: The printList() method would be inefficient due to the infinite loop issue.

General Strengths:

• Good documentation of time and space complexity
• Proper handling of edge cases in stack implementations
• Clean code structure in Exercise_1 and Exercise_2

Areas for Improvement:

• Fix the stack overflow check in Exercise_1
• Completely rewrite the printList() method in Exercise_3
• Ensure consistent variable naming (e.g., in Exercise_3 printList())
• Add more comments explaining the logic in complex parts