PreCourse_1 Done

[PremalSamale]

No description provided.

[super30admin]

1. Exercise_1.java:

   • Correctness: The stack implementation has several issues. The constructor incorrectly assigns capacity = MAX instead of using the parameter. The push method has a syntax error (if(top = capcity -1) should be if(top == capacity -1)). The capacity field is declared but not used properly.
   • Time Complexity: Correctly identified as O(1) for all operations.
   • Space Complexity: Correctly identified as O(1) for the stack operations.
   • Code Quality: The code has syntax errors and logical issues. The constructor should use the parameter capacity instead of hardcoding MAX. The isEmpty method can be simplified to return top == -1;.
   • Efficiency: The implementation could be more efficient by properly utilizing the capacity parameter.

2. Exercise_2.java:

   • Correctness: The stack implementation has issues. The push method incorrectly assigns top.next = newNode before updating top. This will cause the stack to lose elements. The pop method uses Node instead of StackNode.
   • Time Complexity: Correctly identified as O(1) for all operations.
   • Space Complexity: Correctly identified as O(1) for the stack operations.
   • Code Quality: The code has syntax errors (return true missing semicolon). The isEmpty method can be simplified to return top == null;. The push method logic is incorrect.
   • Efficiency: The implementation could be more efficient by fixing the push method logic.

3. Exercise_3.java:

   • Correctness: The linked list implementation is mostly correct. The insert method correctly handles both empty and non-empty lists.
   • Time Complexity: Correctly identified as O(n) for insertion (due to traversal to the end).
   • Space Complexity: Correctly identified as O(n) for the linked list.
   • Code Quality: The code is well-structured and readable. The printList method could be more concise by removing the redundant print statement.
   • Efficiency: The implementation is efficient for a singly linked list.