Interview Problem: Find Missing Number in a sorted array (Problem1.java)

Strengths:

• Correct binary search approach for finding the missing number
• Proper use of loop termination condition (R - L) > 1
• Correct handling of index comparisons

Areas for Improvement:

1. Critical Bug: Typo in method name - searrch (three r's) vs search (called in main). This causes a compilation error.
2. Formatting: Code lacks proper indentation and spacing, making it harder to read.
3. Descriptive Names: Variable names like L, R, mid are acceptable but could be more descriptive (e.g., left, right).
4. Comments: No comments explaining the logic, which would help understanding.
5. Input Flexibility: Unlike the reference solution, this hardcodes the test array. Consider making it more flexible.

Recommended Fix:
Rename searrch to search to fix the compilation error.

VERDICT: NEEDS_IMPROVEMENT

Interview Problem: Design Min Heap

1. Wrong Problem: The submitted solution solves a different problem (finding missing number in sorted array) rather than implementing a Min Heap as specified in the problem statement.

2. Syntax Errors: The function is named searrch but called as search in main, which would cause a compilation error.

3. Missing Required Operations: The problem requires implementing getMin(), extractMin(), and insert() operations for a Min Heap - none of which are present in this solution.

4. No Heap Implementation: There's no heap array, no parent/child index calculations, no heapify logic, or any of the core Min Heap operations.

5. What to Do: To improve, the student needs to:

   • Read the problem carefully and understand what is being asked
   • Implement a complete binary tree structure using an array
   • Implement helper methods for parent, left child, right child indices
   • Implement the insert() method with upward bubbling (sift-up)
   • Implement the extractMin() method with downward bubbling (sift-down/heapify)
   • Include proper error handling for edge cases (empty heap, full heap)

VERDICT: NEEDS_IMPROVEMENT