Completed Pandas5

[DhruvParashar246]

No description provided.

[super30admin]

The student has provided solutions to two different problems. Let's evaluate each one separately.

1. Department Highest Salary:

• Correctness: The solution correctly merges the employee and department tables, finds the maximum salary per department, and filters employees who have that maximum salary. The output columns are renamed appropriately.
• Time Complexity: O(n) for the merge operation and O(n) for the groupby operation, making it O(n) overall where n is the number of employees.
• Space Complexity: O(n) for storing the merged DataFrame.
• Code Quality: The code is clean and readable. The use of transform() is efficient. One improvement could be to add comments explaining the steps.
• Efficiency: The solution is efficient. No major optimizations needed.

2. Rank Scores:

• Correctness: The solution correctly ranks the scores using dense ranking and sorts them in descending order.
• Time Complexity: O(n log n) for the ranking and sorting operations.
• Space Complexity: O(n) for storing the ranks.
• Code Quality: The code is concise and readable. The method='dense' parameter is correctly used for the ranking.
• Efficiency: The solution is efficient. One minor improvement could be to use inplace=True for the rank operation to avoid creating a new column.

General feedback:

• Both solutions are correct and efficient.
• The code is well-structured and follows pandas best practices.
• Adding comments would improve readability and maintainability.
• The student could consider edge cases like empty DataFrames or ties in scores.