Lucknow Hospital Interview Questions and Answers

We are using the Random Forest model for classification.

• Random Forest model is an ensemble learning method that builds multiple decision trees and merges them together to get a more accurate and stable prediction.

• It is widely used for classification tasks due to its ability to handle large datasets with high dimensionality.

• Random Forest is a popular choice in machine learning for its robustness and ability to reduce overfitting.

• Example: Random Forest is being used to classify...read more

VLOOKUP in Excel is used to search for a value in a table and return a corresponding value from another column.

• Use vlookup to find specific data in a large dataset

• Use vlookup to merge data from different tables

• Use vlookup to create dynamic reports by pulling data from multiple sources

• Example: =VLOOKUP(A2, Sheet2!A:B, 2, FALSE) - this formula searches for the value in cell A2 in the first column of Sheet2 and returns the corresponding value from the second column

Joins in SQL are used to combine rows from two or more tables based on a related column between them.

• Joins are used to retrieve data from multiple tables based on a related column

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• INNER JOIN returns rows when there is at least one match in both tables

• LEFT JOIN returns all rows from the left table and the matched rows from the right table

• RIGHT JOIN returns all rows from the right table and the matched...read more

SQL stored procedures are precompiled SQL statements that can be saved and reused in a database.

• Stored procedures are used to encapsulate logic in the database for better performance and security.

• They can accept input parameters and return output parameters.

• Stored procedures can be called from application code to execute complex database operations.

• Example: CREATE PROCEDURE GetEmployeeDetails AS SELECT * FROM Employees WHERE Department = 'IT';

Truncate is a DDL command that removes all records from a table, while delete is a DML command that removes specific records.

• Truncate is faster than delete as it does not log individual row deletions.

• Truncate resets the identity seed of the table, while delete does not.

• Truncate cannot be rolled back, while delete can be rolled back using a transaction.

• Truncate does not fire triggers, while delete does.

• Truncate is used to quickly remove all records from a table, while delete i...read more

Key Performance Indicators (KPIs) that impact the brand include customer satisfaction, retention rate, and Net Promoter Score (NPS).

• Customer satisfaction: Measure of how happy customers are with the product/service.

• Retention rate: Percentage of customers who continue to use the product/service over time.

• Net Promoter Score (NPS): Indicator of customer loyalty and likelihood to recommend the product/service to others.