Dhruv Research Operations Specialist Interview Questions and Answers

Proficient in English with strong communication skills.

• Native English speaker with excellent grammar and vocabulary

• Experience writing reports, emails, and presentations in English

• Comfortable speaking in English in professional settings

• Ability to effectively communicate complex ideas in English

Database queries are requests for data or information from a database using a specific query language.

• Queries are written in languages like SQL (Structured Query Language).

• Example: 'SELECT * FROM patients WHERE age > 30;' retrieves all patients older than 30.

• Queries can be used to insert, update, or delete data, e.g., 'INSERT INTO patients (name, age) VALUES ('John', 45);'.

• They can filter, sort, and aggregate data, ...read more

API testing evaluates the functionality, reliability, and performance of application programming interfaces.

• Verifies API endpoints for expected responses, e.g., GET /users should return a list of users.

• Checks authentication and authorization, ensuring only valid users can access certain endpoints.

• Tests error handling by sending invalid requests and verifying appropriate error messages are returned.

• Measures performance ...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 th

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 ...read more

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 ov...read more