Technical Operations Engineer Interview Questions and Answers

Two Factor Authentication (2FA) is a security process that requires users to provide two different authentication factors to verify their identity.

• The two factors can be something the user knows (like a password) and something the user has (like a token or smartphone app)

• 2FA provides an extra layer of security to prevent unauthorized access to sensitive information or systems

• Tokens are often used as the second factor in 2FA because they are physical devices that generate a un...read more

Use SQL query with GROUP BY and HAVING clause to identify and delete duplicate rows.

• Use GROUP BY clause to group rows with same values

• Use HAVING clause to filter out groups with count greater than 1

• Use DELETE statement to remove duplicate rows

I troubleshoot API HTTP requests by analyzing logs, checking network connectivity, and testing with different tools.

• Check server logs for error messages

• Verify network connectivity and firewall settings

• Use tools like Postman or cURL to test requests

• Check API documentation for expected responses

• Collaborate with developers to identify and resolve issues

I am very proficient in Linux and have extensive experience working with various distributions.

• Proficient in command line interface and shell scripting

• Experience with Ubuntu, CentOS, and Red Hat

• Familiarity with package management systems such as apt and yum

• Comfortable with system administration tasks such as user management and file permissions

• Experience with virtualization technologies such as Docker and Kubernetes

Primary key is a unique identifier for each record in a database table.

• Primary key ensures each record in a table is unique

• It can consist of one or multiple columns

• Primary key values cannot be NULL

Left join is a type of join operation in SQL that returns all rows from the left table and matching rows from the right table.

• Left join combines rows from two tables based on a related column between them.

• If there is no match in the right table, NULL values are returned for the columns of the right table.

• Example: SELECT * FROM table1 LEFT JOIN table2 ON table1.id = table2.id;