Equifax Interview Questions and Answers

Inner join returns only the rows that have matching values in both tables, while left join returns all rows from the left table and the matched rows from the right table.

• Inner join: returns rows where there is a match in both tables

• Left join: returns all rows from the left table and the matched rows from the right table

• Example: Inner join - SELECT * FROM table1 INNER JOIN table2 ON table1.id = table2.id

• Example: Le...read more

I have over three years of experience in customer service, focusing on problem-solving and enhancing customer satisfaction.

• Worked at XYZ Retail for 2 years, handling customer inquiries and resolving complaints effectively.

• Implemented a new feedback system that increased customer satisfaction scores by 15%.

• Trained new staff on customer service protocols, improving team efficiency.

• Managed high-volume calls at ABC Ca...read more

Managing managers involves clear communication, setting expectations, providing support, and building trust.

• Establish clear communication channels with managers to ensure alignment on goals and expectations.

• Set clear expectations for performance and provide regular feedback to help managers improve.

• Provide support and resources to help managers succeed in their roles.

• Build trust by being transparent, fair, and con...read more

Mutating tables refer to tables that are being modified by an ongoing transaction.

• Mutating tables occur when a trigger or a stored procedure tries to read or modify a table that is already being modified by the same transaction.

• This can lead to errors like ORA-04091: table is mutating, trigger/function may not see it.

• To avoid mutating table errors, you can use autonomous transactions, compound triggers, or row-lev...read more

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

• Left join is performed using the 'left join' keyword in SQL

• In Python, left join can be performed using the 'merge' function from the pandas library

• Syntax: pd.merge(left_dataframe, right_dataframe, how='left', on='key_column')

• Example: pd.merge(df1, df2, how='left', on='id')

Docker is a platform for developing, shipping, and running applications using containers. Images are templates for containers, multistage builds optimize Dockerfiles, and Terraform state backend stores infrastructure state.

• Docker is a platform that allows developers to package applications and their dependencies into containers for easy deployment and scalability.

• Images are read-only templates used to create conta...read more

The question is asking for the current time and the angles formed by the hour and minute hands on a clock.

• The angle between the hour and minute hands of a clock can be calculated using the formula: angle = |(30*hour - (11/2)*minutes)|

• At 3:00, the angle between the hour and minute hands is 90 degrees.

• At 6:00, the angle between the hour and minute hands is 180 degrees.

• At 9:00, the angle between the hour and minute h...read more