BHEL Interview Questions and Answers

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 hands is 90 degrees.

CloudFormation and Terraform are both infrastructure as code tools, while blue-green release management is a deployment strategy.

• CloudFormation is a service provided by AWS for creating and managing AWS resources using templates written in JSON or YAML.

• Terraform is an open-source tool by HashiCorp that allows you to define and provision infrastructure using a declarative configuration language.

• Blue-green deployment is a strategy where you have two identical production environ...read more

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 containers. They include the application code, runtime, libraries, a...read more

Tuples are immutable sequences of elements. A string can be converted to a tuple using the tuple() function.

• Tuples are similar to lists but are immutable

• Elements of a tuple are enclosed in parentheses ()

• A string can be converted to a tuple using the tuple() function

• Each character in the string becomes an element in the tuple

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')

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-level triggers.

• For example, if a trigger tries to update a table t...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 consistent in your interactions with managers.

• Encourage open commu...read more

Equifax can make profit by offering credit monitoring services, selling data analytics to businesses, and providing identity theft protection.

• Offering credit monitoring services to individuals and businesses

• Selling data analytics to businesses for targeted marketing

• Providing identity theft protection services to consumers

• Charging fees for credit reports and credit scores