HCL Infosystems Senior Software Engineer Interview Questions and Answers

Spring Boot allows multiple database connections through configuration and using multiple data sources.

• Configure multiple data sources in application.properties or YAML file

• Create separate DataSource and JdbcTemplate beans for each data source

• Use @Qualifier annotation to specify which data source to use in a repository or service

• Example: https://www.baeldung.com/spring-data-jpa-multiple-databases

We use a combination of automated and manual deployment processes to ensure code is deployed efficiently and accurately.

• We have a continuous integration and deployment pipeline set up using tools like Jenkins and Ansible.

• We also have a manual deployment process where a designated team member reviews and approves the deployment.

• We use version control systems like Git to manage code changes and ensure that only approved ...read more

I follow a structured approach starting from requirements gathering to deployment.

• Gather requirements from stakeholders

• Create a design document

• Develop code using agile methodology

• Perform unit testing and code reviews

• Integrate and test the system

• Deploy the system and provide support

• Continuously improve the system based on feedback

Sessions store data on the server side while cookies store data on the client side.

• Sessions store data on the server side, usually in a temporary directory or database

• Cookies store data on the client side, in the form of key-value pairs

• Sessions are more secure as the data is not exposed to the client

• Cookies can be easily manipulated by the client, making them less secure

Redux is a state management library for JavaScript applications. HOC is a pattern to reuse component logic.

• Redux stores the state of an application in a single store object

• Actions are dispatched to update the state in the store

• Reducers are pure functions that take the current state and an action and return a new state

• Higher Order Components (HOC) are functions that take a component and return a new component with addit...read more