FIS Senior Engineer Interview Questions and Answers

Spring Boot is a Java-based framework used for creating standalone, production-grade Spring-based applications.

• Spring Boot simplifies the process of creating Spring applications by providing a set of default configurations.

• It allows for easy setup of Spring projects with minimal configuration.

• Spring Boot includes embedded servers like Tomcat, Jetty, or Undertow, making it easy to deploy applications.

• It provides product...read more

Serialisation is the process of converting an object into a stream of bytes to store or transmit data.

• Serialisation is used to save the state of an object and recreate it when needed.

• It allows objects to be converted into a format that can be easily stored or transmitted.

• Common examples include JSON, XML, and binary serialisation.

• Serialisation is important for data persistence and inter-process communication.

Impact analysis is the process of assessing the potential effects of a change or action on a system or project.

• Identifying the scope of the change and its potential impacts on various components of the system

• Evaluating the risks and benefits associated with the change

• Determining the resources and effort required to implement the change

• Assessing the dependencies and constraints that may affect the change

• Example: Conduct...read more

Bug life cycle is the process of a bug from identification to resolution in software development.

• Bug is identified by testers or users

• Bug is reported in a bug tracking system

• Bug is assigned to a developer

• Developer fixes the bug

• Bug is retested by testers

• If bug is fixed, it is closed. If not, it is reopened

• Bug may go through multiple cycles before resolution

I handle teams by fostering open communication, setting clear goals, providing support, and promoting collaboration.

• Foster open communication within the team to ensure everyone is on the same page

• Set clear goals and expectations to guide the team towards success

• Provide support and resources to help team members overcome challenges

• Promote collaboration and teamwork to leverage the strengths of each team member

• Lead by ex...read more

Sprint ceremonies are regular meetings held during a sprint in Agile methodology to plan, review, and improve the team's work.

• Sprint Planning: At the beginning of the sprint, the team plans the work to be done.

• Daily Standup: Daily check-in meetings to discuss progress, challenges, and plans for the day.

• Sprint Review: Meeting at the end of the sprint to demonstrate completed work to stakeholders.

• Sprint Retrospective: Re...read more

Reverse a string using array of characters

• Create an array of characters from the input string

• Use two pointers to swap characters at opposite ends of the array until they meet

• Join the characters in the array to form the reversed string

Microservices allow for modular, independent services while monolith is a single, cohesive unit.

• Microservices promote scalability and flexibility

• Monoliths are easier to develop and deploy initially

• Microservices can lead to more complex infrastructure and communication between services

• Monoliths can become difficult to maintain and scale as they grow

• Examples: Netflix uses microservices for their streaming platform, while...read more

SQL query to get 3 max salary by group

• Use the RANK() function to rank the salaries within each group

• Filter the results to only include rows where the rank is less than or equal to 3

• Order the results by group and salary in descending order

Implemented CI/CD process using Jenkins for automated builds, tests, and deployments.

• Utilized Jenkins for continuous integration and continuous deployment

• Automated build process triggered by code commits to version control

• Implemented automated testing to ensure code quality

• Deployed code to different environments based on predefined pipelines

Major changes in Spring Boot 3 include support for Java 17, improved performance, and enhanced security features.

• Support for Java 17

• Improved performance optimizations

• Enhanced security features such as OAuth 2.1 support

• Updated dependencies and libraries