Java Microservice Developer Interview Questions and Answers

I have experience with Jenkins, Git, Docker, and Kubernetes for building and deploying microservices.

• I have used Jenkins for continuous integration and continuous deployment

• I have used Git for version control and managing code changes

• I have used Docker for containerization and packaging of microservices

• I have used Kubernetes for container orchestration and scaling

• I plan a pipeline by defining stages for building, testing, and deploying microservices

• I use tools like Jenkinsfil...read more

SpringBootApplication annotation is used to mark the main class of a Spring Boot application.

• Used to enable auto-configuration and component scanning

• Combines @Configuration, @EnableAutoConfiguration, and @ComponentScan annotations

• Main class annotated with @SpringBootApplication is the entry point of the application

Java HashMap is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values.

• HashMap uses an array of buckets to store key-value pairs.

• The key is hashed to find the index of the bucket where the value is stored.

• If multiple keys hash to the same index, a linked list or balanced tree is used to handle collisions.

• HashMap allows one null key and multiple null values.

• Example: HashMap map = new HashMap<>();

I have been using Java for 5 years in various projects and roles.

• 5 years of experience with Java programming language

• Worked on multiple projects involving Java development

• Experience in developing microservices using Java

• Familiar with Java frameworks like Spring Boot

Design a voting system for a university

• Identify the type of voting system required (e.g. electronic, paper-based)

• Determine the scope of the voting system (e.g. student council elections, faculty senate votes)

• Establish eligibility criteria for voters and candidates

• Create a secure and anonymous voting process

• Implement a system for vote counting and result reporting