Capgemini Java Developer 4 yrs interview Questions and Answers L2 round #capgemini

Summary

The conversation revolves around a job interview for a Java developer role. The interviewer asks technical questions regarding Java, Spring Boot, microservices, and related technologies. The candidate discusses their experience with Java 8, Lambda functions, stream APIs, and their involvement in API development using Spring Boot. They also address scenarios on sorting employee data, writing custom queries, and handling API requests. The discussion extends to testing methods, such as JUnit, and the candidate expresses interest in learning more about microservices architecture.

Takeaways

• 😀 The candidate is a Java developer with 4.1 years of experience.
• 📍 The candidate is currently based in Gorakpur, UP, and willing to relocate to Bangalore or Chennai for work.
• 💻 The candidate has experience in banking and healthcare domains, working with Java, Spring Boot, and MySQL.
• 🔧 The candidate is proficient in using Java 8 features such as Lambda expressions, Stream API, and Optional class.
• 📝 The candidate is asked to write Java code to filter employees based on location and sort a list of employees by name and age.
• 🛠 The candidate discusses the use of functional interfaces like Predicate, Consumer, and Supplier in Java.
• 📈 The candidate is familiar with Spring Data JPA and its advantages over traditional Repositories.
• 🔄 The candidate explains how to design an API to fetch the first five records from an employee table using Spring Boot.
• 🌐 The candidate is aware of the concepts of microservices and the shift from monolithic architectures.
• 📊 The candidate uses Actuator for monitoring and managing applications.
• 📝 The candidate tests applications using JUnit 5.

Q & A

What is the job requirement mentioned in the transcript?

The job requires a Java developer with a good understanding of Java, Spring Boot, and microservices. Hands-on experience with CI/CD is an added advantage. The candidate should be willing to work in a hybrid model from Bangalore or Chennai.

What is the candidate's current location and are they willing to relocate?

The candidate is currently in Gorakpur, UP, but is willing to relocate. They have previously lived in Bangalore and will manage the relocation.

What technologies has the candidate worked with in their past projects?

The candidate has worked with Java, Spring Boot, Hubs framework for the front end, MySQL for the database, and has experience with APIs. They have also used Java 8 features such as Lambda expressions and Stream API.

What is the project methodology used by the candidate's current project?

The candidate's current project uses the Agile methodology with Sprints lasting 15 days.

What Java version has the candidate used and what features are they familiar with?

The candidate has used Java 8 and is familiar with Lambda functions, Function Interface, Stream API, and the Optional class.

How does the candidate approach writing code for filtering employees based on location?

The candidate would use Java to filter the employee list based on the location, specifically filtering for employees from Chennai.

What is the scenario given to the candidate for sorting a list of employees?

The candidate is asked to sort a list of employees by their names, and if names match, then sort by their age.

Can one functional interface inherit another, according to the candidate?

Yes, one functional interface can inherit another, but it will have more than one abstract method if it does so.

How does the candidate plan to design an API to get the first five records from an employee table?

The candidate would create a Spring Boot project, add MySQL driver and Spring Data JPA dependencies, configure the property file for database connection, define the entity class, create a service layer, and use a custom finder method in the repository to fetch the first five records.

What is the difference between a JPA repository and a traditional repository according to the candidate?

The candidate mentions that JPA repositories provide additional functionality like paging and sorting, which are not available in traditional repositories.

How does the candidate handle different output formats (JSON and XML) for an API?

The candidate suggests using the @ResponseBody annotation to return the appropriate format, with JSON being the default and XML handled by using a different response body configuration.

How has the candidate used Spring Boot Actuator in their projects?

The candidate has used Spring Boot Actuator for monitoring and managing the health of their deployed applications, checking for created beans, loggers, and heap usage.