TCS Software Java Engineer Interview Questions, Process, and Tips

My technology stack includes Java, Spring Boot, Hibernate, MySQL, and Angular.

• Java for backend development

• Spring Boot for creating RESTful APIs

• Hibernate for ORM

• MySQL for database management

• Angular for frontend development

• Experience with AWS and Docker

Program to find even and odd number using lambda expression

• Create a list of numbers

• Use lambda expression to filter even and odd numbers

• Print the even and odd numbers

Sort employees by cities using Stream API

• Create a list of employees with their respective cities

• Use Stream API to sort the list by cities

• Print the sorted list of employees

Memory leakage can be managed by identifying and fixing the root cause of the issue.

• Use a profiler tool to identify the source of the memory leak

• Analyze the code to find out if there are any objects that are not being used and can be removed

• Ensure that all objects are properly disposed of after use

• Use weak references instead of strong references where possible

• Avoid creating unnecessary objects

• Regularly monitor memory u

Spring Boot is a framework that simplifies the development of Java applications.

• Provides a pre-configured environment for building production-grade applications

• Uses embedded servers like Tomcat, Jetty, etc.

• Supports auto-configuration, which eliminates the need for manual configuration

• Offers a wide range of plugins and extensions for easy integration with other frameworks and tools

Controller is used for general MVC architecture while RestController is used for RESTful web services.

• Controller is used for handling user requests and returning a view

• RestController is used for handling RESTful web services and returning JSON/XML response

• RestController is a specialized version of Controller

• RestController is annotated with @RestController while Controller is annotated with @Controller

• Example: @Controll...read more

We use ArrayList and HashMap in our current project.

• ArrayList is used to store and manipulate a list of objects.

• HashMap is used to store key-value pairs for efficient retrieval.

• We also use HashSet for storing unique elements and LinkedList for efficient insertion and deletion.

• The choice of collection depends on the specific use case and performance requirements.

Steps to create a Spring Boot application

• Create a new Spring Boot project using Spring Initializr

• Add necessary dependencies in pom.xml or build.gradle file

• Create a main class with @SpringBootApplication annotation

• Create necessary packages and classes for controllers, services, and repositories

• Configure application properties in application.properties or application.yml file

• Run the application using IDE or command line

To change embedded server in Spring Boot, modify the pom.xml file and application.properties file.

• Update the pom.xml file with the desired server dependency

• Update the application.properties file with the server port and context path

• Restart the application to apply the changes

Hibernate is an implementation of JPA, which is a specification for ORM in Java.

• JPA is a specification for ORM in Java, while Hibernate is an implementation of that specification.

• Hibernate provides additional features beyond the JPA specification.

• JPA is more portable across different ORM implementations, while Hibernate is more feature-rich.

• Hibernate is often used in enterprise applications where complex mappings and c

No, lambda expressions can only be used with functional interfaces.

• Lambda expressions are used to implement functional interfaces.

• Functional interfaces have only one abstract method.

• Lambda expressions provide a concise way to implement the abstract method of a functional interface.

• If a lambda expression is used without a functional interface, it will result in a compilation error.

Microservices offer advantages such as scalability, flexibility, and easier maintenance.

• Scalability: Microservices can be scaled independently, allowing for better resource utilization and cost savings.

• Flexibility: Microservices can be developed and deployed independently, allowing for faster time-to-market and easier updates.

• Easier maintenance: Microservices are smaller and more focused, making it easier to identify a...read more