Java Spring Boot Developer Interview Questions and Answers for Freshers

Spring is a framework that provides a comprehensive programming and configuration model for Java applications. Spring Boot is a framework that simplifies the setup and configuration of Spring applications.

• Spring is a larger framework that provides various modules for different functionalities like dependency injection, MVC, security, etc.

• Spring Boot is an opinionated framework that auto-configures the Spring application with sensible defaults, reducing the need for manual con...read more

Logging in Spring Boot is a feature that allows developers to track and record events and errors that occur during application runtime.

• Spring Boot uses the popular logging framework, Logback, for its logging capabilities.

• Developers can configure logging levels and output formats in the application.properties or application.yml file.

• Logging can be used to track application performance, debug errors, and monitor user activity.

• Spring Boot also provides a convenient way to view a...read more

Spring Actuator is a tool that provides endpoints to monitor and manage Spring Boot applications.

• Actuator provides health, metrics, info, and other endpoints

• It can be used to monitor and manage the application's health and performance

• Actuator endpoints can be customized and secured using Spring Security

• Examples of endpoints include /health, /metrics, /info, /env, and /shutdown

String is immutable, String Buffer is mutable.

• String is immutable, meaning its value cannot be changed once it is created.

• String Buffer is mutable, meaning its value can be changed after it is created.

• String is faster and more memory efficient for simple string operations.

• String Buffer is slower but more efficient for operations that require frequent modifications.