Top 50 Spring Interview Questions

What is Dependency Injection

What are different Bean Scopes?

What is Spring Bean Lifecycle?

Which one is better - setter based injection or the constructor injection?

How to inject a Prototype Bean into Singleton Bean.

Are singleton beans thread-safe?

How will you run certain code on Bean Post construction?

How will you retry a failed method call using Spring retry? Lets say sending an email fails, how it can be retried again automatically.

How will you handle unresolvable circular dependency in spring dependency injection?

What is role of Dispatcher Servlet?

How to log method execution time in Spring MVC using Interceptor?

What is difference between @Controller, @Component, @Repository, and @Service Annotations in Spring?

What is a ViewResolver?

How will you ensure that slow i/o operations at controller layer do not exhaust the servlet container threads?

Deferred Result and Async Handling of web requests.

How to prevent duplicate form submission in Spring MVC?

What format should i send date from Server to Client so that time zone information is not lost?

How to use Projections to fetch the limited content from database?

How to send email only if database transaction is successful?

What is @NoRepositoryBean? When will you use it?

How to modify a record in database using update query? Give an example.

What is difference between findOne() and getOne() method of Spring Data JPA Crud Repository?

What is CSRF Protection mechanism?

What is difference between ignoring a path for web security vs permit all on a Path?

What is Spring Security Architecture, explain using Diagram.

What is difference between authentication and authorization?

How does OAuth2 works?

Explain adaptive one way Hashing functions for storing a password

Support for multiple Authentication providers in single spring boot application using spring security

What is Spring Boot and what are its advantages?

How to enable Cache Busting?

How to restrict Spring Boot app on certain ipaddress only? lets say localhost.

Exception handling in Spring Boot