Spring Interview Questions and Answers for 5+ years of Experienced professionals | Code Decode

In this video of code decode most asked interview questions for spring for 5+ years of experience. We have covered mostly asked interview questions in 2023
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Explain the Dependency Injection (DI) and Inversion of Control (IoC) concepts in Spring.
Dependency Injection (DI) and Inversion of Control (IoC) are two fundamental concepts in Spring that work together to achieve loose coupling and enhance the modularity and maintainability of an application.
Inversion of Control (IoC):
Inversion of Control is a design principle where the control of object creation and management is shifted from the application itself to an external container or framework. In traditional programming, a class is responsible for creating and managing its dependencies (other objects it relies on). In contrast, with IoC, the responsibility for creating and managing objects is delegated to a container or framework.
In the context of Spring, the Spring IoC container is responsible for managing the creation and wiring of objects (beans) in the application. The container manages the lifecycle of these beans and handles their dependencies, ensuring that the right dependencies are injected into the right places. By doing so, the application code becomes more focused on its core logic, and the overall architecture becomes more flexible and maintainable
Dependency Injection (DI):
Dependency Injection is a specific implementation of the IoC principle. It is a technique used to inject the dependencies (i.e., collaborating objects or services) of a class into the class itself, rather than the class creating its dependencies. In other words, the dependencies are "injected" from the outside, typically by the IoC container.
What are some common design patterns used in Spring applications?
Singleton Pattern:
The Singleton pattern is one of the most fundamental design patterns in Spring. By default, Spring beans are singletons, meaning there is only one instance of a particular bean per Spring container. This ensures that beans are shared across the application, reducing resource usage and promoting efficient object management.
In Spring, beans can be configured as prototypes (new instance per request) or singletons, depending on the scope defined in the configuration.
Factory Pattern:
The Factory pattern is used in Spring to create and manage beans. The Spring IoC container acts as a factory that creates and manages bean instances based on their configurations in XML or Java-based configuration classes. It abstracts the process of object creation and allows for more flexible, configurable object instantiation.
Spring's FactoryBean interface and the FactoryMethod approach allow for custom factory implementations to create beans programmatically.
Dependency Injection (DI) Pattern:
Dependency Injection is a core design pattern in Spring, facilitating loose coupling between classes. It involves providing the dependencies of a class from the outside rather than the class creating them internally.
Spring's IoC container performs DI by injecting dependencies into classes either through constructor injection, setter injection, or method injection using annotations or XML configuration.
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[@gangadhararaonk]

14:55 15:03 😢😢😢🎉🎉

[@jayjoshi1366]

Great video content on Spring framework. Please make more videos on all Spring Annotations (in detail), Spring Bean Life cycle, Bean Scopes, Spring Profiles, Spring with ORM, with Hibernate, with JPA. Also make some informative and quick fire Spring Boot videos such as - Spring Boot Annotations, OAuth2.0 and OpenID, JWT and some more advanced topics such as Message queues. Please please take kind consideration to this request as I am preparing for interviews with 4+ years of experience and badly searching for awesome content like yours. Thanks in advance!

[@MyAsh1000]

This is awesome, very clearly explained! Thank you so much :)

[@user-sapdev]

Great Content.. Keep Doing the good work. It would be great if you can cover all the design patterns specific to Spring Core/Spring MVC/Spring Security, Hibernate/Spring Data, Rest and MicroServices. with use cases. Something unique content and most needed content. Thanks once again.

[@CodeDecode]

Thanks 🙂🙂

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[@OneEthio]

nice explanation, it's really important, please continue on it, the next spring framework interview

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[@abhimanyusingh8157]

awesome question picked actually same question asked in interview and solution is awesome as well.

[@CodeDecode]

Thanks

[@dhineshm4798]

Your videos are really helpful for me to brush up on the topics, thank you very much.

[@CodeDecode]

Thanks Dhinesh👍🙂

[@prashantkumar-ny2iy]

thanks for this video, please make more such content like this covering interview questions in Java Spring Boot microservices for an experienced person.

[@CodeDecode]

Sure Prashant 👍

[@akashsaha9366]

Great video. Looking for more questions related to 7 years plus on spring 6

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[@user-uz8ef5wl6l]

Thank you very much 🙏🏼

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You are welcome

[@sidhanshuraghuvanshi1]

Appreciates all the concepts explained but would be great with examples like: Facade pattern etc.

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Sure

[@sivaramakrishna6625]

Great Content.. Keep Doing the good work.

[@CodeDecode]

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you are explaining better than other channels

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M glad you felt so 😊

[@someshu9665]

Great video, it really helps a lot. Please continue with spring boot with more other annotations like Postconstruct etc. Thank you.

[@CodeDecode]

sure we will upload it soon

[@dikshameshram3685]

Please make more videos on springboot interview questions,it would be really helpful

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[@moulinamary6231]

can you highlight real life example of using mandatory and optional injection in term of interview view

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[@johnnybreathe]

First time understanding design patterns. Never thought i myself have done some design patterns lol 😅

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[@RajatGupta-vu8xp]

Please create More Questions. It was awesome

[@CodeDecode]

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[@abhimanyusingh8157]

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[@CodeDecode]

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Good Content

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Thanks

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👍

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Can we get this presentation as well, which you use in all your videos?

[@nileshkumarsingh7610]

Mam can we also have one DS & Algo interview questions or tutorial series

[@CodeDecode]

Sure Nilesh 👍

[@nareshreddy7975]

Is a singleton scope a thread safe?

[@CodeDecode]

Yup

[@yodit7443]

Nice work, thanks,could you please also do interviews on spring mvc,

[@CodeDecode]

Sure 😊😊

[@yoshitamahajan353]

Please create for 7 plus year also

[@CodeDecode]

Sure we will create it soon

[@nishanthedaoo8937]

Sir please upload complete video

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[@dailyfeedvlog]

Please create video on web client vs rest template

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[@yourvoices]

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[@Anushaaa_]

Yes

[@rajsaraogi]

How setter stops circular dependency?

[@CodeDecode]

It allows object creation as constructor is not dependent on other bean's creation. Hence deadlock is broken

[@ashrafkhan4097]

Please upload spring interview question part 3.🥺 Its missing !!

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[@user-eb7vz2ux1d]

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[@aishwarya2770]

can you share the pdf link ?

[@muhassinmusthafa3379]

I dont know why I didnt notice this chanel earlier..bad luck..missed many good contents.. The examples of constructor vs setter injection is more useful for interviews..

[@CodeDecode]

Thanks

[@harshitsachdeva4836]

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