Microservices Interview questions and answers for experienced and freshers | Code Decode | Part-2

In this video of code decode we have covered some mostly asked microservices Interview question for freshers and experience in Java

Udemy Course of Code Decode on Microservice k8s AWS CICD link:

Course Description Video :

Q) What are the main features of Microservices?
Microservices architecture breaks an application into smaller services, and it is possible to develop, deploy each service independently. This makes the introduction of new features in an application very easier.

Decentralization: Microservices architecture leads to distributed systems. The data management is decentralized. There will be a monolithic database containing all data belonging to the application. Each service has the ownership of the data related to the business functionality of that service.

Black box: Every microservice is defined as a black box. The details of the complexity are hidden from other services/components.

Security: The Microservice platform itself should provide capabilities for certificate management, different types of credentials, authentication, and authentication based on RBAC (Role-based access model). Security is decoupled from the microservice development team as platform standardization help with it.

Polyglot:
This is one of the significant aspects of microservices architecture.
For example, if a team is working on one of the microservice using Java, Spring Boot, and MySQL, another team can work on another microservice using Python, Node JS, and NoSQL.

Different microservices can use a different version of the same programming language. Eg. Python 2.7 and Python 3.0
Different microservices can use different programming languages.
Different microservices can use different architectures as well.

Q) How do microservices communicate with each other?
In the case of Microservice Architecture, there are 2 different types of inter-service communication between microservices.

a. Synchronous communication
b. Asynchronous communication

Synchronous communication:
In the case of Synchronous communication between microservices, the client service waits for the response within a time limit. The possible solution is using HTTP Protocol using via REST API for interservice communication.

Asynchronous Communication:

In the case of Asynchronous Communication, the client service doesn’t wait for the response from another service. When the client microservice calls another microservice, the thread is not blocked till a response comes from the server. The message producer service generates a message and sends the message to a message broker on a defined topic. The message producer waits for only the acknowledgment from the message broker to know that message is received by the broker.

The consuming service subscribes to a topic in the messaging queue. All the messages belonging to that topic will be fed to the consuming system(s). The message producer service and consuming services don’t even know each other. The response is received in the same methodology through a message broker via defined message topics.
Different messaging tools are based on the AMQP (Advanced Message Queuing Protocol). Some examples are given below.

a. Apache Kafka
b. RabbitMQ
c. Apache ActiveMQ

Q)What is the difference between Monolithic, SOA and Microservices Architecture?

Main diff b/w SOA and MS architecture is Based on sharing of data and info. SOA shares and reuses as much as possible while MS focuses on sharing as little as possible

Microservice Interview Questions and Answers part - 1 :

Also if you want to learn microservices from basic you can find all the video in below playlist

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[asashish]

Anybody can crack even senior level of interview if all Playlist of Code Decode is watched.
Thank you!
I can now refresh my knowledge.😌

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[shirishbansode]

I used to fail in many microservices interviews, but after watching your videos, I cleared an interview. Thank you so much !! 👍

[prashantgupta]

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You have so much of knowledge that you can create your own company in IT.

Thanks you so much @code decode

Could you please make a tutorial for Kafka?

[johnnybreathe]

Completed many series of playlists, this one's is very much important and by the way thank you so much for explaining it with ease. Thanks a lot. Waiting for the remaining videos in this series. 🧑‍💻

[sibaramnayak]

I have gone through part 1 and part 2. You explained very well. I am looking forward other videos. Thank you for your effort.

[chetan]

A lot of things are covered in this tutorial. One suggestion is rather than uploading one long hours video create topic-wise. Really liked the way you are covering each topic.

[karthikeyanrm]

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[sachinshrivastava]

one of the best tutorial can't wait for third part as well as I would like to know more about asynchronous communication using microservice

[gayathris]

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[divyashetty]

Each and every video which ur making related to Java, spring boot, Microservice etc are really helpful.Such video not only makes concepts understanding easier but helped us to crack interviews too..
One Request, Can u make the 3rd part of Microservice interview questions and also a tutorial related to Kafka, activemq etc integration with spring boot nd Microservice?

[SaiTeja-ymer]

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[senthilmurugangsm]

Your videos are awesome with easy learn. This makes the micro services more clear. Please prepare videos on Messaging systems. Thanks for your effort and this series. 👏🙂

[anamperwez]

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[tirmuladhanikonda]

Mam... I Cleared the technical round. Thanks a lot 🙏

[jiteshbhardwaj]

Hi Ma'am, Loved your teaching style and explanation.
Please upload the video regarding topics/Questions you were showing at the end of this video. It would help us to cover the theoretical section of Microservices once an for all.
Thanks Again for helping us all !!

[hemika]

Hi sis, your explanation is very very accurate about the topics. If it needs to reach many techies make shorts that will reach more people. I love in with your videos and watching and preparing for interview

[shruthishru]

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[sayanbiswas]

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