Microservice Interview Questions PDF | Most Asked Microservice Interview Questions and answers
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Microservice Java Interview Questions and Answers
| Quiz Name |
Microservice |
| Total Questions |
30 |
| Category |
Interview |
Important Link
Microservice Interview Questions & Answers
1. What do you understand by Monolithic Architecture?
- Monolithic architecture is like a big container that contains all the software components of an application.
- This applications are clubbed inside a single package within the application.
2. What are the main components of Microservices?
- Containers, Clustering, and Orchestration
- IaC (Infrastructure as Code Conception)
- Cloud Infrastructure
- API Gateway
- Enterprise Service Bus
- Service Delivery
3. Which are some famous companies that are using Microservice architecture?
- Most large-scale software companies and websites such as Twitter, Netflix, Amazon are using microservices architecture instead of monolithic architecture.
4. What are the biggest challenges in Microservice deployment?
- It requires a heavy infrastructure setup also.
- Microservices require a heavy investment.
- We need excessive planning for managing operations overhead.
- It cost a lot in staff selection and maintenance.
5. What are the three commonly used tools for Microservices?
6. What do you understand by Spring Cloud?
- Spring cloud is an Integration software used to integrate with external systems.
- It allows a microservices framework to build applications that perform restricted amounts of data processing.
7. What are the main advantages of using Microservices?
- Microservices provide great technology diversity. You can mix it easily with other frameworks, libraries, and databases.
- It provides excellent support for the minor and parallel team.
- It reduces the deployment time significantly.
- Independent deployment
8. How does a Microservice architecture work?
- An application is fragmented into loosely coupled various modules, each of which performs a distinct function.
- It is distributed across clouds and data centers.
- Under microservice architecture, an application can grow along with its requirements.
9. What are the three types of tests used in Microservices?
- Bottom Level Test
- Middle-Level Tests
- Top Level Tests
10. What is the main difference between SOA and the Microservices Architecture?
- SOA stands for Service Oriented Architecture.
- It is a collection of services used to communicate with each other through simple data passing or activity coordination.
11. What are the most significant disadvantages of using Microservices?
- It requires accurate pre-planning before use.
- It uses modular dependencies that are hard to calculate.
- The third-party applications are hard to control.
- More opportunities for malicious intrusions.
- Complete end-to-end testing is complex.
- Deployment Challenges.
12. What is a Client certificate? What is its usage?
- A client certificate is a digital certificate used to make authenticated requests to a remote server.
- A certificate is generated for each microservice.
13. What are the different strategies used in Microservices deployment?
- Multiple Service Instance per Host
- Service Instance per Host
- Service Instance per Container
- Serverless Deployment
14. What are the most significant benefits of using microservices?
- The most significant benefit of using microservices is that it builds an application to collect small autonomous services developed for a business domain.
- Business needs to change constantly, the development teams can rapidly build new apps components to meet the requirement.
15. What do you understand by RESTful?
- REST or RESTful stands for Representational State Transfer.
- The RESTful web service is an architectural style that helps computer systems to communicate over the internet.
- This web services make microservices easier to understand and implement.
16. What are the most significant advantages of using Microservices?
- Provide improved scalability
- Increased Agility
- Localized Complexity
- Provide fault isolation
- Smaller development teams
- You can easily upgrade the technology etc
17. In which cases microservice architecture is best suited?
- The microservice architecture is best suited for all tech devices such as desktop, web, mobile devices, Smart TVs, Wearable devices, etc.
18. What are the principles Domain-Driven Design?
- Focus on the core domain and domain logic.
- Base complex designs on models of the domain.
- Collaborate with the domain experts to improve the application model and resolve any emerging domain-related issues regularly.
19. What do you understand by Domain-Driven Design?
- Domain-Driven Design is an architectural style based on Object-Oriented Analysis Design concepts and principles.
- It is used to develop a complex system by connecting the related components of the software system into a continuously evolving system.
20. What do you understand by semantic monitoring in Microservices architecture?
- Semantic monitoring is used to combine the automated tests by monitoring the application.
- It is used to find out the reasons why your business is not getting more profits.
21. What are the main differences between Microservices and Monolithic Architecture?
| Microservices |
Monolithic Architecture |
| It is a loosely coupled architecture. |
It is primarily a tightly coupled architecture. |
| The service startup is fast in Microservices. |
The service startup takes time as it is slow in Monolithic Architecture. |
22. What do you understand by OAuth?
- OAuth stands for Open Authorization protocol.
- This protocol allows you to access the client applications on HTTP for third-party providers GitHub, Facebook, etc.
- It also facilitates us to share resources stored on one site with another site without their credentials.
23. What is Spring Cloud?
- Spring Cloud is a collection of tools used by developers to quickly build some of the common patterns in distributed systems such as configuration management, circuit breakers, service discovery, intelligent routing, micro-proxy, control bus, one-time tokens, global locks, leadership election, distributed sessions, cluster state and more.
24. What are Microservices?
- Microservices are an architectural approach or style that is used to build applications.
- The microservice architecture provides a rapid, frequent and reliable delivery of large and complex applications.
25. What is the use of containers in Microservices?
- Containers are the easiest and effective method to manage microservice-based applications.
- They are like a software development platform.
- They also help us to develop and deploy individually.
26. What is Spring Boot? Why is it used?
- Spring Boot is an open-source, Java-based framework that provides developers an excellent platform for developing a stand-alone and production-grade spring application.
- It is easy to understand, reduces development time, and increases productivity. It automatically configures a claim based on the added dependencies of an application.
27. What is the difference between Coupling and Cohesion?
| Coupling |
Cohesion |
| Coupling is specified as a relationship between module A and another module B. There are mainly three types of coupling |
Cohesion is the relationship between 2 or more parts within a module. |
| Any module can be highly coupled (highly dependent), loosely coupled, and uncoupled with other modules. |
The high cohesion within a module specifies that the module can perform a specific task with maximum efficiency on its own, without the need to communicate with other modules. |
28. What do you understand by end-to-end Microservices testing?
- End-to-end testing is used to validate that every process in the workflow is functioning correctly.
- It also ensures that the system works together as a whole and fulfills all the requirements.
29. What is the method to override a Spring Boot project’s default properties?
- We can do it by specifying the properties in application properties.
- The Spring MVC applications need the suffix and the prefix to be specified i.e For suffix:mvc.view.suffix: .jsp For prefix:mvc.view.prefix: /WEB-INF/
30. What is the use of PACT in Microservices architecture?
- PACT is an open-source tool used for testing interactions between service providers and consumers.
- It increases the reliability of the Microservices applications.
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