Best 30 Microservices Interview Questions & Answers. Microservices, which have been around since 2011, is making waves, particularly among companies developing forward-thinking applications.
Nginx estimates that 36% of enterprises use Microservices currently, with another 26% researching their implementation. Microservices are perfect if you are considering changing your technology or learning a new one. Here are several reasons why you should consider Microservices. This article discusses the top 30 Microservices Interview Questions asked to both freshers and experienced developers in different interviews. Best 30 Microservices Interview Questions
Best 30 Microservices Interview Questions
What do you mean by Microservice?
An SDLC approach in which large applications are built as a collection of small functional modules, microservices, is also known as Microservices Architecture. It is one of the most widely used architectural concepts in software development. In addition to making maintenance easier, this architecture also speeds up development.
Microservices are also a huge asset for the latest methods of software development, such as DevOps and Agile. Moreover, it helps deliver large, complex applications quickly, frequently, and reliably. The applications are modeled as collections of services, including:
- Testable and maintainable
- In loose coupling
- Easily deployable on its own
- Designed or organized according to business capabilities
- A small team manages the project
1) Explain the microservices architecture
A Microservice Architecture develops an application as a collection of small independent services developed for a specific business domain. Best 30 Microservices Interview Questions
2) Identify three commonly used microservices tools
- Microservices tools include 1.) Wiremock, 2.) Docker, and 3.) Syria.
3) What is Monolithic Architecture?
In a monolithic architecture, all of the software components of an application are housed inside a single package.
4) What are the advantages of microservices?
The following are some significant advantages of using Microservices:
- Microservices can easily be combined with other frameworks, libraries, and databases due to their technology diversity
- An isolated fault, i.e., a process failure, should not bring the entire system down.
- Support for smaller and parallel teams
- Deploying independently
- Efficiencies in deployment
5) What is Spring Cloud?
Integration software that integrates with external systems is Spring cloud. Using the microservices framework, applications can be built that perform limited amounts of data processing.
6) Describe the use of reports and dashboards in the microservices environment
Monitoring and maintaining Microservices can be done with reports and dashboards. There are several tools available for monitoring applications.
7) What are the main differences between Microservices and Monolithic Architecture?
|Using microservices||Architecture based on monoliths|
|Startup of the service is fast||The startup of service takes time|
|A loosely coupled architecture is a microservice.||Monolithic architectures are usually tightly coupled.|
|The changes made to one Microservice do not affect the other Microservices.||The data model is affected by all changes|
|Product-oriented, not project-oriented, microservices||Monolithic placed emphasis on the whole project|
8) How do microservices present challenges?
- Microservices are always interdependent. Therefore, they must communicate with each other.
- It is a heavily involved model since it is a distributed system.
- You need to prepare for operations overhead if you are using Microservice architecture.
- Supporting heterogeneously distributed microservices requires skilled professionals.
9) In which cases microservice architecture best suited?
An ideal microservice architecture combines desktop, web, mobile, smart TV, wearable, and other devices.
10) Name a few famous companies that use Microservice architecture
Twitter, Netflix, and Amazon have migrated from monolithic architecture to microservices architecture.
11) What are the characteristics of Microservices?
- Frameworks for messaging
- Governance decentralized
- Automation of infrastructure is easy
- Failure-proof design
- Automation of infrastructure
12) What is RESTful?
In an architectural style known as REST/RESTful web services, computer systems communicate over the internet by using representational state transfer (REST). Microservices are easier to understand and implement with these web services.
13) Explain three types of Tests for Microservices? In Microservice architecture tests are divided into three broad categories:
- We can perform a general test at the bottom level, such as performance and unit tests. Tests of this type are entirely automated.
- We can perform exploratory tests, such as stress tests and usability tests, at the middle level.
- At the top level, we can conduct acceptance tests, which are usually fewer in number. Additionally, it helps stakeholders learn about the different features of the software.
14) What are Client certificates?
A client certificate is a digital certificate used to authenticate requests to a remote server. It is referred to as a client certificate.
15) What is PACT in Microservices architecture?
It is an open-source tool for testing interactions between service providers and consumers. Nevertheless, it is separate from the contract made. Microservices applications become more reliable as a result.
16) What is the meaning of OAuth?
client applications can be accessed via HTTP for third-party providers through this protocol Auth stands for open authorization Describe the procedure. Through this protocol, you can access the client applications on HTTP for third-party providers such as GitHub, Facebook, etc. It allows you to share resources stored on one website with another without requiring their credentials.
17) What is End to End Microservices Testing?
Testing the workflow end-to-end validates that the processes are running as they should. Additionally, it ensures that the system works as a whole and that all requirements are met.
18) Why are containers used in Microservices?
Containers are the easiest and most effective way to manage microservice-based applications. Additionally, it enables you to develop and deploy independently. In addition, you can encapsulate your microservice in a container image along with its dependencies using Docker. These elements can be used by microservices without additional effort.
19) What does semantic monitoring mean in microservices architecture?
Monitoring semantically combines automated tests with application monitoring. It helps you discover why your business isn’t getting more profits.
20) What is a CDC?
CDC stands for Consumer-Driven Contract. The pattern is used to develop Microservices that can be used by external systems.
21) What is the use of Docker?
A container environment can be used to host any type of application using Docker. It is tightly bundled with the dependencies that support it.
22) What are Reactive Extensions in Microservices?
Rx is also known as Reactive Extensions. In this pattern, results are gathered by calling multiple services and then compiling them into a single response. In distributed systems, Rx is a popular tool that operates in the opposite direction of legacy flows.
23) Explain the term ‘Continuous Monitoring.’
A continuous monitoring program is used to search for compliance and risk issues associated with a business’s operational and financial environment. Human resources, processes, and working systems are all factors that support efficient and effective operations.
24) How do independent micro-services communicate with each other?
Depending on your project needs. Yet developers usually use HTTP/REST with a binary or JSON protocol. They can, however, use any communication protocol.
Best 30 Microservices Interview Questions