#microservices interview questions

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5 Answers to FAQs about Microservices | Charter Global

Top 5 Microservices Interview Questions & Answers Experienced, Top 5 Microservices Interview Questions & Answers Fresher.

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Microservices Interview Questions

Microservices is an engineering approach, which is based on building an app as a collection of small services. The main advantage is the maintainability of code. It is a surrogate method to a serverless approach. Microservices certainly bring more business value but at the same time, it requires a stable and secure technology such as Node.js to develop apps without complexities. Microservices developed in Node.js is most appropriate for enterprise-level projects for improving maintainability.

Microservices are a single self-functional system which, along with other units, form a complex system. Each small unit of the system is a fully functional, scalable, and deployable system. Each unit can be written in different programming languages and tested separately without causing an impact on other parts of the system. Microservices are the big block made up of smaller sub-blocks (Services), with each sub-block being an independent operating unit. If any of the unit (services) goes wrong, it will not take long to replace that service, which in turn reduces the risk of development and the costs involved in the operation of the infrastructure. This architecture is widely used by world-famous organizations including Uber, Netflix, Amazon, eBay, Groupon, and many more. Microservices are not coupled with any technology say Java or Node. You are free to choose any technology to build systems with Microservices style.

Monolithic

Understanding a huge code base becomes difficult, especially for new developers.

Large code files make the development environment slow, like IDE.

Changing technology or language becomes complicated as the code base is tightly coupled.

CI/CD becomes challenging and time-consuming and needs a dedicated team to manage it.

Microservices

They are small and specific to business requirement.

Loosely coupled and can be easily developed and deployed.

Development can be done using different technologies.

Microservices can be built with new technology stack enabling faster development cycles.

Can be easily scaled on demand.

Compared to monolithic architecture, microservices are hands down more beneficial. You don’t need to stuff all software components and services in one big container and pack them tightly.

Building JavaScript applications on microservices help you focus on developing monofunctional modules with clearly defined operations and precise interfaces. The application development process becomes more agile, and the challenges of continuous testing are mitigated. When you build applications on a monolithic architecture, the entire application needs to be deployed with every update.

On the other hand, microservices have no dependency on the type of framework, technique, or programming language being used to build them. Your ability to release REST-ful APIs for communication and other services is the only requisite for microservice architecture.

Note: Different enterprises like Go Daddy, Paypal, Netflix have used this strategy to create scalable applications.

The projects steps that we covered in this project are:

1. Why externalize configuration properties 2. Dynamic routing using Netflix Zuul 3. Client-side load balancing using Netflix Ribbon

Some of the interview questions that we covered in the SkillPractical Spring are:

1. What is Confused Deputy Problem in security context?

2. What is a Gateway in microservice?

3. When designing Microservices, what are the best practices to follow?

4. What are the challenges you face while working Microservice Architectures?

5. Shed light on the basic need of Microservices in today’s context of application development?

6. Which DB is preferred by Microservices based Architecture?

7. Why Would You Need Reports & Dashboards In Microservices?

8. How Would You Perform Security Testing of Microservices?

9. What Are Some Major Roadblocks For Microservices Testing?

10. How can we separate Deployment from Release of Microservices?

For more details on Microservices Interview Questions please visit our website.

SkillPractical has Microservices learning path that helps the user to learn the Java from scratch. If user have any questions on Java Microservices while attempting tests, he can post a question in SkillPractical community. They will get an answer from our expert consultants.

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Microservices interview questions

Microservices is an engineering approach, which is based on building an app as a collection of small services. The main advantage is the maintainability of code. It is a surrogate method to a serverless approach. Microservices certainly bring more business value but at the same time, it requires a stable and secure technology such as Node.js to develop apps without complexities. Microservices developed in Node.js is most appropriate for enterprise-level projects for improving maintainability.

Pre-requisites:

Working knowledge of JavaScript and Node.js

Some exposure to the HTTP protocol

You should've at least heard of Node.js

Node.js and npm (The     Node.js installation will also install npm.)

Microservices are a single self-functional system which, along with other units, form a complex system. Each small unit of the system is a fully functional, scalable, and deployable system. Each unit can be written in different programming languages and tested separately without causing an impact on other parts of the system. Microservices are the big block made up of smaller sub-blocks (Services), with each sub-block being an independent operating unit. If any of the unit (services) goes wrong, it will not take long to replace that service, which in turn reduces the risk of development and the costs involved in the operation of the infrastructure. This architecture is widely used by world-famous organizations including Uber, Netflix, Amazon, eBay, Groupon, and many more. Microservices are not coupled with any technology say Java or Node. You are free to choose any technology to build systems with Microservices style.

Monolithic

Understanding  a huge code base becomes difficult, especially for new developers.

Large code files make the development environment slow, like IDE.

Changing technology or language becomes complicated as the code base is tightly coupled.

CI/CD becomes challenging and time-consuming and needs a dedicated team to manage it.

Microservices

They are small and specific to business requirement.

Loosely coupled and can be easily developed and deployed.

Development can be done using different technologies.

Microservices can be built with new technology stack enabling faster development cycles.

Can be easily scaled on demand.

Compared to monolithic architecture, microservices are hands down more beneficial. You don’t need to stuff all software components and services in one big container and pack them tightly.

 Why Microservices with Node.js?

A rich database of multiple JavaScript modules provided by Node.js simplifies the application development significantly. Software architects prefer Node.js as a technology partner for developing JSON API-based applications, I/O bound applications, data streaming applications, single-page applications, and data-intensive real-time applications. Some of the benefits are listed below.

Productivity: Node.js uses NPM (node package manager) which comes up with tons of ready to use modules that speed up the development process. Node.js uses javascript as interface language so that the same language can be used for back end and front end. This saves lots of development time.

Performance: Node.js event-driven I/O model along with microservices strategy which can handle an extreme amount of load with the lesser response time.

Friendly to Developer: Node.js has vast community support and is backed by millions of developers across the globe. The Node package manager (NPM) contains more than 4 million ready to use modules which serve as a heaven for developers. Node.js enables faster development of applications that are easily scalable, thereby making the developer happy throughout the application development life cycle.

Some of the interview questions that we covered in the SkillPractical Spring are:

1. What is Confused Deputy Problem in security context?

2. What is a Gateway in microservice?

3. When designing Microservices, what are the best practices to follow?

4. What are the challenges you face while working Microservice Architectures?

5. Shed light on the basic need of Microservices in today’s context of application development?

6. Which DB is preferred by Microservices based Architecture?

7. Why Would You Need Reports & Dashboards In Microservices?

8. How Would You Perform Security Testing of Microservices?

9. What Are Some Major Roadblocks For Microservices Testing?

10. How can we separate Deployment from Release of Microservices?

For more details on Microservices Interview Questions please visit our website.

SkillPractical has Microservices learning path that helps the user to learn the Java from scratch. If user have any questions on Java Microservices while attempting tests, he can post a question in SkillPractical community. They will get an answer from our expert consultants.

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Top 20 Microservices Interview Questions & Answers Experienced

According to a Gartner Report, Microservices is a new application platform for cloud development. It can be deployed or managed independently and once they are implemented within containers, it results in little interaction with the underlying OS.