Microservices Architecture Practice Test 2025

A microservice architecture, which is a variation of the service-oriented architecture (SOA) structural style, divides an application into loosely connected services. The services in a microservices architecture are fine-grained, and the protocols are light. The idea is for teams to be able to bring their services to life without relying on others. Loose coupling lowers all forms of dependencies and the complications that come with them because service developers don’t have to worry about the service’s users, and they don’t force their modifications on them.

Microservices architecture is a sort of application architecture in which the application is built as a series of services. It provides a framework for autonomously developing, deploying, and maintaining microservices architectural diagrams and services.

There are numerous microservice communication patterns that can be implemented in a microservice-based architecture. It’s possible to do it in a synchronous or asynchronous pattern.

It is not risk-free to use automated tests to ensure that a program works. There’s still a good risk the application won’t operate if it’s done incorrectly. To answer the problem, use a variety of tests with varying granularities. Use the testing pyramid.

Decoupling a monolithic program into discrete modules that each include the components required to execute a particular business function is a common way to achieve microservice architecture. These services usually connect with one another via language-independent APIs such as REST.

Microservices are used to solve the problems that monolithic applications have. Organizations benefit better fault tolerance and faster deployment times since services are modest in scope and include a modular design made up of numerous loosely linked components, allowing for continual enhancements and frequent feature releases.

Microservices usually communicate with one another. That is precisely the point. With Eureka discovery in place, you can simply call the microservice by name rather than the FQDN.

Microservices are a type of service-oriented architecture style (one of the most significant Java developer skills) in which programs are constructed to aggregate multiple smaller services rather than a single larger app.

Microservices in ASP.NET Core are a style of architecture in which an application is built as a collection of small, self-contained serviceable components. This article will go over how to build microservices with ASP.NET Core, Serilog, Swagger UI, Health Checks, and Docker containers in great detail.

Microservices and Node.js Microservices architecture is a kind of architecture. It is not integrated with any other technology, such as Java or Node.

Microservices are commonly used to accelerate application development. Microservice designs based on Java, particularly Spring Boot frameworks, are widespread. Microservices and service-oriented architecture are frequently compared.

A great solution for this problem is to combine microservices and Pivotal Cloud Foundry’s agility and scalability with the Solace Hardware Messaging Appliance’s low (and deterministic) latency.

A Eureka Server Service is required to discover and communicate Microservices with one another. The process of setting up a Eureka Server is identical to that of setting up a Microservice. It’s also just a Spring Boot Project that includes the Eureka Server dependency from Spring Cloud.

Using pure virtual machines or a physical host, you might deploy a whole application using microservices. However, given how containers function and what they’re designed to do, you might deploy each service as a collection of containers that can communicate with one another, making container deployment a natural choice.

You’ll need to assemble each individual service, as well as the underlying databases, on the local system to test these complicated applications locally. Locally, testing microservices frequently entails running a half-dozen terminal sessions on a single system.

A microservice canvas is a useful tool for documenting a service and its structure. A microservice canvas is a short summary of a service. It looks like a CRC card, which is sometimes used in object-oriented design.

Java is a good language for creating microservices. Its annotation syntax is simple to read, among other things. Microservices are significantly easier to write with Java annotations, especially when using a framework like Spring Boot. Readability is extremely important, especially when working with complicated systems.

The benefits of microservices appear to be compelling enough to have persuaded some major corporations, like Amazon, Netflix, and eBay, to adopt the concept. Microservices provide the following benefits over more monolithic design structures:

• Larger applications can be mostly unaffected by the failure of a single module due to improved fault separation.
• Remove vendor or technology lock-in: Microservices provide you the freedom to experiment with different technology stacks on individual services as needed. There will be fewer dependencies to worry about, and reverting changes will be considerably easier. There is more freedom when there is less code in play.
• Developers will be able to better comprehend the functionality of a service if it is made more simple.
• Smaller and faster deployments: Smaller codebases and scopes result in faster deployments, allowing you to experiment with the benefits of Continuous Deployment.
• Scalability: Because your services are independent, you can scale the most critical ones at the right moments rather than the entire application. This can result in cost savings if done appropriately.

Microservices are divided into two categories: Stateless services are excellent candidates for serving as the foundation of a distributed system. Stateless microservices, as the name implies, do not keep session state between requests; for example, if one of the service instances is removed, the overall processing logic for the service is unaffected. Stateless microservices are preferred by distributed systems. Microservices that store session information in the code are known as stateful microservices. When two or more microservices communicate, a service request state is maintained.

The saga is a series of local transactions in each of the microservices involved. It has its own set of steps to follow, and once each one is finished, it uses logic to choose what to do next. The saga must ensure that all of the phases are completed effectively, or it will have to roll back if required.

The word “microservices” first appeared in 2011 during a conference for software architects, when it was used to describe a style of architecture that many of the attendees were experimenting with at the time. Microservices were pioneered by Netflix and Amazon, among others.

Containers and microservices are not the same thing.

Authentication and authorization will be handled by a dedicated microservice. Before executing the request, each business service must authenticate it by sending it downstream to the authentication service. This strategy, however, has significant drawbacks: the authorization check is a commercial matter.

Amazon, Netflix, Uber, and Etsy, among the most inventive and successful microservices examples among corporate firms in the world, credit their IT initiatives’ huge success in part to the adoption of microservices.

Microservices, according to AWS, are self-contained bits of software that perform specified duties, run independently of one another, and are owned by smaller, self-contained teams. Microservices communicate with one another via well-defined APIs, enabling for polyglot development.

To circumvent the foregoing restrictions, combine CQRS (Command Query Responsibility Segregation) with event sourcing. CQRS is another design pattern used in microservices architecture which would have a separate service, model, and database for insert operations in the database.

Microservices architecture is a method of constructing a server application out of a series of small services. Each service should run in its own process and communicate with other services using HTTP/HTTPS, WebSockets, and other protocols.

Spring Boot is a Java framework that may be used to build Microservices. This framework is free and open source.

Monolithic architecture consists of a single huge system with a single code base. As the application expands, monolithic applications become increasingly tightly connected and entangled, making it impossible to isolate services for goals such as independent scaling or code maintainability. Microservices architecture, on the other hand, is created as a small, self-contained module based on business functionality. Each project and service in a microservices application is code-wise independent of the others. As a result, it’s simple to set up and deploy, as well as scale up and down dependent on demand.

Microservices should not be used when the system’s performance is crucial.

Because microservices are independent processes, they are unable to share database connections. For scalability, resilience, and simpler development with big teams, you separate an application into microservices. These advantages come at a cost in terms of (per-instance) performance and more sophisticated architecture.

Docker enables you to containerize your microservices, simplifying their delivery and management. Individual microservices have their own segregated workload environments thanks to containerization, making them deployable and scalable independently.

Because microservices development is polyglot, various teams might create their own programming languages and frameworks to implement security. When integrating security, it is critical to follow a common security standard such as OAuth 2.0, as this will make the clients’ lives much easier.

Contract testing is a technique for testing an integration point that involves isolating each microservice and determining if the HTTP requests and replies that the microservice transmits comply with a contract’s shared understanding. Contract testing guarantees that microservices can communicate with one another in this fashion.

Service-oriented architecture (SOA) is an enterprise-wide approach to application component software development that makes use of reusable software components, or services. Each service in a SOA software architecture is made up of the code and data integrations needed to carry out a given business function, such as checking a customer’s credit, logging onto a website, or processing a mortgage application. Microservices architectures, like SOA, are made up of loosely linked, reusable, and specialized components that often work in isolation. Microservices also make extensive use of cohesiveness, often known as bounded context.

Eureka Server is a program that keeps track of all of the client-service apps. Each Micro service will register with Eureka, and Eureka will be aware of all client applications operating on each port and IP address. Discovery Server is another name for Eureka Server.

Microservices are a means to break down huge programs into small, self-contained services, allowing you to develop web-scale applications. Microservices allow IT firms to be more flexible while also lowering expenses.

Microservices are great for large firms, but they can be difficult to develop and maintain for small businesses that need to create and iterate rapidly without becoming bogged down in sophisticated orchestration.

Semantic versioning is a solid and extensively used approach. MAJOR.MINOR.PATCH is a three-part string. Only when the changes are breaking the clients should the MAJOR version be incremented. When the changes do not break the clients, the MINOR version should be incremented. A bug fix is indicated by a PATCH version change.

Docker is not microservices, and using Docker is not the only way to build microservices.” Microservices and Docker are a great pair for implementing and scaling microservices, which is why huge companies like Netflix, Spotify, and IBM have adopted them.

When one microservice fails, it puts its collaborators under pressure and puts them at danger of failing as well. The collaborators will be unable to query, issue commands, or poll events from the failed microservice while it is down.

Consul is a multi-networking tool that provides a fully featured service mesh solution for operating microservices and cloud infrastructure. Routing and segmentation are handled by Consul using software.

DRY is a phrase that means “don’t repeat yourself.” Within a system, every item of knowledge must have a single, clear, and authoritative representation, according to this principle. It encourages code reuse.

The ability to provide high availability for your application is one of the main reasons why microservices have become so popular. To achieve this high availability, you should avoid tightly coupling services and instead keep the connections free.

Microservices may appear to be a passing fad, but firms will want to adopt the architecture to avoid missing out on the newest trend.

Microservices are more about architecture and design style than RESTful API, yet RESTful API makes it easy to construct a loosely linked Microservices. Prior to Microservices, RESTful API was introduced.

Each microservice is associated with a single context and has its own database.

In certain circumstances, a microservice may have only one endpoint, but in others, there may be multiple endpoints. Take, for example, a sensor data service that collects sensor data and has two logical endpoints: create and read.

Avoid single points of failure when developing your microservice. It’s always a good idea to consider how your microservice will behave if one of its components fails. This will lead to a more positive dialogue and will aid in the development of a fault-tolerant service.

Maintain a database with a collection of tables dedicated to specific services. When storing all of the tables in a single database, use a prefix or suffix to identify which Microservice each table belongs to. Foreign key constraints should not be maintained across tables belonging to separate Microservices.

The Multiple Service Instances per Host pattern is one approach to deploy your microservices. This pattern requires you to set up one or more physical or virtual hosts and run numerous service instances on each of them. This is, in many ways, the traditional method of application deployment.