Free NestJS Question and Answers — Questions and Answers
Question 1: What is the name of NestJS's main competitor?
- Angular
- RequireJS
- React
- Loopback (Correct answer)
Correct answer: Loopback
LoopBack is a prominent Node.js framework designed for building APIs and microservices, much like NestJS. Both frameworks aim to provide structured and efficient ways to develop server-side applications, particularly for enterprise-grade solutions. Their similar functionalities and target audiences position LoopBack as a direct competitor to NestJS in the Node.js ecosystem.
Question 2: What does NestJS have limited in terms of capturing?
- Events
- Complex types (Correct answer)
- Aggregates
- Collections
Correct answer: Complex types
NestJS, while powerful and TypeScript-centric, can sometimes have limitations in dynamically capturing or inferring highly complex types at runtime. This might require developers to use more explicit type annotations or specific decorators for intricate data structures. This characteristic means that dealing with very 'complex types' can be more challenging compared to frameworks with deeper runtime type reflection.
Question 3: What does PWA stand for?
- Payments Web Applications
- Progressive Web App
- Progressive Web Application (Correct answer)
- Platform-as-a-Service
Correct answer: Progressive Web Application
PWA is a widely used acronym in web development that stands for Progressive Web Application. This term describes web applications that leverage modern web capabilities to deliver an enhanced user experience, mimicking the feel and functionality of native mobile applications directly within a web browser.
Question 4: What function does healthcheck perform?
- Ensuring that your backend application is ready to handle requests (Correct answer)
- Checking that the data you are requesting from a remote source is valid
- Checking the status of your app
- Checking for errors in your application
Correct answer: Ensuring that your backend application is ready to handle requests
A health check function is a critical component in modern backend applications, especially in microservice architectures. Its primary purpose is to provide an endpoint that external systems, such as load balancers or container orchestrators, can query to determine if the application is operational, responsive, and ready to process incoming requests. This ensures high availability and proper traffic routing.
Question 5: What is a Progressive Web Application?
- A website that acts like a mobile app (Correct answer)
- A website that behaves like a native app
- A website that is fast and responsive
- A website that stores user data in the cloud
Correct answer: A website that acts like a mobile app
A Progressive Web Application (PWA) is a web application that utilizes modern web technologies to deliver an experience similar to a native mobile app. PWAs can offer features like offline access, push notifications, and installation to the home screen, bridging the gap between traditional websites and native mobile applications.
Question 6: How does NestJS allow developers to build an application quickly and easily?
- Allowing developers to create modular code
- Automating tasks with scripts
- Using a variety of modules (Correct answer)
- Building tools and libraries to help the development process
Correct answer: Using a variety of modules
NestJS is designed with a strong emphasis on modularity, allowing developers to organize their code into distinct, reusable modules. This modular architecture, combined with its rich ecosystem of built-in and third-party modules, significantly accelerates development. By providing pre-built solutions and promoting a structured approach, NestJS enables developers to build applications quickly and efficiently.
Question 7: What is the name of the built-in microservice abstraction?
- Node.js
- Apache OpenWhisk
- Azure Functions
- NestJS (Correct answer)
Correct answer: NestJS
NestJS is a comprehensive framework that offers robust, built-in support for developing microservices. It provides abstractions and tools for various transport layers, such as TCP, Redis, and gRPC, making it a complete solution for building distributed applications within the Node.js environment. Thus, NestJS itself serves as a powerful microservice abstraction.
Free NestJS Question and Answers
What is the name of NestJS's main competitor?