"this" is a common interview question and a very common source of bugs. Learn the purpose of "this" and understand how to avoid common mistakes.

Learn about the differences between ES6 (ES2015) module import statement, Node's `require()`, Node's ESM support and the new dynamic import() method.

Learn about different web protocols for services REST vs SOAP vs RPC vs GraphQL vs CQRS.

Learn about the differences between four main categories of cloud computing: Infrastructure as a Service (IaaS) vs Platform as a Service (PaaS) vs Backend as a Service (BaaS) vs Functions as a Service (FaaS).

Learn about benefits of using container technologies and why they are better idea than just having virtual machines or no virtualization at all.

Learn what are microservices in the most simple and easy way. Understands the benefits of microservices and the drawbacks and some negative aspects of using microservices.

Learn why serverless and Functions as a Service (FaaS) is so popular, what benefits it has over traditional cloud platforms and what are some serverless services which will allow you to get started with developing your own serverless architecture for free.

Learn what you need to do to implement a GraphQL API in Node.

Learn about benefits of GraphQL over RESTful API and why GraphQL will kill REST API just like REST killed SOAP 10 years ago.

Learn how to avoid error "Not allowed by Access-Control-Allow-Origin", enable CORS and what is JSONP.