![]() ![]() Explain the difference between frontend and backend development?įrontend refers to the client-side of an applicationīackend refers to the server-side of an application Complex SPAs (Single-Page Applications)ġ0.Node.js is widely used in the following applications: The medium can be a physical device, network, or files within a system Every transfer is an output from one medium and an input into another.The term I/O is used to describe any program, operation, or device that transfers data to or from a medium and to or from another medium.The control flow of asynchronous logic is more specified and structured.What are the advantages of using promises instead of callbacks? All APIs of Node are written to support callbacks. Being an asynchronous platform, Node.js heavily relies on callback. #Other side incorrect authentication express talk codeIt allows other code to be run in the meantime and prevents any blocking. Explain callback in Node.js.Ī callback function is called after a given task. The event loop is the processing model's beating heart in Node.js. As a result, Node.js can easily manage more concurrent client requests. The Node JS Processing paradigm is heavily influenced by the JavaScript Event-based model and the JavaScript callback system. The Multi-Threaded Request/Response Stateless Model is not followed by the Node JS Platform, and it adheres to the Single-Threaded Event Loop Model. If Node.js is single-threaded, then how does it handle concurrency? By doing async processing on a single-thread under typical web loads, more performance and scalability can be achieved instead of the typical thread-based implementation. Node.js is single-threaded for async processing. Once the task is carried out completely, the response is sent to the Event Loop that sends that response back to the client. This thread is responsible for completing a particular blocking request by accessing external resources, such as computation, database, file system, etc.
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