what is asynchronous

Asynchronous communication refers to the transmission of data without the use of an external clock signal, allowing data to be transmitted intermittently rather than in a steady stream. This type of communication does not require the transmitter and receiver clock generators to be exactly synchronized all the time, enabling variable bit rate. In the context of online learning, asynchronous learning refers to courses where students access course materials, such as lectures, readings, and assignments, on their own time, without a set class time. Asynchronous learning can include watching pre-recorded lectures, undertaking independent research and writing projects, participating in online discussion forums, watching online videos, taking quizzes, completing guided projects, and emailing with classmates when working on team projects. Asynchronous programming, on the other hand, is a technique that enables a program to start a potentially long-running task and still be responsive to other events while that task runs, rather than having to wait until the task has finished. This is particularly relevant in JavaScript, where many functions provided by browsers, especially the most interesting ones, can potentially take a long time, and therefore are asynchronous.