Every method in
fs
module has synchronous as well as asynchronous form. Asynchronous methods takes a last parameter as completion function callback and first parameter of the callback function is error. It is preferred to use asynchronous method instead of synchronous method as former never block the program execution where the latter one does.
Итог
Key takeaway for interview: What is difference between synchronous and asynchronous method of fs module?
Node.js · junior · сложность 3