Question

When the “end” event fires on EOF when no more data will arrive, which function is called?

(a) s.on(“data”,f);

(b) s.on(“end”,f);

(c) s.on(“error”,f);

(d) s.on(“default”,f);

The question was asked during a job interview.

Origin of the question is Script Loading topic in division Invocation and Performance Navigation of JavaScript

Answer 1

Right choice is (b) s.on(“end”,f);

The explanation is: In computing, end-of-file (commonly abbreviated EOF) is a condition in a computer operating system where no more data can be read from a data source. The above code snippet gets “end” event fired on EOF when no more data will arrive.