Question

What will happen if we call setTimeout() with a time of 0 ms?

(a) Placed in stack

(b) Placed in queue

(c) Will run continuously

(d) Will execute immediately

This question was addressed to me in an interview for job.

Origin of the question is The Document Object Model topic in section Document Object Model and Event Handling in Javascript of JavaScript

Answer 1

Right answer is (b) Placed in queue

To explain: If you call setTimeout() with a time of 0 ms, the function you specify is not invoked right away. Instead, it is placed on a queue to be invoked “as soon as possible” after any currently pending event handlers finish running.